Acid Dissolution Research Articles

Acid dissolution of neodymium magnet Nd-Fe-B in different conditions

The separation of rare-earth elements (REE) from a neodymium magnet has been widely studied last year. During the research it was identified that the waste of computer hard disk contains 25.41 % neodymium, 64.09 % iron, and <<1 % boron. To further isolate rare-earth metals, the magnet was acidically dissolved in open and closed systems. In both methods of dissolution, concentrated nitric acid was used. The difference between these methods is the conditions of dissolution of magnet. The magnet was dissolved in a microwave sample preparation system at different temperatures and pressures in a closed system. In the open system, the acid dissolution of the magnet is conducted at room temperature. 0.2 g of the neodymium magnet sample was taken under two conditions, and the dissolution process in the closed system lasted 1 hour, and in the open system 30-40 minutes. The open system is a non-laborious, simple, and cheap method of dissolving the magnet by comparing both systems. Therefore, an open sample preparation system is used for further work. To remove the iron in the magnet, oxalic acid was used and REEs are precipitated as oxalates under both conditions. According to the result of the Inductively coupled plasma mass spectrometry (ICP-MS) method, it was identified that the neodymium and iron contents in the precipitate are 24.66 % and 0.06 %, respectively. This shows that the iron has almost completely passed to the filtrate

A supersaturating drug delivery system to enhance the oral bioavailability of nilotinib

As a weak base, the solubility of nilotinib (NH) decreases with increasing pH resulting in low bioavailability via oral administration. In our study, NH was selected as a model drug to explore a supersaturating drug delivery system (SDDS) to improve the absorption and bioavailability of BCS IV drugs. Certain excipients were used to prevent or delay the precipitation of NH after pH increment. Hence, the solid dispersions of NH were synthesized in the presence of either Eudragit E100 (ESD) or Soluplus (SSD), respectively. Both ESD and SSD are proven to rapidly dissolve in the acidic dissolution medium, forming supersaturated NH solutions after the pH increment to 6.8, while the supersaturated solution of NH was kept stable for a sufficient time period. NH was found to exist in the microcrystalline form in the ESD and amorphous form in the SSD. The relative bioavailability of ESD and SSD in rats was 222% and 219%, respectively, compared with NH suspension, suggesting that the two formulations developed in our study significantly improved the oral absorption of NH. Overall, SDDS represents a promising strategy to improve the oral bioavailability of NH and such platform technology may be explored to other BCS II or IV drugs with poor solubility.

Influences of rock microstructure on acid dissolution at a dolomite surface

Acid etching in a naturally fractured carbonate formation is one of the most significant mechanisms to enhance the fluid conductivity in fractures. In this paper, an acid dissolution experiment has been employed to understand the influence of rock microstructure on the acid etching involving reaction rate, the morphology of acid corrosion, and the embedding strength of a fracture surface. Three typical dolomite samples with almost the same mineral composition but distinct microstructures were selected from the Wumishan Geothermal carbonate formation that is composed of dolomudstone, algal dolomudstone, and silt-to-fine crystalline dolostone. A couple of measurement approaches including the thin section, SEM, 3D laser scanning, and nano indentation tests were used to observe and quantify the microstructures, reaction rate, and embedding strength of the fracture surface. Microstructure characterization indicates that the dolomudstone contains much finer crystal particles and a loose microstructure compared to other two samples. On the contrary, the silt-to-fine crystalline dolostone reserves coarse crystal particles and a tight microstructure. The structure of algal dolomudstone falls in between those two mentioned cases. Results of acid dissolving reveal that rock microstructures offer control over the acid-rock reaction of dolomite. Specifically, the loose microstructure of dolomite depicts a fast acid reaction, a rough surface, but weak embedding strength, while the compact microstructure behaves as a slow acid reaction, a uniform etching, and with a strong embedding strength. The knowledge obtained from this study is valuable to optimize the acid dissolution strategy from the view of the microstructure analysis.

Use of KOH in IBA dissolution and substrate formulation in the rooting of Acer palmatum Thunb. cuttings

Acer palmatum is a species widely used in landscaping in southern Brazil. It has some limitations in propagation via seeds, therefore, cutting is a viable propagation method, especially when plant regulators and plant substrates are properly. The objective was to evaluate substrate and solvent compositions for indolebutyric acid (IBA) dissolution in the rooting of Acer palmatum cuttings. Apical herbaceous cuttings were used and inserted for five seconds in IBA solution (8 g L-1) diluted in hydroalcoholic solvents (50%) and potassium hydroxide (0.5 M KOH). Then, they were established in multicellular trays with substrates carbonized rice husk (CRH) and expanded clay (EXCL), isolates and in mixtures (1:1; 2:1 and 1:2, v/v). The experimental design was completely randomized in a 2 x 5 bifactorial scheme (forms of dissolution of IBA x substrates), in four replications of 10 cuttings. The results showed no interaction between the factors. However, the dissolution of IBA in KOH and the substrates CRH and EXCL (1:2 and 2:1, v/v) provided higher rooting and leaf retention. In addition, the substrates showed greater root dry mass and aerial part for cutting development. Therefore, vegetative propagation of Acer palmatum through cuttings is more appropriate with the dissolution of IBA with KOH solvent (66.84% rooting) and formulated substrates CRH and EXCL (1:2 and 2:1, v/v) (66.87% rooting).

Extraction of Rare Earth Elements from Phosphogypsum Using Mineral Acids: Process Development and Mechanistic Investigation

A hydrometallurgical process is developed to leach yttrium, neodymium, and dysprosium from phosphogypsum using three mineral acids, namely, nitric acid, hydrochloric acid, and sulfuric acid over a wide range of conditions. Hydrochloric acid is selected as the best leachant, resulting in 94.6% neodymium and 86.1% dysprosium leaching efficiency under the optimum operating conditions of 45 °C, 2.5 M, and 29.8 mL/g L/S ratio. A systematic investigation using statistical analyses and empirical modeling was performed to determine the best leachant and optimum operating conditions that result in high rare earth element (REE) leaching reported in the literature. Thorough characterization techniques, thermodynamic modeling, and kinetic analysis are utilized to elucidate the leaching mechanism. The results indicate that leaching efficiency is highly correlated with phosphogypsum solubility. The occurrence modes of rare earth elements in phosphogypsum are determined using time-of-flight secondary-ion mass spectrometry (ToF-SIMS), which shows that rare earths are present both as isomorphous Ca2+ substitutions and as separate phases such as oxides and sulfates trapped inside the phosphogypsum crystal. Hence, achieving a high leaching yield requires the destruction of the phosphogypsum lattice through acid attack and dissolution.

3D-Printed Coating of Extended-Release Matrix Tablets: Effective Tool for Prevention of Alcohol-Induced Dose Dumping Effect

Tablets used for extended drug release commonly contain large amounts of drugs. The corresponding drug release mechanism thus has to be well-known and invariable under numerous conditions in order to prevent any uncontrolled drug release. Particularly important is the stability and invariability of the release mechanism in the presence of alcohol due to the possible occurrence of the dose dumping effect. The effect of 3D printing (3DP) coating on the drug release mechanism and the drug release rate was studied as a possible tool for the prevention of the alcohol-induced dose dumping effect. Three types of matrix tablets (hydrophilic, lipophilic, and hydrophilic-lipophilic) were prepared by the direct compression method and coated using 3DP. The commercial filament of polyvinyl alcohol (PVA) and the filament prepared from hypromellose by hot melt extrusion (HME) were used as coating materials. Both coating materials were characterized by SEM, DSC, Raman spectroscopy, and PXRD during particular stages of the processing/coating procedure. The dissolution behavior of the uncoated and coated tablets was studied in the strongly acidic (pH 1.2) and alcoholic (40% of ethanol) dissolution media. The dissolution tests in the alcoholic medium showed that the Affinisol coating was effective in preventing the dose dumping incidence. The dissolution tests in the acidic dissolution media showed that the Affinisol coating can also be useful for the delayed release of active substances.

Static acid dissolution of carbonate outcrops investigated by 1H NMR and X-ray tomography

The success of oil and gas exploration in carbonate reservoirs demands better strategies. Concerning the step of acid stimulation, the understanding of the nature of the carbonate matrices and their response to the acids can contribute for improvements of this process. We report a study about the reactivity of six different carbonate rocks with aqueous solutions of hydrochloric (HCl) and acetic (HAc) acids. The reactivity of the samples was determined by measuring the mass loss of the carbonate samples during the acid dissolution process. The results demonstrate that the dolomitization of the matrices is the main factor to decrease the kinetic of dissolution. Based on visual inspection, and micro-computed tomography, it was observed that the cylindrical outcrops with low dolomitization present different patterns of morphological dissolution upon HCl or HAc. For HCl, homogenous radial dissolution is observed, producing a smooth surface, while for HAc, the radial structure is practically preserved, but the surface become very rough. Concerning the inner effect of the acids, variations on the pore distributions of the outcrops were investigated by micro-computed tomography and pore distribution were observed during the dissolution cycles with the acids. This is an indication that the reaction occurs homogeneously from the surface, with negligible dissolution of the internal pore walls, since no pressure and flow procedures were employed in this study. •Static acid dissolution of carbonate outcrops investigated by time domain Nuclear Magnetic Resonance and X-ray tomography. • Acid stimulation in carbonate improve oil exploration in carbonate reservoirs. • Kinetics of acid dissolution and morphological changes were systematic investigated. • Chemical composition of the matrices is the more relevant parameter to the rate. • The mechanism of rock dissolution is different for HCl and acetic acid.

NUMERICAL SIMULATION OF CARBONATE ROCKS DISSOLUTION NEAR THE WELLBORE

This paper examines the process of wormholes formation during hydrochloric acid treatment of well bottom-hole zone in carbonate formations. An algorithm for solving the problem of wormhole formation in a porous medium for a two-dimensional case was developed. Two-scale model (porescale and Darcy’s scale) taking into account convection, diffusion, and chemical reaction were used in this work in order to describe the dissolution of carbonates with hydrochloric acid (hydrochloric acid treatment). The initial distribution of the porosity field was generated as a distribution of random numbers around some mean value. Based on the distribution of the initial porosity field, the initial permeability field of the rock was calculated. The random distribution was used to describe the heterogeneity of the actual rock. The rest of the study parameters were taken from known experiments on the dissolution of carbonate cores. The numerical model was built for solving the system of equations for acid dissolution, and carbonate dissolution modes with hydrochloric acidwere obtained depending on the Damkohler number, Thiele modulus on the pore-scale and Darcy’s scale as a result of this research. Also, the optimal Damkohler numbers (injection rates) were found. The computer code for the problem of the development/growth of wormholes in a porous medium based on the developed algorithm was built using the C++ programming language.

Enteric and hydrophilic polymers enhance dissolution and absorption of poorly soluble acidic drugs based on micro-environmental pH-modifying solid dispersion

The oral bioavailability of poorly water-soluble active pharmaceutical ingredient (API) is often inadequate for the desired therapeutic effect. Micro-environmental pH-modifying solid dispersion (micro pHm SD) is an effective method for enhancing the dissolution of pH-dependent soluble APIs. However, erratic bioavailability of these drugs was often found when the micro pHm SD of the drugs was orally administrated and passed through the gastrointestinal tract. Because the added alkalizer in micro pHm SD could be neutralized by the acid in the stomach, as a result not enough alkalizer is left to form alkaline micro-environment around the drug in the intestine, leading to poor dissolution and bioavailability of API. Enteric polymers are applicable materials for site-specific drug delivery that are insoluble in gastric tract but soluble in the intestine targeted for drug release. In this study, a poorly water-soluble model drug, toltrazuril (TOL), was prepared as enteric micro pHm SD with enteric, hydrophilic polymers and alkalizer. The surface of enteric micro pHm SD tablets staining and alkalizer protection test in the acid dissolution medium qualitatively and quantitatively confirmed the protective effects of the enteric polymer on the alkalizer. Dissolution studies revealed that the drug release from the enteric micro pHm SDs was improved significantly compared with micro pHm SD with no enteric polymer. The pH-dependent solubility of enteric polymer had effects on the dissolution of APIs from the SDs in neutral medium. Enteric micro pHm SDs with higher proportion of enteric polymer showed higher Cmax and dissolution rate of TOL. The physicochemical characterization and the molecular interaction between drug and matrix were analyzed by electron microscopy (SEM), differential scanning calorimetry (DSC), and fourier transform infrared spectroscopy (FTIR), finding that the formation of hydrogen bonds between TOL and matrix was helpful to promote dissolution of TOL. Ca(OH)2-TOL-PVPk30-HPMCAS 8: 8: 18: 6 was determined as the most optimal enteric micro pHm SD, which significantly improved the bioavailability of TOL and its active metabolism (TOLSO, TOLSO2) in pharmacokinetic study and could effectively reduce the irritation of the gastrointestinal mucosa caused by the alkalizer Ca(OH)2 when the SD was orally administrated to rabbits. The present study demonstrates that formulating APIs with poor water solubility as enteric micro pHm SD is an effective method for protecting the alkalizer in SD and improving the dissolution of APIs and the bioavailability following oral administration.

Influence of milling on structural and microstructural properties of cerium oxide: Consequence of the surface activation on the dissolution kinetics in nitric acid

Ceria (CeO2) is known as a refractory oxide for dissolution in nitric acid, since the leaching reaction is thermodynamically unfavorable, except when it is complexed by nitrates but with very slow kinetics. To enhance dissolution, surface activation was achieved using high-energy milling. With the mechanically-activated cerium oxide, leaching in nitric acid reached 36%. The mechanical activation of the solid caused structural and microstructural changes (particle size, specific surface area, crystallite size, lattice strain, defects…). After one hour, the cleavage induced by energetic milling generated two populations: nanoparticles and grains containing defects like dislocations. Beside crystallite size and micro-strain evaluation using X-ray diffraction, cerium oxidation state was measured by Electron Energy-Loss Spectroscopy (EELS) analyses while linear defects were pictured by Transmission Electron Microscopy (TEM) observations. On one hand, it was found that the nanoparticles formed during milling process greatly enhance the dissolution reaction by the creation of Ce3+ thin layers of a few nanometer depth on their surfaces. On the other hand, it is shown that dislocations represent another way to increase the kinetics by activation energy. In conclusion, dissolution rate's growth can be due to different parameters like the leaching of the smallest particles, the presence of reduced oxidation state on nanoparticles and some highly reactive sites concentrating structural defects such as dislocation nodes. Finally, as ceria is also well known to be a safe analogue of PuO2, especially for dissolution studies, a solution for improving the dissolution of ceria would probably also be useful for dissolving the oxides rich in Pu.

High-tensile regenerated cellulose films enabled by unexpected enhancement of cellulose dissolution in cryogenic aqueous phosphoric acid

We have demonstrated, for the first time, high-efficient non-destructive and non-derivative dissolution of cellulose could be achieved in cryogenic aqueous phosphoric acid. Cellulose from different sources and of varying degree of polymerization from 200 (MCC) to 2200 (cotton fabric) could be dissolved completely to afford solutions containing 5 wt%–18 wt% cellulose, from which ultra-strong and tough cellulose films of tensile strength as high as 707 MPa could be obtained using water as the coagulant. These solutions can be stored at −18 °C for extended time without noticeable degradation while desired degree of polymerization is also attainable by tuning the storage conditions. The findings of this work call for renewal attention on phosphoric acid as a promising cellulose solvent for being non-toxic, non-volatile, easy to handle, and cost-effective.

Improved borate fusion technique for determination of rare earth elements in electronic waste components

ABSTRACT The information regarding the abundance of rare earth elements (REEs) in electronic waste components (EWC) helps the recycling industry. However, after the end of use, improper disposal may be detrimental to the environment by releasing toxic substances. An optimised alkaline borate fusion method for REEs determination in electronic waste (e-waste) was developed. It is divided into three phases. Firstly, the sample preparation stages were investigated. Secondly, the optimisation of experimental particulars comprises the choice of oxidiser, flux composition, non-wetting agents, fusion time, and sample to flux ratio. The third phase consists of spectroscopic determination by inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray fluorescence (XRF) spectroscopy. The highest REEs recovery (mg/g of e-waste) were found more in fine fractions of less than 0.09 mm compared to gross fractions. The optimum and safe fusion conditions for e-waste were achieved after slow thermal decomposition up to 550°C, pulverisation to 90% of –53 µm, flux composition (90%LiBO2 + 10% Li2B4O7), 3:1 oxidant ratio of Na2CO3: NaNO3, LiBr as the non-wetting agent. Also, a sample to flux ratio of 1:15 and a total fusion time of 10 min was optimised. The newly improved alkaline fusion results compared better to those obtained from classical mineral acid dissolution with at most 5% RSD on REEs studied. The alkaline borate fusion results in smartphones e-waste were at least 15% and 25% higher than in four acid digest and microwave-assisted digest techniques, respectively. The results indicated enrichment of REEs in smartphones followed by non-smartphones and computer waste.

Influence of alkaline pre-treatment on acid dissolution of cathode material of 18650 lithium battery

Lithium battery cathodes contain lithium, cobalt, nickel, and manganese. Recycling of spent lithium batteries aims to recover these elements for re-use. Liberation of cathode materials from other metals in the battery such as aluminium, copper, and iron, is essential to obtain a good leaching efficiency in the recovery of valuable metals from end-of-life lithium batteries. This study investigates the behaviour of cathode materials and other metals in spent 18650 lithium batteries during leaching in H2SO4 solution with and without NaOH pre-treatment. Dissolution of aluminium using NaOH is a selective method to separate the metal from other elements. The influence of a 2-hour NaOH pre-treatment on subsequent acid leaching of cathode materials was investigated at both room temperature and 80°C. The extraction of aluminium increased to 75% at a higher temperature. Lithium concentration in the pregnant leach solution from acid leaching also increases with NaOH pre-treatment. The pre-treatment had a negligible effect on nickel, manganese, iron, and copper extraction. However, the cobalt extraction with NaOH pre-treatment was significantly lower. The result was likely due to indirect impact of less hydrogen gas was generated from a lower Al amount. The lattice structure of the leach residue for the sample with NaOH pre-treatment was monoclinic rather than rhombohedral due to stronger delithiation.

Pure Gold Dissolution and Stainless-Steel Corrosion in Dilute Nitric or Nitrous Acid Containing Halide Salts

Pure Gold Dissolution and Stainless-Steel Corrosion in Dilute Nitric or Nitrous Acid Containing Halide Salts

Application of Rietveld refining method for the production of geopolymeric binders

The activated alkaline materials constitute a group of eco-efficient binders. For materials with a low calcium content, excess free sodium in the alkaline activation process results in efflorescences that weaken the matrix. The excess of free sodium occurs due to failures in the quantification of the reactive fraction consumed by the alkaline activation reactions. The present work compares the conventional dosage methods with the method used by the Rietveld refinement, based on the application of the external standard (EP). To determine the amorphous phase content in the materials, chemical (XRF) and mineralogical (XRD) analyzes were performed on metakaolin and silica fume. The formulations were then dosed using both methods, the molar ratios of Na2O/Al2O3 and SiO2/Al2O3 varying between 0.8 and 1.4. and 3.3–3.6, respectively. The activated alkaline matrix dosed by the EP method exhibited mechanical resistance approximately twice as high as that dosed by the conventional method. The formulation EP-3.6–1.0 showed greater mechanical strength, in addition to high resistance to dissolution in hydrochloric acid (52% of the material remained indissoluble). The optimal SiO2/Al2O3 and Na2O/Al2O3 molar ratios were equal to 3.6 and 1.0, respectively, approaching works that used precursors with a high degree of amorphism.

Determination of Carbonate Concentrations in Calcareous Soils with Common Vinegar Test

Calcareous soils are those that have free calcium carbonate (CaCO3) and have pH values in the range of 7.0 to 8.3. If they are managed properly, calcareous soils can be used to grow any crop. Before employing any management practices, it is important to know how much carbonate exists in the soil. Soil carbonate is usually quantified by acid dissolution followed by the volumetric analysis of the released carbon dioxide (CO2). In geological sciences, a simple acid test consists of placing a drop of dilute hydrochloric acid on a rock or mineral and observing if there are CO2 bubbles released; the bubbles indicate the presence of carbonate minerals. The household test below uses vinegar and other simple instruments to estimate soil carbonate concentration. Minor revision with an added author.

Acid Dissolution Behavior of Ferritic FeCrAl Tubes Candidates for Nuclear Fuel Cladding

The international materials community is engaged in finding safer alternatives to zirconium alloys for the cladding of fuel in light water reactors. One solution is to replace the zirconium cladding using ferritic iron-chromium-aluminum (FeCrAl) alloys, which offer extraordinary resistance to high-temperature reaction with air or steam due to the formation of a protective alumina layer on the external surface. It is important to characterize the behavior of FeCrAl not only during accident conditions but in the entire fuel cycle, which may include reprocessing of the used fuel after it is removed from the power reactors. The reprocessing may involve the dissolution of the fuel rods in mineral acids. Little or nothing is known on the dissolution of FeCrAl alloys in common mineral acids, therefore the objective of this research was to study the dissolution of typical cladding tubing having two compositions of FeCrAl (APMT and C26M) in three acids (H2SO4, HNO3, and HCl) as a function of the temperature using both standard ASTM immersion tests as well as electrochemical tests. The dissolution behavior of the FeCrAl alloys is compared to the dissolution capability of other traditional nuclear materials such as austenitic stainless steels (304SS and 316SS) and austenitic nickel alloys (Alloy 600 and Hastelloy C-276). Results show that both C26M and APMT have a higher dissolution capability in the studied mineral acids, which will be beneficial for reprocessing procedures.

Exploring the coupling relationship between hydrocarbon generation of continental shale and nanopore structure evolution\u2014A case study of Shahejie formation in Bohai Bay Basin

The nano-scale pore structure of shale is closely related to the self-generated and self-accumulated shale oil and gas. The Bohai Bay Basin is a crucial oil-bearing basin in eastern China, and the Paleogene Shahejie Formation is the most important source rock section in this area. In order to study the internal relationship between hydrocarbon generation evolution and pore structure characteristics of source rocks, we conducted hydrocarbon generation simulation tests with a closed gold tube system, and heated up original rocks from Shahejie Formation in Laizhou Bay Sag, southern Bohai Bay Basin, from 290 °C to 440°C at different heating rates. Besides, we carried out low-temperature N2 adsorption experiments on sample residues, and measured their pore structure characteristic parameters. The results show that with the increase of simulated temperature, the specific surface area and pore volume of nano-pores below 10 nm (which are mainly organic pores) decrease first and then increase, while those of nano-pores above 10 nm increase all the way. The evolution trend of total specific surface area and pore volume is mainly controlled by pores below 10 nm which are mainly organic pores, especially micropores below 2 nm. There are two main factors affecting the development of inorganic pores: (1) Dissolution of organic acids produced by pyrolysis of organic matter in hydrocarbon-generation evolution; (2) Deformation of crystal structure of mineral components under the combined action of temperature and pressure. The experimental results at different heating rates demonstrate that rapid settlement under geological conditions is not conducive to the development of nano-pores, especially micro-pores composed of organic pores.

Water Chemical Characteristics and Influence of Exogenous Acids in the Yangtze River Basin

To explore the influence of human activities on the Yangtze River water chemistry, water samples were obtained from a representative section the main river stem/branch in wet and normal seasons in 2016. Ion ratio analysis, principal component analysis(PCA), and chemical ion balance calculations were performed, and carbonate rock dissolution rates were determined based on carbonate and exogenous acids. The result show that HCO3-Ca is the dominant hydrochemistry type, indicating that the dissolution of carbonate rocks in the basin is the main process affecting hydrochemistry, and carbonate acid is significant in the weathering of carbonate rocks. In addition, the proportion of carbonate acid dissolution in the wet and normal seasons accounted for 60.33% and 59.14% of the total dissolution, respectively. The dissolution ratio among the different sampling points was notable, which indicates that the carbon sink effect of exogenous acid cannot be ignored. In addition, cation exchange some influence on hydrochemistry but was not the main reaction process. Compared with hydrological monitoring data for the last few years, the weathering of rocks by sulfuric and nitrate acids has strengthened, and the negative effects of anthropogenic pollution in the Yangtze River have increased.

Purification of Crude Sodium Di-Uranate from Tummalapalle Source, India to Nuclear Grade Ammonium Di-Uranate Using Sulphamic Acid Dissolution Route

Crude Sodium Di-Uranate (SDU) of Tummalapalle mine India, contains 2-3% (w/w) of silica besides 5-7% (w/w) of organic matter including polyacrylamides and humic masses with 2-5% Zirconium (Zr) (w/w) as major impurities, hence the direct conversion of SDU, to Nuclear Grade (NG) Ammonium Di-Uranate Cake (ADUC) for
 fuel fabrication via HNO3-Tributyl Phosphate (TBP) extraction route is onerous due to silica gel creation, third phase inception enounces presence of excess Zr and micro-emulsion formation confirms organic matter introduces difficulties in filtration, recovery and purification stages. Various analytical techniques such as X-Ray Diffraction Analysis (XRD), Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR) as well as Inductively Coupled Optical Emission Spectrometer (ICP-OES) has been utilized to characterize raw material (SDU), intermediate products (gel and residues) as well as final product (NG-ADUC). In this research; an innovative, novel route for dissolution of SDU employing sulphamic acid (25% w/v) to remove silica, organic matter, and Zr followed by the conventional route to NG-ADU; eliminates the three major process difficulties viz., (i) gelation, (ii) third phase formation and (iii) microemulsion formation. In addition, sulphamic acid extracted Uranium (U)-bearing stream ultimately articulates 99.5% overall U recovery and enunciates nuclear grade U with desirable morphological characteristics.