Different Types Of Solvents Research Articles

Numerical explorations of solvent borne adhesives: a lattice-based approach to morphology formation

The internal structure of adhesive tapes determines the effective mechanical properties. This holds true especially for blended systems, here consisting of acrylate and rubber phases. In this note, we propose a lattice-based model to study numerically the formation of internal morphologies within a four-component mixture (of discrete particles) where the solvent components evaporate. Mimicking numerically the interaction between rubber, acrylate, and two different types of solvents, relevant for the technology of adhesive tapes, we aim to obtain realistic distributions of rubber ball-shaped morphologies—they play a key role in the overall functionality of those special adhesives. Our model incorporates the evaporation of both solvents and allows for tuning the strength of two essentially different solvent–solute interactions and of the temperature of the system.

EFFECT OF SOLVENT AND EXTRACTION TIME VARIATION ON THE COFFEE OIL EXTRACTION RESULTS

The traditional coffee with the greatest taste is called arabica. One of the ingredients made from coffee beans and used for air freshener is coffee oil. The Soxhlet extraction method, a separation technique that is often used to separate one or more compounds from a solid or liquid by adding a solvent, is one of the processes for making coffee oil. This research has been done before, but a comparison of different types of solvents and inclusion of differences in extraction time has not been done. The purpose of this research is to understand how the difference in extraction time and the comparison of solvent types affect the yield, density, and acid number produced. Extraction of hexane and ethanol by distillation for 120 minutes is a research technique. Extraction times were 90, 120, 150 and 180 minutes. In this study, the largest extraction with ethanol solvent was produced within 120 minutes of 25.75%, while the highest percent yield of coffee oil with hexane solvent was obtained within 120 minutes of 17.3%. The maximum specific gravity for 180 minutes with ethanol solvent is 0.94 gr/ml, while for 180 minutes with hexane solvent is 0.91 g/mL. Coffee oil with hexane solvent produced an acid value between 3.2 and 7 mg KOH/g, while coffee oil with ethanol solvent produced an acid value between 4.6 and 11.2 mg KOH/g.

INVESTIGATION OF SOME BIOLOGICAL PROPERTIES OF PROPOLIS IN HAWTHORN VINEGAR EXTRACT

With the determination of the biological activity of different components in the chemistry of propolis, its importance has increased day by day and its use in the field of integrative medicine has become widespread. Propolis is not used in its crude form due to its physical properties, it have to be extracted. The type of solvent used in the extraction process is very important for the efficiency of the biological activity of propolis. Solvents commonly used in propolis extraction; are water, ethanol and methanol. Besides being very easy to extract propolis components using ethanol; extraction of propolis with ethanol creates a usage limit for children, pregnant women and muslim people that don't use alcohol. The limited use of ethanol and the fact that it has some harm to health have led researchers to search for different types of solvents. As a result of these researches, vegetable oils and various vinegars have started to be in the literature as an alternative solvent. In our study, the vinegar of hawthorn fruit, which is rich in flavonoids and has been used in integrative medicine for many years, was used in the extraction of propolis. Solubility of propolis with hawthorn vinegar, physicochemical properties (pH, titratable acidity, ºbrix and color) and bioactive properties (phenolic, flavonoid contents and antioxidant activities) in terms of researched. As a result of the research, it was observed that propolis increased the bioactive properties of hawthorn vinegar. As a result of the research, it was observed that propolis increased the bioactive properties of hawthorn vinegar. It is thought that propolisadded hawthorn vinegar will provide functionality in dishes where vinegar is used today, in salads, and even in foodstuffs such as brine and pickles.

Optical, luminescence, photocurrent and structural properties of sol-gel ZnO fibrous structure thin films for optoelectronic applications: A combined experimental and DFT study

Zinc oxide is an important oxide semiconductor, with excellent physical and chemical properties that are used in different applications fields. In this research paper, ZnO thin films were synthesized using different types of solvent by sol-gel spin coating technique. The effect of solvent on the structural, morphological, photocurrent and optical properties of the films has been studied. X-ray diffraction revealed the high crystallinity of films in the wurtzite structure with a c-axis preferred orientation. SEM micrographs revealed that all films exhibit a fibrous structure, where the more homogeneous and dense surfaces were observed for ZnO-2-PrOH and ZnO–EtOH films. The optical properties analysis shows that the films have high transparency. Different structural and optical parameters were influenced by the type of solvent, where ZnO-2-PrOH film displays an improvement in structural and optical properties. The photoluminescence PL spectrum revealed three emissions, two green emissions and a UV emission at 390 nm. ZnO-2-PrOH film exhibits a high intensity ratio of UV to visible (IUV/Ivis), a best UV response, and photocurrent properties. Finally, structural and optical parameters were also calculated by first-principles DFT calculations, discussed, and compared to those experimental.

Pengaruh Perbedaan Jenis Pelarut Terhadap Kadar Flavonoid Total Ekstrak Daun Sirsak (Annona muricata L.)

One of the plants that is efficacious to prevent a disease is the leaf Annona muricata L. This plant contains contains saponins, terpenoids, steroids, flavonoids, tannins and alkaloids. Compounds that have the most role in causing pharmacological effects are flavonoid compounds as a source of antioxidants. The level of polarity of the solvent in the study will affect the content of the compound extracted based on the principle of like dissolves like. This study was conducted to determine the total flavonoid content at different levels of solvent types and the effect of different solvents of 96% ethanol, ethyl acetate and n-hexane on total flavonoid content. In addition, qualitative tests were carried out to determine the flavonoid compounds. The type of research used is pre-experimental, extraction with controlled maceration method of temperature, light, length of time and stirring. Qualitative analysis with color correction test and Thin Layer Chromatography. Assay using UV-Vis spectrophotometry. The results of the research on identification by color test and Thin Layer Chromatography on the extract Annona muricata L. using 96% ethanol, ethyl acetate and n-hexane as solvents were positive for flavonoids and the results of the determination of flavonoid levels in each solvent were 68,9048 mgQE/g, 97,2381 mgQE /g and 73,6667 mgQE/g. ANOVA statistical analysis in each group had a significant difference with p= <0.001 (<0.05). Flavonoid compounds are influenced by the level of solvent polarity, there are significant differences between treatment groups with different types of solvents on total flavonoid levels. The highest flavonoid content was found in ethyl acetate followed by n-hexane and 96% ethanol.

Perbandingan Metode Maserasi dan Microwave-Assisted Extraction pada Daun Beluntas dengan Variasi Pelarut dan Uji Antioksidan

Beluntas leaves (Pluchea indica L.) as Indonesian herbal plants contain secondary metabolites such as flavonoids. Beluntas leaf parts can be used as medicine. The content of secondary metabolites in Beluntas leaves acts as a natural antioxidant. Beluntas leaf extraction has not been optimal so far. Microwave assisted extraction can increase the yield. This research aims to study the effect of giving different types of solvents of extraction on Beluntas leaves on the levels of flavonoids and the resulting antioxidant activity, and determine the profile of Beluntas leaf extraction results based on comparative trials of the maceration method and MAE (microwave-assisted extraction). This research was conducted in 4 stages: (1) sample preparation of dried Beluntas leaves, (2) extraction by maceration with various types of solvents n-hexane, ethyl acetate, and 70% ethanol, (3) the characteristics of the flavonoid compounds, namely the qualitative test and the quantitative test with AlCl3, and (4) the measurement of antioxidant activity in Beluntas leaf extract using the DPPH method. The results of this study obtained a total flavonoid content of 4.23 mgQE/g which was the result of maceration of the ethyl acetate solvent extract (yield: 5.09%), and all Beluntas leaf extracts in ethyl acetate solvent were included in the category of very strong antioxidant activity with an IC50 value of 31.68 μg/mL.

Influence of Solvent Properties on the Measurement Accuracy of Specific Rotation of Chiral Molecular Solutions Based on Photonic Spin Hall Effect

Chirality distinguishing of biomolecules has attracted much attention in numerous fields. When detecting the chirality of molecules based on the optical rotation characteristics, the detection accuracy of specific rotation is closely related to solvent properties. Herein, taking amino acids as an example, in the case of changing the type, potential of hydrogen value, and concentration of solvents, respectively, the specific rotation is measured using spin Hall effect of light based on weak measurement. The results indicate that the specific rotation values of chiral molecules are different in different types of solvents. When phosphate buffered saline is used as the solvent, the detection sensitivity of chiral molecules is higher under alkaline conditions. When the pH value is fixed, the detection performance under the solvent concentration of 0.1 m is better than that of 0.01 or 0.001 m. The study shows that the solvent properties affect the specific rotation detection of chiral molecular solutions. Proper solvent properties can improve its accuracy, which is of great significance to promote the sensitivity of chiral discrimination.

A Systematic Study on the Effects of Solvating Solvents and Additives in Localized High‐Concentration Electrolytes over Electrochemical Performance of Lithium‐Ion Batteries

AbstractLocalized high‐concentration electrolytes (LHCEs) based on five different types of solvents were systematically studied and compared in lithium (Li)‐ion batteries (LIBs). The unique solvation structure of LHCEs promotes the participation of Li salt in forming solid electrolyte interphase (SEI) on graphite (Gr) anode, which enables solvents previously considered incompatible with Gr to achieve reversible lithiation/delithiation. However, the long cyclability of LIBs is still subject to the intrinsic properties of the solvent species in LHCEs. Such issue can be readily resolved by introducing a small amount of additive into LHCEs. The synergetic decompositions of Li salt, solvating solvent and additive yield effective SEIs and cathode electrolyte interphases (CEIs) in most of the studied LHCEs. This study reveals that both the structure and the composition of solvation sheaths in LHCEs have significant effect on SEI and CEI, and consequently, the cycle life of energetically dense LIBs.

A Systematic Study on the Effects of Solvating Solvents and Additives in Localized High-Concentration Electrolytes over Electrochemical Performance of Lithium-Ion Batteries.

Localized high-concentration electrolytes (LHCEs) based on five different types of solvents were systematically studied and compared in lithium (Li)-ion batteries (LIBs). The unique solvation structure of LHCEs promotes the participation of Li salt in forming solid electrolyte interphase (SEI) on graphite (Gr) anode, which enables solvents previously considered incompatible with Gr to achieve reversible lithiation/delithiation. However, the long cyclability of LIBs is still subject to the intrinsic properties of the solvent species in LHCEs. Such issue can be readily resolved by introducing a small amount of additive into LHCEs. The synergetic decompositions of Li salt, solvating solvent and additive yield effective SEIs and cathode electrolyte interphases (CEIs) in most of the studied LHCEs. This study reveals that both the structure and the composition of solvation sheaths in LHCEs have significant effect on SEI and CEI, and consequently, the cycle life of energetically dense LIBs.

Remediation and recovery of Kariba weed as emerging contaminant in freshwater and shellfish aquaculture system via solvothermal liquefaction

Fast growing Kariba weed causes major problems and pollution on freshwater and shellfish aquaculture systems by interfering with nutrient uptake of crops, restricting sunlight penetration, and decreasing water quality due to massive biomass of Kariba weed remnants. Solvothermal liquefaction is considered an emerging thermochemical technique to convert waste into high yield of value-added products. Solvothermal liquefaction (STL) of Kariba weed as an emerging contaminant was performed to investigate the effects of different types of solvents (ethanol and methanol) and Kariba weed mass loadings (2.5–10 % w/v) on treating and reducing the weed via conversion into potentially useful crude oil product and char. Up to 92.53 % of Kariba weed has been reduced via this technique. The optimal conditions for crude oil production were found to be at 5 % w/v of mass loading in methanol medium, resulting in a high heating value (HHV) of 34.66 MJ/kg and yield of 20.86 wt%, whereas the biochar production was found to be optimum at 7.5 % w/v of mass loading in methanol medium, resulting in 29.92 MJ/kg of HHV and 25.38 wt% of yield. The crude oil consisted of beneficial chemical compounds for biofuel production such as hexadecanoic acid, methyl ester (65.02 peak area %) and the biochar showed high carbon content (72.83 %). In conclusion, STL as a remediation for emerging Kariba weed is a feasible process for shellfish aquaculture waste treatment and biofuels production.

Studies on the effect of solvent for the synthesis of low‐cost and efficient Pt‐Co/CAB cathode electrocatalyst to enhance the performance of a hydrogen‐based PEMFC

AbstractHighly efficient and low‐cost Pt‐Co/CAB bimetallic cathode electrocatalysts were synthesized for hydrogen‐based proton exchange membrane fuel cell (PEMFC) using three different types of solvent, namely, dimethyl sulphoxide (DMSO), dimethylformamide (DMF), and ethylene glycol (EG). The physical characterization of synthesized cathode electrocatalysts Pt‐Co/CAB‐DMSO, Pt‐Co/CAB‐DMF and Pt‐Co/CAB‐EG was performed by scanning electron microscope–energy‐dispersive X‐ray (SEM–EDX), X‐ray diffraction (XRD), and transmission electron microscopy (TEM) techniques, whereas the electrochemical investigation of all three Pt‐Co/CAB electrocatalysts was performed by CV and EIS studies. The synthesized Pt‐Co/C‐EG electrocatalyst produced the highest power density of 19.61 mW/cm2 at a room temperature of 33°C. The power density increased to 26.11 mW/cm2, that is, 133%, when the cell operating temperature was raised from 33 to 70°C. The excellent performance of the Pt‐Co/CAB‐EG cathode electrode proves that it can be recommended as a commercial electrocatalyst for PEMFC cathode. In addition, the EG/EG was identified as the best solvent for the synthesis of Pt‐Co/CAB cathode electrocatalysts.

Optimization of solvent extraction conditions of Cambodian soybean oil using response surface methodology

The conventional solvent extraction (CSE) method is commonly used to extract oil from oilseeds. Even though the extraction of oil from soybean seeds using the CSE method has been studied extensively, the application of response surface methodology (RSM) has not yet been widely explored. In this paper, the CSE method was employed using three different types of solvents – ethanol (Eth), n-hexane (Hex), and a mixture of Hex:Eth in a ratio of 2:1 – and optimized using RSM to extract the oil from Cambodian soybean seeds. For each solvent, a central composite design (CCD) was applied to optimize the extraction conditions, such as the extraction times (15, 30, and 45 min) and solvent-to-solid ratios (5:1, 10:1, and 15:1 mL/g). This CCD generated 11 experimental runs for each type of solvent. The optimum oil yields when using ethanol, Hex:Eth, and n-hexane were 20.53%, 18.78%, and 17.39%, respectively. The optimum condition was obtained at 15 min extraction time and 15:1 (mL/g) solvent-to-solid ratio for all solvent types. The coefficients of determination of ethanol, Hex:Eth, and n-hexane were 0.9710, 0.9954, and 0.9263, respectively, which mathematically indicated a good model for the prediction. Therefore, the model was considered accurate and reliable for predicting oil yields in this study.

Optimization of Experimental Parameters in the Solvent Extraction of Trans-Resveratrol from Pruning Waste of Vitis vinifera, Fetească Neagră Variety

The past few decades have seen a marked expansion in market demand for food supplements with therapeutic value. Due to this demand, the recovery of vine waste for obtaining certain phytochemicals or plant synthesized compounds with health-promoting activities can be an important economic component, principally with the agreement of the European Union for resveratrol as a new food ingredient. For the sake of economic capitalization, it is necessary to determine optimum extraction parameters for maximum recovery. In this paper, we have determined the optimum parameters for the solvent extraction of trans-resveratrol from vine prunings. We tested different extraction conditions: 35 different types of solvents, 10 types of solid-to-liquid ratios, 10 extraction times, 10 types of granulosity of the ground material and 7 consecutive extractions on the same material. The optimal parameters determined were: solvent ethanol:diethyl ether 4:1 ratio, 1:35 solid liquid ratio g/mL, 4 days for extraction time, 500 µm–350 µm granulosity of powdered material and one extraction on the material. These findings are confirmed by optimization of extracting parameters according to Box–Behnken design.

Pengaruh Jenis Pelarut pada Ekstraksi Jahe Merah (Zingiber officinale var. rubrum) terhadap Aktivitas Bakteri Penyebab Penyakit pada Hewan Ternak In Vitro

The use of antibiotics and commercial drugs for handling livestock can have dangerous side effects, so it is necessary to use natural alternative medicines. Red ginger is a potential plant used as traditional medicine. The content of metabolite compounds in red ginger consisting of groups: phenols, terpenoids, essential oils, and flavonoids are reported to be able to inhibit several pathogenic bacteria that cause disease in animals and humans. The purpose of this study was to determine the effect of different types of solvents in the extraction process of red ginger on the activity of disease-causing bacteria in livestock in vitro. Extraction was carried out by maceration method using several solvents consisting of: distilled water, 96% ethanol ethyl acetate, and n-hexane. Antibacterial activity test using agar diffusion method. The parameter tested is the diameter of the inhibition created around the disc paper. The results showed that red ginger extract using ethyl acetate, 96% ethanol, and n-hexane had a diameter of inhibition zone against Staphylococcus aureus bacteria of 3.38 mm; 3.17mm; and 3.70mm. In contrast to Escherichia coli bacteria, all solvents used for red ginger extraction were not found to have an inhibition zone against these bacteria.

Physicochemical Charastaristics of Leather Goat Quality from less Tanning Process

This research is to determine the percentage of chromium and the type of solvent in terms of the physicochemical quality of wet blue and leather from the waterless tanning process. This research was carried out from November 2021 to February 2022 at the Laboratory of the Yogyakarta Center for Leather, Rubber, and Plastics. The research method used was a Nested Completely Randomized Design (CRD) with 2-factor nested patterns, Factor 1 is percentage of chromium (A = 3%, B = 4% and C = 5%) and factor 2 namely different types of solvents (L1 = Water, L2 = Ethanol and L3 = acetone) with 3 replications. The materials used in this study were Etawa crossbreed goat skin and chromium, and the type of solvents was water, ethanol, and acetone. The variables observed were the physicochemical quality of the finished leather (stricter strength, tensile strength, elongation at break, moisture content, total chromium, ash content, fat content, and pH). The data obtained from the results of the research were analyzed using Analysis of Variance (ANOVA) if there were significantly different results obtained, followed by Duncan's Multiple Range Test (DMRT). On the physicochemical quality of the finished leather (leather), the results of this study showed that the type of solvent had a very significant difference (P < 0.01) in the physicochemical quality of the leather except for pH. The percentage of chromium nested in the type of solvent showed a very significant difference (P<0.01) in the quality of the finished leather. Based on the results of the research, the percentage of chromium nested in the type of solvent was about SNI 2981:2009; from this study, it can be concluded that Phase I research had the physicochemical quality of finished leather with an average stricter strength of 14.40 N/ cm2, tensile strength 15.40 N/cm2, elongation at break 54.32%, water content 4.76%, total chromium 3.64%, ash content 4.62%, fat content 2.44% and pH 4.41.

Effect of solvent mixtures on the ultrasound-assisted extraction of compounds from pineapple by-product

Extraction of compounds from pineapple by-products can be affected by operational conditions and solvents. This study aimed to (i) carry out the ultrasound-assisted extraction of phenolic compounds from pineapple peels using different types of solvents and operating conditions and (ii) characterize the extracts obtained. The solvents with the highest efficiency in extracting total phenolic compounds (TPC), namely water, ethanol, and acid solution (1 mol L−1 HCl), were tested in different proportions using a simplex-centroid mixture design. The effects of time (5–45 min), temperature (30–60 °C), and ultrasonic power (0–100 W) were also evaluated. Extracts were assessed for antioxidant potential, phenolic profile, and sugar composition. TPC contents ranged from 219.75 to 405.06 mg GAE 100 g−1, with the highest value obtained in the mixture of ethanol (0.50) and acid solution (0.50). The extract with the highest TPC content and antioxidant activity was obtained at 60 °C, 50 W of ultrasonic power and 30 min. The extract obtained under these conditions contained fructose (7.17 g 100 g−1) and glucose (8.29 g 100 g−1) as major soluble sugars and caffeic acid (217.65 mg 100 g−1) as the major phenolic acid. Therefore, the extraction of compounds under the conditions studied is an alternative to the valorization of pineapple waste.

Aktivitas Antibakteri Fraksi Aquades, Diklorometana dan N-Heksana Daun Majapahit (Crescentia cujete L.) terhadap Bakteri Escherichia coli ATCC 25922 Secara In-Vitro

Escherichia coli is a gram - negative bacteria which is able to cause infectious diseases in humans, including urina ry tract infections, stomach cramps, and diarrhea. The purpose of this study was to determine the antibacterial activity of the Majapahit leaf fraction and the optimum concentration to inhibit Escherichia coli bacteria. Majapahit leaves were extracted by t he maceration method using 70% ethanol f ollowed by fractionation using aqua dest solvent, dichloromethane, and n - Hexane. Phytochemical screening of Majapahit leaf extract for the content of flavonoids, alkaloids, and saponins. Antibacterial activity test us ing paper disc diffusion method with positive control of chloramphenicol and negative control of 10% DMSO. The results of phytochemical screening of extracts were positive to flavonoid compounds, alkaloids, and saponins. The results of the antibacterial ac tivity test of the Majapahit leaf fraction had an antibacterial activity which was indicated by the presence of a clear zone around the disc. The aqua dest fraction is the most active fraction that can inhibit Escherichia coli bacteria. Based on the data a nalysis that has been carried out, it can be concluded that the use of different types of solvents did not produce significant differences in inhibiting Escherichia coli bacteria.

Implementation of Principal Component Analysis-Cluster Analysis on The Extraction of Green Tea Leaf (Camellia sinensis (L.) Kuntze)

Several green tea leaf extraction studies only describe the results of the extraction method or the different types of solvents that produce the highest levels of polyphenols or caffeine without further analysis by statistical analysis. In addition, the statistical analysis method still often used is a statistical analysis of variance, which has weaknesses. This study used PCA and CA methods to analyze samples based on the solvent's effect on temperature and pH. The solvents used in extracting green tea leaves were hot distilled water at ±95oC, distilled water, citrate buffer pH 4.3, and phosphate buffer pH 7.4 without heating (±25oC). The parameters analyzed were yield, water content, total ash content, acid insoluble ash content, total polyphenol content, and caffeine in green tea leaf extract (Camellia sinensis (L.) Kuntze). Classification with PCA results in a 2-dimensional data reduction that represents all data. Therefore, PC1 can extract as much as 68.7% of the information, and PC2 can extract 22.9% of the information. Cumulatively, PC1 and PC2 extracted as much as 91.5% of the information. Classification with CA resulted in 3 clusters. The third cluster, namely numbers 2 and 3, is the cluster that has the closest similarity with the distance between the cluster centroids of 2.08564 and the similarity level of 56.7850%.

Characteristics and Antioxidant Potential of Sulfated Polysaccharides from Cladophora crispata

Cladophora crispata, a diffusive green freshwater algum in Syria, forms a rich source of nutrients, especially sulfated polysaccharides (SPs). The SPs were extracted from Cladophora crispata by ultrasonic-assisted extraction using different types of solvents (methanol-70%, ethanol-70% and acetone-70%) at various temperatures (40, 60 and 80 °C) and for different extraction times (30, 75 and 120 min). Maximum yield of SPs (13%) and highest total soluble carbohydrate (74.36%) were achieved using acetone-70% as a solvent at 40 °C for 120 min. Purification of crude SPs was performed using Sephadex gel G-100. The purification process afforded two fractions (F1 and F2) for all treatments. The monosaccharides for the crude and for the F1 and F2 fractions were identified by thin-layer chromatography to consist of rhamnose, galactose, xylose and ribose. The chemical composition and antioxidant activity (DPPH and ATBS assays) of the crude and fractions were determined. FT-IR analysis revealed that the fractions consist of sugar units, protein units, sulfate groups and uronic acids, the content of which was determined following standard methods. Highest sulfate content was obtained upon extraction at low temperature (40 oC). The sulfate content had a significant strong positive correlation with the DPPH scavenging activity, but a weak negative one with the ABTS values. On the other hand, the uronic-acid content had a significant negative correlation with the DPPH values and a positive one with the ATBS values. Highest scavenging activity on DPPH radical (35.82%) was observed for the F2 fraction from the acetone-70% extract which had the highest sulfate content, while the highest scavenging effect on ABTS (39.71%) was found for the F1 fraction from the ethanol-70% extract which had the highest uronic-acid content.

Obtaining of Formaldehyde Modified Tars and Road Materials on Their Basis

The process of chemical modification of tar and oxidized bitumen with formalin (a 37% aqueous solution of formaldehyde) in a hermetic container was investigated and the effectiveness of the proposed process was proven. It is shown that the most effective raw material for the process is tar, not oxidized bitumen. The expediency and impact of using different types of solvents (toluene, p-xylene and petroleum solvent, and n-octane) in the modification process were studied. It was established that the solvent should be used in the modification of oxidized bitumens, not tars. The low efficiency of the process of tar modification with formaldehyde without the use of a catalyst was proven, and it was shown that the most active catalyst in the process is sulfuric acid. The influence and optimal values of the main factors controlling the process of chemical modification of tar with formaldehyde were established, namely temperature, duration, and content of the modifier—formaldehyde. On the basis of the found regularities and optimal conditions of the modification process, samples of binding materials (of different brands) with different operational characteristics were obtained, and their comprehensive research was carried out. With the help of FTIR spectroscopy, the chemical interaction of tar with formaldehyde in the presence of an acid catalyst was confirmed. The design of the compositions of asphalt concrete mixtures using formaldehyde-modified tar was carried out, from which cylindrical samples of stone mastic asphalt (SMA-15 brand) were obtained, which were tested according to the main indicators: average density, water-saturation, compression strength at 20 and 50 °C, compression strength after water-saturation (MPa) at 50 °C.