Sodium Tungstate Research Articles

Reaction of 5-(Arylmethylidene)-2,4,6-pyrimidine2,4,6(1H,3H,5H)-triones with Morpholine N-Oxide

The reaction of 5-(arylmethylidene)-2,4,6-pyrimidine-2,4,6(1H,3H,5H)-triones with morpholine in the presence of hydrogen peroxide and catalytic amounts of sodium tungstate leads to the synthesis of 2-aryltetrahydro-1'H,2H-spiro(isoxazole[3,2-c][1,4]oxazine-3,5'-pyrimidine)-2',4',6'(3'H)-triones.

Study of a Hydrogen Inhibition Method with Sodium Tungstate for Wet Aluminum Dust Removal Systems

Hydrogen, which can be produced due to the accumulation of aluminum dust that reacts with water in wet dust removal systems, is a fire and explosion hazard. To reduce hydrogen production, sodium tungstate is used in hydrogen inhibition experiments to inhibit the reaction between aluminum dust and water. The purity of the aluminum powder was 95.15%, analyzed with X-ray fluorescence spectrometry (XRF). Each of the hydrogen inhibition experiments lasted for 12 h. In addition, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology and composition of particles before and after the experiments. There was nearly no hydrogen produced when the concentration of the sodium tungstate solution reached 100 g/L. The results show that a protective coating containing W element was formed on the surface of the aluminum particles after the reaction with sodium tungstate, and the coating prevented the aluminum particles from contacting with water.

The role of ABA in the responses of wild-type and abscisic acid mutants of Arabidopsis thaliana to excess zinc

To explore the function of endogenous abscisic acid (ABA) in answer to excess zinc (Zn), calli from Arabidopsis (Arabidopsis thaliana) mutant lines, abi1-1 (ABA insensitive) and aba1-1 (with reduced level of ABA), and their associated wild-type (Landsberg erecta, Ler) were used. Excess Zn resulted in oxidative damage characterized by ion leakage, malondialdehyde (MDA), and hydrogen peroxide (H2O2) accumulation, and relative cell viability decrease in Arabidopsis calli. ABA-deficient mutant (aba-1) callus suffered more serious oxidative damage in comparison with wild-type (Ler) callus. Sodium tungstate, an ABA synthesis inhibitor, aggravated excess Zn-induced ion leakage, H2O2 and MDA accumulation in wild-type and aba1-1 mutant calli. Also, sodium tungstate obviously suppressed proline production and ascorbate peroxidase (APX) activity whereas promoted lipoxygenase (LOX) activity in wild-type and aba1-1 mutant calli in the presence of excess Zn. Instead, exogenous ABA treatment significantly elevated proline concentration and APX activity and inhibited LOX activity and thus alleviated excess Zn-induced ion leakage, H2O2 and MDA accumulation, and relative cell viability decrease in wild-type and aba-1 mutant calli. Moreover, no significant effects of sodium tungstate or exogenous ABA application on calli derived from abi1-1 mutant were observed under excess Zn. Endogenous ABA might function as a signal in exciting antioxidases and proline accumulation and thus protect against toxicity induced by excess Zn.

Self-assembly of a nanoscale penta-cerium(III)-bridged selenotungstate: Synthesis, crystal structure and properties

The reaction of sodium tungstate, sodium selenite, and cerium nitrate under reasonably acidic water solution in the presence of morpholine gives rise to a penta-CeIII-bridged polyoxotungstate, Na10(C4H10NO)10[Ce5Se4.75W34O128(OH)2(H2O)14]·21H2O (1), which is a rare example of selenotungstate featuring novel Keggin {SeW8} building blocks. This cluster is fully characterized by single crystal X-ray diffraction, elemental analyses, powder X-ray diffraction (PXRD), infrared spectrum (IR), ultraviolet–visible spectroscopy (UV/Vis), thermogravimetric/differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS) and electrospray ionization mass spectrometry (ESI-MS). Single-crystal X-ray diffraction analysis reveals that four {SeW8} are bridged by multi-Ce linkers and two equal “trans”-{WO6} centers resulting in this tetramer. The utilization of Ce cations and SeIVO32− heteroanion template as well as some determined assembly rules during the synthesis play important roles in the formation of 1. Additionally, its solution stability and electrochemical performance were also discussed in detail.

Tungstate-Catalyzed Biomimetic Oxidative Halogenation of (Hetero)Arene under Mild Condition.

SummaryAryl halide (Br, Cl, I) is among the most important compounds in pharmaceutical industry, material science, and agrochemistry, broadly utilized in diverse transformations. Tremendous approaches have been established to prepare this scaffold; however, many of them suffer from atom economy, harsh condition, inability to be scaled up, or cost-unfriendly reagents and catalysts. Inspired by vanadium haloperoxidases herein we presented a biomimetic approach for halogenation (Br, Cl, I) of (hetero)arene catalyzed by tungstate under mild pH in a cost-efficient and environment- and operation-friendly manner. Broad substrates, diverse functional group tolerance, and good chemo- and regioselectivities were observed, even in late-stage halogenation of complex molecules. Moreover, this approach can be scaled up to over 100 g without time-consuming and costly column purification. Several drugs and key precursors for drugs bearing aryl halides (Br, Cl, I) have been conveniently prepared based on our approach.

Syntheses and pharmacokinetic evaluations of four metabolites of 2-(4-(2-((1H-benzo[d]imidazol-2-yl)thio)ethyl)piperazin-1-yl)-N-(6-methyl-2,4-bis-(methylthio)pyridin-3-yl)acetamide hydrochloride [K-604], an acyl-CoA:cholesterol O-acyltransferase-1 inhibitor

We synthesized and identified four metabolites of acyl-coenzyme A:cholesterol O-acyltransferase (ACAT)-1 inhibitor, K-604 (1). Two of the metabolites M1 and M2, were prepared from 1 using a combination reagent of hydrogen peroxide and sodium tungstate with either phosphoric acid or trifluoroethanol as the solvent to control the regioselectivity. Upon exposure of 4b to tert-butyl hypochlorite at −78 °C, the monosulfoxidation afforded synthetic intermediate of M3 in excellent yield. The efficient synthesis of M4 was established. The in vitro metabolic study exhibited a high clearance value (720 μL/min/mg protein) of 1 using human liver microsomes. We orally administered a single dose of 10 mg/kg of 1 to monkeys because the in vitro metabolic patterns are quite similar. Fortunately, the drug concentration of 1 was much higher than those of M1, M2, M3 and M4.

Interfacial Growth of Activated Carbon on WO3 Nanoplates for Enhanced Photocatalytic Activity by Surface Plasmon Resonance

A highly efficient, visible-light-driven and hybrid-activated carbon-doped pure tungsten trioxide (WO3) composite photocatalyst, with greatest stability has been synthesized by using hydrothermal method. Carbon nanoparticles were prepared by using sugarcane bagasse, and tungsten trioxide was prepared by using sodium tungstate (Na2WO4·2H2O) as a starting material. This study considers the photo-degradation of paracetamol by photocatalysis process, under visible-light irradiation. To study the properties of the prepared materials, SEM, TEM, FTIR, PL, and UV were performed. SEM was used to find the structure and size of the prepared materials. FTIR was used to analyze the presence of functional groups in the material. PL and UV were used to analyze the optical properties of the prepared materials. The SEM images of the prepared sample of WO3 showed that it has structure-like nanocubic and rectangular rods which become sharper by addition of carbon nanoparticles. The average size of the nanorods was about 50–550 nm. Some of the nanorods have smaller sizes about 25–250 nm which became beneficial for the photo-degradation process. UV–Vis spectroscopy showed that the band gap of the prepared samples varied from 2.78 to 2.26 eV, and this variation of the band gap was due to the variation in the concentration of the carbon nanoparticles. PL-spectroscopy analyzed the excitation wavelength of the prepared sample which was 448 nm. The efficiency of the prepared samples was evaluated by using paracetamol as target pollutant; carbon-doped composites of WO3 showed a greater photocatalytic performance as compared with the pure WO3. From the results of the photocatalytic activity, it was clear that composite having 2% carbon has the highest efficiency to degrade the paracetamol.

One-pot facile sol-gel synthesis of W, N, C and S doped TiO2 and its application in the photocatalytic degradation of thymol under the solar light irradiation: Reaction kinetics and degradation mechanism

The ions W6+, N3−, C4+ and S6+ were incorporated into TiO2 lattice (WNCST) by sol-gel method. Sodium tungstate and l-cysteine were the precursors for these dopant ions. Energy dispersive X-ray studies confirmed the stoichiometry of the WNCST samples. Powder X-ray diffraction studies confirmed the anatase structure for TiO2, W6+-doped TiO2 and WNCST samples. The preferential sites for the occupation of dopant ions in the TiO2 lattice, the oligomeric octahedral chain growth mechanism and the mechanism of retention of anatase phase in the WNCST photocatalysts was explained in detail. The WNCST samples showed extended absorption in the visible region due to the creation of various dopant/defect energy levels. The plot of crystal density versus dopant concentration implied that the WNCST samples were omission solid solutions containing various defects such as neutral/ionized vacancies of Ti and O. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed the presence of carbonate and sulfate groups on the surface of WNCST samples. Photoluminescence confirmed the optimum dopant concentration of cysteine as 0.17 mol %. The enhanced visible light photocatalytic activity of WNCST samples was mainly attributed to extended light absorption in the visible region due to the presence of 5d energy levels of W6+ ions and 2p states of S6+ and N3− dopant ions, surface adsorbed electron withdrawing sulfate groups and surface adsorbed carbonaceous content acting as a sensitizer. The thymol degradation reaction intermediates were identified using high performance liquid chromatography, UV–visible absorption spectroscopy and gas chromatography-mass spectrometry.

Efficient esterification reaction of palmitic acid catalyzed by WO3-x/mesoporous silica

Different solid catalysts were prepared by impregnation of tungsten species on commercial mesoporous silica. The resulting materials were characterized in order to elucidate their composition, properties and acidity. Moreover, the catalytic results were carefully studied, in an attempt to reach insights about the catalytic active species involved in the investigated reactions. The obtained solids were nominated Q15W-X, where X = 1 means an impregnation using ammonium paratungstate (APT), X = 2 sodium tungstate (Na2WO4) and X = 3 tungstic acid dihydrate (W-2) as tungsten source. They were evaluated as catalysts towards the esterification of palmitic acid by methanol, the average conversion was found to be between 80 and 90% and the catalysts were reused in four more reaction cycles, keeping similar conversion results as in the first use. The spectroscopic analyses suggested that the formation of polytungstate species over the silica with different tungsten species, mainly W5+ and W6+ is probably influence the esterification under mild conditions. Such species are not present in the solid resulting from the impregnation of W-2 on glass beads (GB) and the solid WO3 obtained by the calcination of W-2 (WO3-C), which presents poor catalytic activity and are mostly constituted by monoclinic WO3.

Modification of polyvinyl chloride ion-selective membrane for nitrate ISFET sensors

In this work, a Polyvinyl Chloride (PVC) ion-selective membrane was modified to detect nitrate based on Ion Selective Field Effect Transistor (ISFET) sensing technology in order to eliminate chloride interference. A modification was done with ethylenediamine solution to achieve animated PVC, which was then oxidized with sodium tungstate to form nitrone coated PVC membrane. The modified PVC was characterized using FTIR, 1H NMR, GPC, FE-SEM and EIS. The FTIR spectrum of animate PVC demonstrated -NH2 bending at 1580 cm−1, NO2 asymmetric stretching at 1650 cm−1 and NO out-of-plane deformation vibration at 837 cm−1. GPC analysis of the modified PVC showed that the PVC molecular weight was shifted to a high molecular weight. The PVC ion-selective membrane was immobilized on the ISFET to create nitrate sensors with the following characteristics. The Nitrate-Nitrogen detection limit is 1.20 ppm with linear range from 3−20 ppm at sensitivity of 56 ± 2 mV/dec. The sensor is useful for detecting small amount of nitrate in a mixed solution, which usually is the case in most situations. This sensor could be applied in many applications, such as agricultural industry, water reserve management and medical field as well.

Recent Developments in the Recycling of Spent Selective Catalytic Reduction Catalyst in South Korea

Spent selective catalytic reduction (SCR) catalyst installed in power and incineration plants is used to convert nitrogen oxide (NOx) gas to nitrogen (N2) gas. Currently, most spent SCR catalyst in South Korea is eventually discarded in landfills. Recently, a novel and efficient recycling process has been developed to recover tungsten (W), vanadium (V) and titanium (Ti) from spent SCR catalyst. In this process, after soda-melting reactions between the spent SCR catalyst and sodium carbonate (Na2CO3) at 1273 K, hydrometallurgical treatments were carried out for the production of high-purity products, such as 99.3% sodium tungstate (Na2WO4), 99.3% vanadium oxide (V2O5) and 99.6% titanium dioxide (TiO2). On the basis of the fundamental investigation of this novel recycling process, process scale-up has been attempted to establish a commercial process. In this paper, recent developments in the recycling process for spent SCR catalyst and the results obtained using the scaled-up process will be discussed. Therefore, this study will provide a practical method for the recovery of W, V and Ti from spent SCR catalyst.

Effects of root abscisic acid on Na+ transport and photosystem 2 in Helianthus tuberosus under salt stress

The effects of root abscisic acid (ABA) signal on Na+ transport and photosystem 2 (PS2) in Jerusalem artichoke (Helianthus tuberosus) under salt stress (150 mmol·L-1 NaCl) were examined by applying ABA synthesis inhibitor sodium tungstate to roots. Sodium tungstate inhibited ABA synthesis in roots, reduced root Na+ efflux, and increased the efficiency of Na+ transport from roots to leaves under salt stress. Salt stress increased leaf Na+ content and did not affect leaf membrane lipid peroxidation, PS2 reaction center protein and PS2 maximum photochemical efficiency (Fv/Fm ). The inhibition on root ABA synthesis significantly increased leaf Na+ accumulation, aggravated leaf membrane lipid peroxidation, impaired PS2 reaction center protein, decreased Fv/Fm, and induced PS2 photoinhibition. In conclusion, root ABA signal was beneficial to reducing leaf Na+ accumulation and preventing PS2 oxidative damage by inducing root Na+ efflux and inhibiting Na+ transport to the aerial part in H. tuberosus under salt stress.

Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid.

Nitric oxide (NO) and abscisic acid (ABA) are important regulators of plant response to cold stress, and they interact in response to cold signals. The primary goal of this study was to determine the roles of exogenous NO and ABA on the synthesis of endogenous NO and ABA in cold-stored peach fruit. Exogenous NO and ABA maintained a relatively high content of NO, increased nitrate reductase (NR) activity, and inhibited the activity of NO synthase (NOS)-like and the levels of polyamine biosynthesis in peaches during cold storage. Treatments of potassium 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (c-PTIO), NO, N-nitro-l-Arg-methyl ester (L -NAME), and sodium tungstate did not influence ABA content. Exogenous ABA increased the content of carotenoids and the activities of aldehyde oxidase (AO), 9-cis-epoxycarotenoid dioxygenase (NCED), and zeaxanthin epoxidase (ZEP) of ABA synthesis in peaches during cold storage, and upregulated the gene expression of PpAO1, PpNCED1, PpNCED2, and PpZEP. The production of endogenous NO was differentially inhibited by NO scavengers, ABA inhibitors, and NR inhibitors, but not affected by NOS-like inhibitors during cold storage. Exogenous NO and ABA can induce endogenous NO synthesis in cold-stored peaches by the nitrate reductase pathway, and ABA can mediate endogenous ABA synthesis by the autocatalytic reaction. NO does not regulate ABA synthesis. © 2019 Society of Chemical Industry.

Investigation of Beta Radiation Absorption Properties of Tungstate and Molybdate Doped Wallpapers

It is very important that the shielding material used in radiation treatment and imaging centers can effectively protect against radiation and that this material is cost-effective. Therefore, studies are underway on the development of different types of shielding materials. In this study, radiation absorption properties of sodium tungstate (Na2WO4) and sodium molybdate (Na2MoO4) coated wall papers were investigated. The beta radiation absorption properties of these elements which are applied on wall papers in different densities (100% precipitated calcium carbonate (PCC), 2.5 g, 5 g, and 7.5 g amounts of Na2WO4 and Na2MoO4 and various thicknesses (0.172-0.258 mm) were investigated. The wallpapers were irradiated with 4 MeV-energized electrons and measurements were taken with the PTW brand electron detector. The linear absorption coefficients of the wallpapers were obtained and half value layer (HVL) and one-tenth value layer (TVL) were calculated from these results. According to the results, it is observed that the beta radiation absorption properties of these wallpapers increase as the density of Na2WO4 and Na2MoO4 increases and as the coating thickness increases in the coating materials used to cover the surface of the wallpapers.

Honeycomb Texturing of Hierarchical Nanoflowers of WO3as an Efficient Route to Improve Repeatability and Stability of Room Temperature Vapor Sensor

Hierarchical nanostructures of WO3 was synthesized by a hydrothermal method at 180°C using sodium tungstate dihydrate (Na2WO4.2H2O), sodium bisulfate dihydrate (NaHSO4.2H2O) and ethylene glycol (having different molar concentrations) with Titanium as the substrate. Molar concentrations of ethylene glycol was taken to be 2.241 M, 8.274 M and 15.693 M, which eventually produced, (i) nanoneedles with sparsely distributed nanosphere clusters (S-I) (ii) nanospheres (S-II) (iii) honeycomb textured hierarchical nanoflowers (S-III), respectively. After detailed morphological and structural characterizations, like field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), these different nanostructures were employed as the gas sensing layer targeting the alcohol vapors in the concentration range of 10–400 ppm over a temperature range of 27°C (room temperature) to 200°C. Among the hierarchical nanoforms, S-III offered the best sensing performance in terms of response magnitude (~29.35%/~91.59%), response time (~31 s/~19 s) and recovery time (~42 s/~27 s), for 10/400 ppm ethanol at 27°C. Moreover, improved stability and repeatability were also achieved by the same structure. Such improvement in the sensing performance was duly correlated with the corresponding morphology of the nanostructure employing a semi-quantitative geometrical model.

Tungsten sodium phosphate glasses doped with trivalent rare earth ions (Eu3+, Tb3+, Nd3+ and Er3+) for visible and near-infrared applications

Tungsten-phosphate glasses doped with different rare earth ions (Er3+, Eu3+, Nd3+ and Tb3+) were obtained by the conventional melt-quenching technique. At high amounts of tungsten oxide (>50 mol%), the tungsten-phosphate glasses are only translucent due to reduced W5+ species. However, the transparency of the glasses is significantly increased by the addition of Sb2O3 - as an oxidating agent which promotes the conversion of W5+ into W6+. FTIR spectra allowed identification of absorption bands corresponding to phosphate structural groups and tungsten units in the 500–1300 cm−1 spectral region. The optical absorption, luminescence excitation and emission spectra were collected and Judd-Ofelt analysis was carried out for selected samples. It is observed that by increasing the amount of WO3, the lifetime of the Er3+ NIR emission increases as well as the branching ratio of Eu3+ emission band at 610 nm, respectively, due to lowering of the average phonon energy of the glassy system and increasing of the site asymmetry around the rare earth ions. Details on the photophysics of these glasses, including upconversion and the analysis of radiative properties via Judd-Ofelt calculations are given and discussed as a function of structural variations and dopant ion concentrations.

Abscisic Acid Promotes Jasmonic Acid Accumulation and Plays a Key Role in Citrus Canker Development.

Antagonism between jasmonic acid (JA) and salicylic acid (SA) plays pivotal roles in the fine-tuning of plant immunity against pathogen infection. In this study, we compared the phytohormonal responses to Xanthomonas citri subsp. citri (Xcc) between the citrus canker-susceptible (S) cultivar Wanjincheng orange (Citrus sinensis Osbeck) and -resistant (R) cultivar Jindan (Fortunella crassifolia Swingle). Upon Xcc infection, SA and JA were strongly induced in Jindan (R) and Wanjincheng orange (S), respectively, and JA appeared to contribute to citrus disease susceptibility by antagonizing SA-mediated effective defenses. A homologous gene encoding the allene oxide synthase (AOS) 1-2 enzyme, which catalyzes the first committed step in JA biosynthesis, was specifically upregulated in Wanjincheng orange (S) but not in Jindan (R). A promoter sequence analysis showed that abscisic acid (ABA)-responsive elements are enriched in the AOS1-2 of Wanjincheng orange (S) but not in Jindan (R). Accordingly, ABA treatments could induce AOS1-2 expression and JA accumulation, leading to enhanced citrus disease susceptibility in Wanjincheng orange (S), while the synthesis inhibitor sodium tungstate had the opposite effects. Moreover, ABA was specifically induced by Xcc infection in Wanjincheng orange (S) but not in Jindan (R). Thus, Xcc appeared to hijack host ABA biosynthesis to promote JA accumulation, which in turn suppressed effectual SA-mediated defenses to favor disease development in citrus. Our findings provide new insights into the molecular mechanisms underlying the differential citrus-canker resistance in citrus cultivars, and a new strategy for the biotechnological improvement of citrus canker resistance was discussed.

Investigation of structure, microstructure, impedance, dielectric and transport properties of sodium tungstate titanate: Na(W1/2Ti1/2)O3

In this communication, the detailed studies of structure, microstructure, impedance, dielectric and transport properties of the distorted perovskite sodium tungstate titanate(Na(W1/2Ti1/2)O3) have been reported. X-ray structural analysis confirms the formation of a single-phase rhombohedral structure. The comprehensive investigations of dielectric, impedance, electric modulus, conductivity and leakage current characteristics of Na(W1/2Ti1/2)O3 have been carried out in a wide range of frequency (1 kHz to 1 MHz) and temperature (25° to 500°C). The Maxwell-Wagner interfacial polarization is found to be responsible for the high dielectric constant and low tangent loss at low frequency (∼1 kHz). The electrical process of the material is mostly dependent on the grains and grain boundaries contributions. The study of electrical transport (conductivity) reveals that the compound (Na(W1/2Ti1/2)O3) obeys the Jonscher’s power law. From the study of the leakage-current characteristics, it can be concluded that the compound has low-leakage current indicating a good insulation property which is useful for some device applications.

Green synthesis of f-CdWO4 for photocatalytic degradation and adsorptive removal of Bismarck Brown R dye from water

Cadmium tungstate, CdWO4, is well-known semiconducting material which exhibit good photocatalytic properties but its preparation is usually carried out at very high temperature. Hardly any report is available for its preparation through green route, and its application for water treatment. Therefore, the functionalized cadmium tungstate, f-CdWO4, nanoparticles synthesis through green, environmentally benign route using Brassica rapa leave extract and sodium tungstate and cadmium iodide was objective of the present work. The formation of f-CdWO4 was confirmed from FT-IR, XRD, and TEM, SEM and UV/Visible spectroscopic techniques. The average size of the particles was 54 nm as calculated from the XRD analysis, 37.23 nm radius was determined from UV–Visible spectrum, whereas average 27 nm breadth and 120 nm length was found from TEM imaging showing rod shaped f-CdWO4 nanoparticles. The f-CdWO4 was used for removal of toxic Bismarck brown R dye from aqueous solution through adsorption and photocatalytic degradation under sun light irradiation. The coloured water containing 10 mgL−1 concentration of dye could be cleaned with 1.5 gL-1 dose of f-CdWO4 at optimum condition. The adsorption capacity of f-CdWO4 for Bismarck brown R was found to be 46.5, 49.50, and 51.54 mgg−1 at 30, 40 and 50°C, respectively. The endothermic adsorption of Bismarck brown R followed pseudo-second order kinetics. The interaction between f-CdWO4 and Bismarck brown R, on molecular level, was investigated from FT-IR studies clubbed with isotherm, kinetics, and thermodynamics. The f-CdWO4 also showed good photocatalytic degradation activity and degraded 82.70% of Bismarck brown R in 50 mL solution having 20 mgL−1 dye concentration, with 1.5 gL-1 dosage of f-CdWO4. Therefore, f-CdWO4, prepared through green route, would be efficient for water treatment through both photocatalytic and adsorption activities.

Combustion Characteristics of Plant Chemical Polyol Waste Liquor in a Pilot Water-Cooled Incinerator

In the production of plant chemical alcohol, a large amount of salty high-concentration organic waste liquid is by-produced, in which a large amount of high-value sodium tungstate and chemical heat energy are contained. Through the design of the pilot water-cooled incinerator, the operating parameters and the characteristics of alkali ash deposition of the waste incinerator were tested. The pilot incinerator is a natural-cycle steam boiler, has a full water-cooled II-type structure, with liquid slag discharge, and the furnace design has selected reasonable volumetric heat load and flue gas residence time. Combustion distribution is the core parameter affecting the combustion of waste liquid. Studies have shown that increasing the primary air rate and the excess air coefficient are beneficial to improve the combustion performance of waste liquid, increase steam production, and reduce CO and SO2 emissions in flue gas, but also increase the concentration of NO. When the excess air ratio was 1.2, and the primary air ratio was 0.65, the NO concentration in the tail flue gas was less than 10 ppm, and the SO2 concentration was zero. The TG-DTA method measured that when the alkali ash melting temperature was less than 587 °C, the alkali ash had strong adhesion in the high temperature zone of the incinerator and less deposition in the low temperature region of the tail. The alkali ash deposition rate and relative deposition rate were used to quantitatively study the characteristic of alkali ash deposition.