41 results about "Carbon oxysulfide" patented technology

The invention provides an advanced alkane purifying method for removing impurities. The method comprises the following steps: 1, alkane to be purified contacts with an alkali solution; 2, the alkane contacts with a copper adsorbent; and 3, the alkane contacts with an adsorbent for selectively adsorbing polar compounds to obtain advanced purified alkane. The advanced alkane purifying method for removing impurities can be used for advanced purification of a C3-C5 alkane fraction generated through FCC; and an alkali washing processing unit, a fine desulphurization unit and a polar compound adsorption unit are used to remove hydrogen sulfide, mercaptan, carbon oxysulfide and other sulfides, and a small content of methanol, dimethyl ether and / or acetone and other impurities, so the C3-C5 alkane fraction generated through the FCC is suitable for being converted to propylene, isobutene or pentene, so the output of olefins is improved, the life of an alkane dehydrogenation catalyst is prolonged, the unit consumption is reduced, the economic benefit is improved, and the operation of a downstream dehydrogenation method is improved.

A system for producing oil and / or gas comprises a system for producing oil and / or gas comprising a formation comprising a mixture of oil and / or gas and a carbon disulfide formulation and / or a carbon oxysulfide formulation; a mechanism for releasing a separating agent into the formation, the separating agent adapted to separate the oil and / or gas from the carbon disulfide formulation and / or the carbon oxysulfide formulation.

The invention relates to a detection method of trace volatile sulfides in a gypsum board. The detection method solves the problems of poor selectivity and difficulty for accurate analysis of volatile sulfides with a low concentration in present detection methods. The detection method realizes the qualitative and quantitative analysis of an object to be detected by placing a gypsum board in a climate box, keeping a constant temperature and humidity, and performing trapping by a solid adsorbent, thermal desorption, separation by a capillary column of gas chromatography, and detection by a flamephotometric detector. The detection method has the advantages of high selectivity, and high sensitivity, is especially applicable to the analysis and determination of trace volatile sulfides (hydrogen sulfide, sulfur dioxide, carbon oxysulfide, carbon disulfide) with a low concentration and multiple components, has accurate and reliable determination, and has good application prospects.

The invention relates to a method for operating a gas scrubber in which a feed gas containing hydrogen, carbon monoxide, carbon dioxide and carbon oxysulfide and / or hydrogen sulfide is scrubbed in a scrubber (A1) with a scrubbing agent (3, 4) preloaded with carbon dioxide (1), thereby substantially selectively separating sulfur components from the feed gas and producing a desulfurized gas stream (5, 9). The invention is characterized in that sulfur-free scrubbing agents (3, 4) are used whose partial pressure of carbon dioxide is equal to or greater than the partial pressure of carbon dioxide in the feed gas (1) to be desulfurized when it is introduced into the scrubber (A1) pressure.

The invention provides an advanced alkane purifying method for removing impurities. The method comprises the following steps: 1, alkane to be purified contacts with an alkali solution; 2, the alkane contacts with a copper adsorbent; and 3, the alkane contacts with an adsorbent for selectively adsorbing polar compounds to obtain advanced purified alkane. The advanced alkane purifying method for removing impurities can be used for advanced purification of a C3-C5 alkane fraction generated through FCC; and an alkali washing processing unit, a fine desulphurization unit and a polar compound adsorption unit are used to remove hydrogen sulfide, mercaptan, carbon oxysulfide and other sulfides, and a small content of methanol, dimethyl ether and / or acetone and other impurities, so the C3-C5 alkane fraction generated through the FCC is suitable for being converted to propylene, isobutene or pentene, so the output of olefins is improved, the life of an alkane dehydrogenation catalyst is prolonged, the unit consumption is reduced, the economic benefit is improved, and the operation of a downstream dehydrogenation method is improved.

The invention provides a synthesis method of cartap, and relates to a synthesis method of 1,3-bis(carbamyl sulfonium)-2-(N,N-dimethylamino) propane hydrochloride. An original medicine of cartap is prepared from carbon oxysulfide, ammonia and 1-(N,N-dimethylamino)-2,3-propylene dichloride (chloride for short) through a one-pot method in an alkaline solution. By the adoption of the one-pot method for reaction step by step to prepare the cartap, the synthesis method has the advantages of low equipment investment, low energy consumption, easiness and convenience for operation and substantial improvement of the conversion rate. According to the synthesis method, the use of organic raw materials such as sodium thiosulfate (sodium thiosulfate) and sodium cyanide is avoided, so that generation of a large amount of sewage containing sodium sulfite and sodium cyanide is avoided. The synthesis method substantially increases the selectivity and the conversion rate in a reaction process, thus improving the production efficiency and greatly reducing the production cost.

The invention discloses a method for preparing poly(monothiocarbonate). According to the method, carbon oxysulfide and oxygen-containing monomers are used as raw materials; a catalysis system consisting of initiators and Lewis acid is used; after the bulk polymerization or solution polymerization, poly(monothiocarbonate) is obtained; the oxygen-containing monomers are selected from at least one kind of materials of epoxy compounds, oxetane and 3-substituted oxetane; the initiators are selected from quaternary ammonium salt, quaternary phosphonium salts or organic alkali. The preparation method of synthesizing the poly(monothiocarbonate) through anion ring-opening polymerization by using a catalytic system formed by at least one kind of materials from quaternary ammonium salt, quaternary phosphonium salts or organic alkali, and the Lewis acid; the poly(monothiocarbonate) with the specific chain structures can be obtained through preparation. The catalysis system can be obtained only through compounding; the metal residue and color residue problems do not exist.

The invention belongs to the technical field of polymer materials, in particular to a polythiocarbamate and a preparation method thereof. The method provided by the invention uses carbon oxysulfide and 2-methylaziridine as raw materials, without using a catalyst, and can obtain polythiocarbamate by copolymerization under bulk or solvent conditions, and the reaction is preferably in the range of 0- carried out at a temperature of 120°C. The method developed by the invention has the following advantages: it can react by itself without a catalyst; the raw materials are cheap and easy to obtain, the synthesis is simple, and the toxic mercapto compounds and isocyanate compounds in the traditional system are not used; the prepared polythiocarbamate main chain The structure is clear and has a fully alternating structure; there are strong hydrogen bonds between molecules, excellent thermal properties, no metal residues and colorless; the synthesis process is simple and easy to operate, the reaction conditions are mild, the reaction rate is fast, and the reaction process is environmentally friendly. The material has a strong adsorption effect on heavy metal mercury ions, and can be used to adsorb mercury ions in water systems.

A system including a mechanism for releasing at least a portion of a sulfur containing compound into a formation; and a mechanism for converting at least a portion of the sulfur containing compound into a carbon disulfide formulation and / or a carbon oxysulfide formulation, the mechanism within the formation.

The invention belongs to the technical field of polymer materials, and in particular relates to a crystalline N-substituted polythiourethane and a preparation method thereof. The present invention uses carbon oxysulfide and N-substituted aziridine as raw materials to obtain crystallized N-substituted polythiourethane by copolymerization under bulk or solvent conditions. The method developed by the present invention has the following advantages: it can react itself without a catalyst; the raw materials are cheap and easy to obtain, and the synthesis is simple, without using toxic mercapto compounds and isocyanate compounds in the traditional system; the prepared N-substituted polythiocarbamic acid The main chain structure of the ester polymer is clear and has a fully alternating structure; the polymer is crystalline and has excellent thermal stability. The polymer is easy to recycle and reuse, and can be thermally degraded into a five-membered ring N-substituted thiocarbamate with application value, without any additional impurities or volatile pollutants, and is an environmentally friendly Recyclable specialty polymers.