Интеллектуальная собственность

FIELD: organic chemistry, chemical technology. ! SUBSTANCE: invention relates to an improved method for synthesis of bis-(chlorooxyimino)-acetone. The chlorination reaction is carried out in simultaneous dosing calcium chloride, concentrated hydrochloric acid and 30% hydrogen peroxide saturated preliminary with calcium chloride to dioxyiminoacetone suspension in saturated solution in the ratio water : calcium chloride = (1.2-1.3):1 (in moles) in the reaction mass, or concentrated hydrochloric acid and 30% hydrogen peroxide with the retained ratio water : calcium chloride = (1.6-1.7):1 (in moles) and in maintaining the molar ratio dioxyiminoacetone : hydrochloric acid : hydrogen peroxide = 1:(2.0-2.1):(2.2-2.5) (in moles), respectively. Method is simple and provides preparing the end product with the high yield - 95.7%. ! EFFECT: improved method of synthesis. ! 6 ex Подробнее

FIELD: organic synthesis. ! SUBSTANCE: bis(chloroximino)acetone is prepared from dioximinoacetone, which is treated with mixture of aqueous hydrochloric acid and sodium hypochlorite aqueous solution at dioximinoacetone/sodium hypochlorite/hydrochloric acid molar ratio 1.0:(2.0-2.5):(2.0-2.5). ! EFFECT: simplified technology. ! 7 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: invention relates to oilfield site preparation, in particular, to the treatment of highly stable oil-water emulsions. Invention relates to a method of complex processing of an intermediate layer, stabilized by iron sulfide, including processing of the intermediate layer, consisting of heating, introducing inhibited hydrochloric acid, followed by settling. Method of processing the intermediate layer comprises heating the intermediate layer to 60–85 °C with circulation for 0.5–1 h, introducing a diluent in an amount of 10–25 % by volume of the intermediate layer during circulation, introducing a reagent in an amount of 1,000 to 1,2000 mg/dm3 with a diluent into the intermediate layer, circulating the mixture of the intermediate layer with the diluent and reagent for 1–2 h, further settling for 48–120 h, separating the residual intermediate layer, further heating of the residual intermediate layer to 60–80 °C with circulation, further introducing of 10–25 % inhibited hydrochloric acid into the residual intermediate layer in an amount of 10–50 % by volume of the residual intermediate layer, further circulation of the mixture of the residual intermediate layer with inhibited hydrochloric acid for 1–2 h, further settling for 48–120 h, further directing of separated water to neutralization with an alkaline reagent to pH 3.0–6.0. ! EFFECT: increased efficiency of processing of the intermediate layer. ! 4 cl, 1 ex, 4 tbl, 3 dwg Подробнее

FIELD: technological processes. ! SUBSTANCE: invention relates to two embodiments of a method for treating an intermediate layer stabilized with iron sulfide using inhibited hydrochloric acid. One option involves heating, introducing inhibited hydrochloric acid followed by settling. It is characterized by the fact that the intermediate layer is heated to 60–80 °C with circulation, then 10–25 % inhibited hydrochloric acid is added to the intermediate layer in an amount of 10–50 % to the volume of the intermediate layer, the mixture of the intermediate layer with inhibited hydrochloric acid is circulated for 1–2 hours, then it is left to stand for 48–120 hours, then the separated water is sent to neutralize with an alkaline reagent to pH 5.5–6.9. ! EFFECT: proposed method makes it possible to improve the processing efficiency of the intermediate layer. ! 5 cl, 1 dwg, 2 tbl, 23 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: acid emulsion for oil reservoir bottomhole zone processing contains, wt %: solvent - reagent MIA-prom K 11.0-35.0; emulsifier-reagent ITPS-04 E 1.0-10.0; reagent ITPS - 708 A 1.1-5.5; hydrochloric acid - the rest. ! EFFECT: slowing the reaction rate of acid with the reservoir rock, increase of the coverage degree by the reservoir processing, prevention of the colmatage deposits formation with the enhanced effect of the iron stabilization, the possibility to use for the bottomhole acidizing, represented by heterogeneous in permeability the carbonate reservoirs. ! 3 tbl, 8 ex Подробнее

FIELD: oil and gas production. ! SUBSTANCE: composition, mainly intended for use in treatment of bottom-hole zone of carbonate oil formations, contains, wt %: inhibited 24% aqueous hydrochloric acid 10.0-15.0, acetic or hydrofluoric acid 2.0-4.0, oil extraction reagent 1.0-2.0, organic solvent 15.0-20, and water - the rest. ! EFFECT: increased productivity of formation. ! 2 tbl Подробнее

FIELD: oil production equipment, particularly for development oil reservoirs characterized by zonal non-uniformity and formed by terrigenous rock. ! SUBSTANCE: method involves alternating injecting acid solution and polymer-and-alkaline solution beginning from acid solution, wherein the polymer-and-alkaline solution includes water-soluble carbonate , water-soluble polymer and water so that gaseous carbon dioxide is generated as a result of their reaction; forcing carbon dioxide plug with water. Acid solution is aqueous solution of hydrochloric acid, lignosulphonate, solvent and nonionic surfactant or aqueous solution of hydrochloric and/or hydrofluoric acid, solvent and nonionic surfactant or composition including hydrochloric acid in amount of 10.0-25.9 % by weight, nonionic surfactant in amount of 0.05-1.0 % by weight and water. After acid solution injection polymer-and-alkaline solution is forced, wherein the polymer-and-alkaline solution includes water-soluble carbonate in amount of 5.0-15.0 % by weight, water-soluble polymer in amount of 0.05-1.0 % by weight, remainder is water. ! EFFECT: increased efficiency of oil reservoir development and, as a result, increased reservoir treatment area and increased oil recovery by forming oil-displacing agent directly in reservoir environment. ! 12 ex, 1 tbl Подробнее

FIELD: oil and gas production. SUBSTANCE: invention relates to preparation of inhibited hydrochloric acid for use in oil production, in particular for treatment of bottom zones of producing and water-injecting wells. Process comprises dilution of hydrochloric acid with water and addition of nitrogen-containing component, namely primary aliphatic amines of formula NH2R or their mixture with secondary aliphatic amines of formula NHR2, where R represents C8-C20-alkyl, or isoalkylamines comprising branched structure of amine fraction C12-C18, and also addition of a nonionic surfactant and formaldehyde-containing compound taken jointly with aliphatic alcohol at their ratio (3-15): 1, respectively. Thus, acid corrosion inhibiter is formed in hydrochloric acid itself. EFFECT: simplified preparation procedure. 3 cl, 1 tbl, 30 ex Подробнее

FIELD: petroleum processing. SUBSTANCE: composition contains petroleum product and detectable amount of marker, in particular biological pigment preparation "Prodigiosin" in amount (1,2-9,3)•10-6 g/l. Marking is performed by adding to product required amount of marker solution. Identification of petroleum product involves adding developing reagent, in particular 36% aqueous hydrochloric acid solution, which is added in amount 0.33-0,35% to sample depending on the volume of sample. Quantitative content of marker in petroleum product is found by absorption spectrophotometry technique. Marking solution contains marker and solvent, concentration of the former being 0.13-2.20%. Solvent is selected from ethanol, light petroleum, and ethyl acetate. Marker is prepared by growing bacteria Serratia marcescens on agar-supplemented oats medium followed by extraction of 96% ethanol at shaking. Multistep extraction is continued until bacterial mass is decolorized and, after each step, bacterial mass is sedimented and then separated from supernatant. EFFECT: enlarged assortment of markers. 10 cl, 2 tbl, 73 ex Подробнее

FIELD: chemical technology. SUBSTANCE: invention relates to production of inhibited hydrochloric acid used in oil production for treatment of critical zone of petroleum and water-forcing holes. Method for preparing inhibited hydrochloric acid involves its dilution with water and addition primary aliphatic amines of the formula NH2R or mixture of primary and secondary amines of the formula NHR2 to acid where R means alkyl with number of hydrocarbon atoms C8-C20 or isoalkylamines with branched structure of amines of fraction C12-C18 and additional addition of non-ionogenic surface-active substance and formaldehyde-containing compound. Alternatively, before addition of nitrogen-containing component to hydrochloric acid an aqueous solution this component is mixed preliminary with portion of hydrochloric acid in the ratio mole/mole and non-ionogenic surface-active substance and formaldehyde-containing compound are added to the prepared mixture. Invention provides preparing effective inhibited hydrochloric acid due to formation of inhibitor of acid corrosion in hydrochloric acid in the process for preparing inhibited hydrochloric acid. EFFECT: improved preparing method, enhanced effectiveness of acid. 2 cl, 1 tbl, 24 ex Подробнее

FIELD: oil producing industry, methods of development of oil pools presented by nonuniform formations. SUBSTANCE: method includes injection into formation of aqueous solution of sodium silicate and suspension of zeolite-containing rock preliminarily treated with hydrochloric acid, allowing the process to stand for some time and injection of displacement agent, and additional injection of aqueous solution of cellulose ether. Displacement agent is used in form of water or of aqueous solution of surfactant. Injection of aqueous solutions of cellulose ether and sodium silicate, suspensions of zeolite-containing rock preliminarily treated with hydrochloric acid is carried out simultaneously or successively. EFFECT: increased oil recovery from formations and reduced water-encroashment of wells at late stage of pool development. 2 cl, 1 tbl Подробнее

FIELD: oil and gas production. SUBSTANCE: composition contains, wt.%: 10-12-% aqueous hydrochloric acid solution, 10.0-18.0; 1.5-5.0-% aqueous hydrofluoric acid solution, 1.5-5.0; and organic solvent, the balance. The latter is a mixture of alkane and aromatic hydrocarbon containing, wt.%: benzene, 0.5-1.0; toluene, 1.0-1.5; C8-alkylbenzene, 20.0-25.0; C9-alkylbenzene, 35.0-40.0; C10-alkylbenzene, 1.0-5.5; C11(and higher)-alkylbenzene, 0.5-1.0; and C4-C10-alkanes, the balance. EFFECT: optimized analysis of composition. 3 ex Подробнее

FIELD: methods of restriction of water inflow to oil producing wells; applicable in regulation of injectivity profile of water injection wells. SUBSTANCE: method includes successive injection of mixture of 1-3% solution of hydrochloric acid with 1-1.5% solution of sodium silicate at pH of mixture from 1.5 to 2. After injection of said mixture, 30-50% solution of sodium silicate is injected in amount sufficient for increase of mixture pH to 5-8. EFFECT: higher efficiency of method due to formation under formation conditions of gel-forming fringe with high structural and mechanical properties. 2 cl, 1 dwg, 2 tbl, 1 ex Подробнее

FIELD: production of reagents for inhibition of acid corrosion and methods of production of inhibited acids applicable in oil-producing, machine-building, chemical and other industries. SUBSTANCE: reagent for inhibition of acid corrosion is used in the form of product of reaction of still residue of aniline production and 12-% aqueous solution of hydrochloric acid (with their ratio of 1:(2-3). Method of production of inhibited sulfuric acid includes dilution of sulfuric acid with water and introduction of said reagent for inhibiting of acid corrosion. In production of inhibited hydrochloric of mixture of hydrochloric and hydrofluoric acids, acid is diluted with water and reagent for inhibition of acid corrosion is introduced. Reagent is used in the form of said reaction product and halide or surfactant additionally introduced. In preferable versions of method of production of inhibited acids, formaldehyde-containing compound is additionally introduced into acid solution. EFFECT: higher efficiency of reagent for inhibition of acid corrosion and method of production of inhibited acids. 5 cl, 2 tbl, 43 ex Подробнее

Изобретение может быть использовано для получения магния из кислородсодержащего сырья, например магнезита с полным или частичным потреблением хлора в качестве оборотного продукта, необходимого для превращения оксидных соединений магния в его хлориды. Для получения магния из кислородсодержащего сырья используют аммиачные соединения с последующим обезвоживанием полученного продукта и его электролитическим разложением с получением магния и хлора. Исходное сырье подвергают измельчению, выщелачивают раствором соляной кислоты и хлористого аммония, полученный раствор обрабатывают хлором, очищают от примесей и подают на абсорбцию хлористым аммонием. Раствор, содержащий не менее 23% по массе хлористого магния, упаривают, кристаллизуют и полученный аммониевый карналит обезвоживают и разлагают в расплаве отработанного электролита. Выделившийся хлористый магний направляют на электролиз, а хлористый аммоний направляют на обработку раствором после выщелачивания. В раствор после сырья добавляют маточный раствор после кристаллизации, Отходящие газы после обезвоживания карналлита, содержащие хлористый водород и хлористый аммоний, обрабатывают конденсатом после упаривания раствора хлористого магния и хлористого аммония и образовавшийся раствор соляной кислоты и хлористого аммония с содержанием HCI не менее 18% по массе направляют на выщелачивание исходного сырья, снижаются тепло- и энергозатраты и вредное воздействие на окружающую среду. 4 з.п.ф-лы, 1 ил. Подробнее

FIELD: oil and gas production. SUBSTANCE: inhibited hydrochloric acid used for treatment of bottom zones in oil and water-injection wells is prepared by dilution thereof with water followed by addition of nitrogen-containing component, in particular higher aliphatic amines having 10 to 18 carbon atoms. EFFECT: simplified preparation procedure. 1 tbl Подробнее

Изобретение относится к способам получения белковых гидролизатов из сырья водного происхождения, и может быть использовано для переработки моллюсков с целью получения продуктов пищевого и лечебно-профилактического назначения. Способ предусматривает извлечение из створок раковин мягкой ткани моллюсков, ее гидролиз соляной кислотой и нейтрализацию. Извлечение мягкой ткани из створок раковин осуществляют путем их нагрева при перемешивании для нарушения герметичности раковин и добавления ферментного препарата, а продолжительность времени кислотного гидролиза выбирают в зависимости и от качества сырья после окончания ферментативной обработки. Изобретение позволяет удешевить процесс производства лечебно-профилактических гидролизатов из моллюсоков с одновременным уменьшением длительности технологического цикла. 7 з. п. ф-лы, 1 табл. Подробнее

Изобретение относится к химической переработке древесины и может быть использовано для получения пихтового масла, пихтового бальзама, антоцианидиновых красителей и углеродных сорбентов. Переработка пихтовой коры включает измельчение, экстракцию неполярным растворителем, упаривание экстракта. Последний вакуумной разгонкой разделяют на пихтовое масло и пихтовый бальзам. После чего кору кипятят в этиловом спирте, содержащем 2 - 5% соляной кислоты, и получают антоцианидиновый краситель. Оставшуюся кору окислительным пиролизом при 600 - 800oС в течение 25 - 30 мин в присутствии катализатора - мартеновского шлака превращают в углеродные сорбенты. Это обеспечивает полную утилизацию пихтовой коры и расширение ассортимента получаемых продуктов. 1 ил., 1 табл. Подробнее

Изобретение относится к химии углеводов и касается комплексного получения биологически активных водорастворимых полисахаридов, в частности ламинаранов и фукоиданов. Способ предусматривает обработку свежих, или свежезамороженных, или сухих водорослей растворителями с целью удаления низкомолекулярных веществ, экстракцию полисахаридов 0,1 N соляной кислотой при комнатной температуре и водой при 50 -60°С. Разделение ламинаранов и фукоиданов и последующее их фракционирование осуществляют с помощью гидрофобной хроматографии. Последовательно полученные экстракты полисахаридов наносят на колонки раздельно. В качестве гидрофобного сорбента используют полихром-1. Технический результат - упрощение процесса и увеличение выхода целевого продукта. 2 з.п. ф-лы, 2 табл., 2 ил. Подробнее

FIELD: oil-and-gas producing industry. SUBSTANCE: method includes delivery of hydrochloric acid in container of tubing on cable to required interval. Then lowered into well is gas generator with slowly burning charge, and the latter is ignited 0.1-1 m below the producing formation. Heated hydrochloric acid is forced into fractures and pores of formation. After time interval of 1-1.5 h implosive device is lowered into well for suction of reaction products from bottom-hole formation zone, and its subsequent removal to surface. EFFECT: higher efficiency of thermo-gas-chemical treatment of bottom-hole formation zone through the entire thickness of formation. 3 dwg Подробнее