41 results about "Carbon oxysulfide" patented technology

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 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 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.