SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This paper examines the calculation of the electromotive force of a differential electrochemical cell using tungsten electrodes for acidity measurement. It contrasts the ideal equilibrium interpretation of the tungsten electrode potential with experimental deviations, then treats the electrode as st…
This paper examines treatments intended to improve Siberian cedar pencil slats, a domestic substitute for Virginia juniper, with attention to color, sharpening quality, rejection from warping, and paraffin impregnation. The authors tested alkaline treatment and studied how surfactant additives and w…
This study examines the improvement of cedar pencil slats, whose natural properties do not fully meet pencil manufacturing requirements, by alkaline treatment with calcined soda. The authors review the chemical effects of alkali on wood constituents and test soda concentrations of 1 to 5 percent in …
This paper examines the use of dilute acid treatments to improve Siberian cedar pencil slats, with attention to softness, sharpening behavior, coloration, and dimensional stability. Normal and compression wood slats were treated in solutions containing nitric and tartaric acids under vacuum and heat…
This paper examines beneficiation of talc from the Alguy deposit, where talcites contain quartz and quartzite impurities concentrated mainly in coarser size fractions. The authors characterize the particle size and chemical composition of the sample, then test dry separation of the minus 3 mm materi…
This paper addresses the low quality of the clay product obtained during hydrocyclone beneficiation of kaolinized sands from the Tugan deposit, where silty sand, iron oxides, and humic substances limit use in fine ceramics and as industrial fillers. The authors report a deep beneficiation scheme com…
Industrial beneficiation of quartz sands from the Tugan deposit is examined as a means of removing ferruginous clay that makes the raw material unsuitable for glassmaking and molding. The paper describes a flowsheet developed at Tomsk Polytechnic Institute and tested in 1965 on a seasonal industrial…
This paper examines the possibility of using phenol-containing wastewater from coke-chemical and related gas plants as process water in the flotation of fine coal slimes, combining wastewater dephenolization with coal beneficiation. The authors argue that, after preliminary phenol removal, final pur…
This study examines how trace additions of soluble magnesium, chromium, aluminum, and iron salts affect ammonium sulfate crystallization in the saturator process, where the product is often too fine and prone to caking. Laboratory crystallization experiments were conducted using fine ammonium sulfat…
This study examines the aggregate properties of coal flotation concentrate before tube drying, where high moisture content produces a sticky cake that dries unevenly and is difficult to distribute in the dryer. The authors relate flowability and gas permeability to maximum molecular moisture capacit…
This paper proposes a methodology for evaluating the agglomerability of finely ground materials for granulation, addressing the absence of a generally accepted assessment criterion. The authors argue that agglomerability should be characterized by the relationship between maximum molecular moisture …
This paper addresses reduced gas permeability and furnace smoking in silicon carbide production caused by the use of fine-grained quartz raw materials. It proposes a simplified granulation method in which a plasticized quartz sand, salt, and sulfite-alcohol stillage mixture is disintegrated in a dru…
This study examines how sodium humates affect the lumping and granulation behavior of quartz sand with different particle size distributions. Four Tashlinskii sand samples were tested by introducing either water or a 1.66 percent sodium humate solution into dry sand and measuring aggregate size, mas…
This study evaluates whether the mechanical forces acting during wet pelletizing of fine grained materials can be treated as equivalent to briquetting pressures required to obtain similar density. Quartz sand and iron ore concentrate were formed into pellets and pressed briquettes, then compared by …
This paper examines losses and processing difficulties in conventional boron carbide charge preparation, where powdered boric acid and petroleum coke are moistened and fed to an electric arc furnace. The authors analyze boric acid dehydration as a source of volatilization and compare laboratory heat…
This paper examines losses of boric anhydride and related volatile components during the early melting of borosilicate glass batches, a process that can alter melt composition and promote defects. Laboratory experiments compared loose and granulated batches of 3S-5K glass under gradual heating, rapi…
This study examines peat tar and tar from peat-based fuel-smelting materials to identify pyrolysis conditions and properties relevant to technological processing and use as raw material for organic synthesis. Tars were produced in a laboratory reactor at coking and vapor-gas pyrolysis temperatures o…
This study examines light neutral oils isolated from peat tars produced by thermal decomposition at 600, 700, and 800°C, including tars from pure peat and peat, iron ore fuel-smelting briquettes. The oils were separated by steam distillation, acid-base treatment, solvent extraction, and, for selecte…
This study examines how secondary heating affects the electrical resistance of coke, using resistance measurement as an indicator of structural transformations. Coke powders from different zones of a lump, identified as seam, center, and cabbage, were heated in a laboratory apparatus to 1400°C under…
This paper investigates how secondary heating affects the mechanical properties of metallurgical coke, a question complicated by conflicting earlier findings on hot strength behavior. Industrial coke from a single chamber was separated into three characteristic zones, the seam, center, and cauliflow…
This paper addresses the need for large-scale production of soluble humates from peat for industrial and agricultural use, given the limitations of existing batch processes. It evaluates process intensification methods, including ultrasound, mechanical dispersion, heating, reagent selection, and sus…
This study evaluates gas liquid chromatography with modified cetyltrimethylammonium bentonite as a stationary phase for determining the composition of crude benzene, toluene, and xylene fractions from the Kuznetsk Metallurgical Combine. Using a flame ionization detector, relative retention volumes o…
This paper examines the mechanism by which a strong structure forms during thermal briquetting of peat, focusing on the role of liquid pyrolysis products generated at briquetting temperatures. Using Vasyugan peat and fractions isolated by group analysis, the authors measured products of thermal deco…
This paper examines how heating rate during coking affects the mechanical strength of coke produced from peat thermobriquettes made from Taganskoye peat. Laboratory coking tests varied the temperature range heated at 2 degrees per minute before increasing to 5 degrees per minute, followed by measure…
This article examines the efficiency of mineral fertilizer production in Western Siberia, focusing on nitrogen fertilizer output at the Kemerovo Nitrogen-Fertilizer Plant and the Novo-Kemerovo Chemical Combine. Using comparative cost, labor productivity, capital productivity, and profitability data,…
This paper systematizes how external operating conditions affect selectivity in heterogeneous catalytic reactions, considering temperature, reactant concentration, contact time, dilution, and diffusion limitations. Using kinetic expressions for parallel and consecutive reaction schemes, the authors …
This paper examines how diffusion limitations affect the synthesis of organic compounds from carbon monoxide and water vapor at elevated pressure. Using an iron, copper precipitated catalyst, the authors compare experiments at atmospheric pressure and 10 atm, evaluating carbon monoxide conversion to…
This paper examines how external diffusion limitations influence the selectivity of parallel heterogeneous reactions, particularly when the competing reactions have different kinetic orders. Using a macrokinetic formulation that relates surface reaction rates to near-surface reactant concentrations,…
This study reports the synthesis of N-monobenzoyl and N,N′-dibenzoyl derivatives of 5,5-ethylalkylbarbituric acids as part of a search for anticonvulsant agents among barbituric acid derivatives. Ethylalkylmalonic esters were prepared by alkylation of malonic ester, converted to the corresponding ba…
This study describes the synthesis of phosphorus-containing amide derivatives of 9-fluorenone-4-carboxylic acid as potential insecticidal agents. Starting from technical phenanthrene, the authors prepared 9-fluorenone-4-carboxamide, converted it through 9-oxofluorenoyl-4-trichlorophosphazo and the c…
This paper reports the synthesis of acyl derivatives of 4-propylaminoantipyrine as potential antiphlogistic agents and as analogues of previously studied methyl and ethyl aminoantipyrine derivatives. 4-Propylaminoantipyrine was prepared by catalytic hydrogenation of the Schiff base from aminoantipyr…
This paper reports the synthesis of substituted amides of 9-aminofluorene-4-carboxylic acid as part of an effort to use coke-chemical phenanthrene in organic synthesis and to obtain water-soluble hydrochloride-forming compounds of possible insecticidal interest. The work proceeds from 9-fluorenone-4…
This paper reports the synthesis of new N-methyl analogs of acyl derivatives of 1-phenyl-2,3-dimethyl-5-keto-4-pyrazolylamine, motivated by earlier findings that related benzoyl derivatives showed anti-inflammatory and antipyretic activity and by the possible activity-enhancing effect of N-methyl su…
A series of antipyrilamides of lower fatty and halogen-substituted fatty acids was prepared to examine relationships among acyl structure, solubility, and possible physiological activity. The compounds were synthesized mainly by acylating 4-aminoantipyrine with free acids in benzene in the presence …
This study examines steric effects and spatial structure in synthesized alkyl esters and nitrogen-containing derivatives of 2′-formylbiphenyl-2-carboxylic acid. The authors compare esterification yields with those of 2-biphenylcarboxylic acid and evaluate molecular refraction and infrared carbonyl a…
This study evaluates pine stump resinous wood as a raw material for rosin and pine resin production in several districts of Tomsk Oblast, focusing on timber enterprises near the planned Asino timber industry complex. Sample plots were surveyed by counting stumps, selecting model stumps, recording yo…
This study addresses discrepancies between saponification titration and gas, liquid chromatographic determination of bornyl acetate in the essential oil of Siberian stone pine. The authors examined acids formed by saponification using paper chromatography and confirmatory silver nitrate development,…
This study examines the use of nitrolignin from cottonseed hull hydrolysis lignin as a raw material for preparing an organophosphorus insecticide, O-methyl O-ethyl O-nitrolignothiophosphate. Several nitrolignin samples obtained under different nitration conditions were characterized by functional gr…
This study examines alkaline oxidation of hydrolysis lignin from cottonseed hulls, a lignin distinguished from wood lignins by its low methoxyl content, in the presence of vanadium pentoxide. Technical lignin and dimethyl sulfate methylated lignin were oxidized in sealed stainless steel ampoules und…
This study examines the oxidation products of hydrolysis lignin from the Krasnoyarsk Hydrolysis Plant under alkaline conditions in the presence of vanadium pentoxide. Ether-soluble products from oxidized lignin were separated into aldehyde, acidic, and phenolic fractions, then analyzed using paper a…
This study examines the direct iodination of aromatic ethers and a fatty aromatic acid, specifically anisole, diphenyl ether, and phenylacetic acid, using elemental iodine in acetic acid in the presence of a sulfuric and nitric acid mixture. The authors present experimental procedures intended to av…
This paper reports the synthesis of 2,2′-diphenyl-bis-glyoxal, a previously undescribed biphenyl glyoxal derivative of interest because related glyoxal compounds had shown antiviral activity. Guided by the hypothesis that the spatial arrangement of reactive glyoxal groups may influence selectivity t…
This paper describes the preparation of previously unreported substituted phenanthridone derivatives, motivated by interest in phenanthridine and phenanthridone systems as components of alkaloids and medicinal compounds. Starting from fluorenone-4-carboxylic acid and its butyl ester, the authors app…
This study reports the synthesis of previously undescribed benzoxazole derivatives as part of a search for potentially biologically active compounds in this class. Diphenic acid was condensed with o-aminophenol under melt conditions in a carbon dioxide stream to obtain 2,2′-bis-(2-benzoxazolyl)-diph…
This study examines impurities formed during industrial production of 1,2-dichloroethane by chlorination of the ethylene fraction of coke oven gas, a process that yielded only low grade product. Using classical analytical methods together with gas liquid and gas adsorption chromatography, the author…
This study examines purification of 3-vinyl-9-ethylcarbazole and the effect of monomer purity on its suspension copolymerization with divinylbenzene for potential radiation-resistant ion-exchange resin precursors. Various polymerization inhibitors were tested during vacuum distillation, and basic cu…
This study examines suspension copolymerization of 9-vinylcarbazole with styrene and divinylbenzene as a route to crosslinked granular copolymers potentially useful for ion-exchange resins. The authors vary initiator type and concentration, temperature, monomer and aqueous phase ratio, emulsifier, d…
This paper describes a synthetic method for 9-carbazolylacetic acid and substituted analogs, compounds of interest as possible plant-growth regulators. The authors replace earlier ester-based procedures with direct reaction of carbazole or substituted carbazoles with haloacetic acids in dimethylform…
This study investigates acrylates of 9-(beta-hydroxyethyl)carbazole derivatives as potential polymerizable monomers related to heat-resistant carbazole-containing materials. The authors synthesized acrylates by direct esterification of 9-(beta-hydroxyethyl)carbazole and 3,6-dichloro-9-(beta-hydroxye…
