115 results about "Sulphur compound" patented technology

The invention discloses a double dynamic bond self-repairing polyurethane elastomer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The elastomer is prepared from the following raw materials in percentage by mass: 74 to 76 percent of polyether polyol, 15.5 to 18 percent of diisocyanate, 1.67 to 7 percent of dihydrazide compound and 2.1 to 6.7 percent of disulfide. The preparation method comprises the following steps: firstly, reacting polyether polyol with diisocyanate to obtain a prepolymer, then sequentially carrying out step-by-step chain extension reaction on the prepolymer, the bishydrazide compound and the disulfide compound, and finally, curing and forming. According to the invention, a synergistic structure of a hydrogen bond hard segment and a disulfide bond soft segment is constructed step by step, so that the material has high mechanical properties and efficient self-repairing capability. The elastomer is suitable for the fields of industrial pipeline sealing pieces, flexible packaging films, sports equipment accessories and the like, and solves the problem that the strength and repairing performance of an existing self-repairing polyurethane material are difficult to balance.

The invention discloses a method for synthesizing a sulfur-containing compound by using an amino sulfur trifluoride compound, which comprises the following two steps: S1, by taking the amino sulfur trifluoride compound and a compound A as reactants, stirring and reacting for 8-15 minutes or 10-15 hours at normal temperature in an organic solvent under an alkaline condition; the compound A is any one of an amide compound or a sulfanilamide compound, or water; and S2, adding a nucleophilic reagent into the solution after the reaction in the step S1, stirring at normal temperature to react for 8-15 minutes or 5-8 hours, and then purifying through a rapid chromatography to obtain a final product, namely, all-heteroatom substituted thioimine or all-heteroatom substituted sulfoxide, the nucleophilic reagent is an alcohol or an amine. According to the method disclosed by the invention, the amido sulfur trifluoride compound is used for synthesizing the asymmetric full heteroatom substituted thioimine and sulfoxide compound for the first time, the reaction steps are simple, the reaction conditions are mild, and expensive reagents are not needed.

The present invention relates to a method of preparing an organosulfur compound, and more particularly, to a method of preparing an organosulfur compound including a step of synthesizing an organosulfur compound by reacting specific compounds with a metal hypohalite under a ruthenium catalyst in a mixed solvent containing water and an organic solvent, wherein the metal hypohalite is introduced in a solid state and a portion thereof reacts in an undissolved state. According to the present invention, the present invention has an effect of providing an organosulfur compound preparation method capable of preparing an organosulfur compound in high yield due to excellent reaction stability, short reaction time, and reduced side reactions.

The invention discloses an asymmetric disulfide reagent (R1O-SS-SO2R2) as shown in a formula (3) and a synthesis method thereof, R1O-SS-OR1 as shown in a formula (1) and hyposulfonic acid as shown in a formula (2) are taken as reaction raw materials, no catalyst additive is needed, and the asymmetric disulfide reagent (R1O-SS-SO2R2) compound is obtained through reaction. The method has the advantages of mild reaction conditions, cheap and easily available raw materials, simple reaction operation, high yield, no need of any catalyst additive in the reaction, economy, practicability and environmental friendliness; reaction substrates are easy to prepare; the reaction efficiency is high after reaction amplification. The asymmetric disulfide reagent (R1O-SS-SO2R2) provided by the invention can be used for preparing an asymmetric polysulfide compound. The invention also discloses an asymmetric polysulfide compound synthesized by using the asymmetric disulfide reagent (R1O-SS-SO2R2) as shown in the formula (3) and a synthesis method of the asymmetric polysulfide compound. The method has wide application prospect and practical value.

The present invention provides a bismuth sulfide which is easy to reflect infrared rays and has a blackness equivalent to or higher than that of carbon black. The present invention is a bismuth sulfide particle including agglomerated secondary particles formed by agglomeration of primary particles, and having a cumulative 50% particle diameter (D1) of 0.2 μm or more and 10 μm or less in a volume cumulative distribution measured by a laser diffraction / scattering particle size distribution measuring device. The present invention includes a process of heating a bismuth compound and a sulfur compound in a dispersion medium in the presence of a protective agent at 30°C or higher and 100°C or lower.

The present invention relates to a process for the production of specialty mercaptans from C4 oligomerization product. The oligomer product from the commercial C4 oligomerization process is separated in desired fractions of C8 and C12 olefins and these streams are further used as feed stock for the production of the specialty mercaptans such as tert octyl mercaptan (TOM) & tert dodecyl mercaptan (TDM). These fractionated oligomer stream (C8 and C12) from the C4 oligomerization process reacts with hydrogen sulfide in presence of pretreated cation exchange resin catalyst using appropriate inhibitors such as amine precursors, nitriles and metals to produce respective sulfur compounds tert-octyl mercaptan (TOM) and tert dodecyl mercaptan (TDM).

This invention proposes a method and application for the rapid co-crystallization of liquid sulfur-containing compounds using a trinuclear mercury crystallization chaperone, belonging to the field of crystal engineering technology. The invention involves mixing a trinuclear mercury crystallization chaperone with a liquid sulfur-containing compound to form a host-guest mixture, which is then dropped onto a transparent substrate in droplet form. The substrate is then placed in an open environment at room temperature to allow the droplets to evaporate naturally, resulting in a host-guest co-crystallized crystal suitable for single-crystal X-ray diffraction testing. This invention utilizes the directional interaction between the trinuclear mercury complex and the sulfur-containing guest compound to form a micro-droplet system of the sulfur-containing liquid guest compound and the trinuclear mercury crystallization chaperone on a transparent substrate. This system allows for rapid evaporation, enrichment, nucleation, and growth in an open environment at room temperature, thereby obtaining a host-guest co-crystallized crystal suitable for single-crystal X-ray diffraction testing within minutes to tens of minutes. The method of this invention has the advantages of rapid operation and wide applicability.

The invention relates to a system and a method for simultaneously and continuously measuring trace sulfur-containing compounds and carbon-containing compounds in hydrogen on line. The system comprises a sample inlet, a carbon-containing compound detection unit and a sulfur-containing compound detection unit, wherein the carbon-containing compound detection unit and the sulfur-containing compound detection unit are connected with the sample inlet in parallel; the carbon-containing compound detection unit comprises a first controller, a first sample injector, a quantitative loop, a first chromatographic column and a first enhanced plasma discharge detector which are communicated in sequence; the sulfur-containing compound detection unit comprises a second controller, a second sample injector, a trapping trap, a second chromatographic column and a second enhanced plasma discharge detector which are communicated in sequence. According to the system disclosed by the invention, qualitative and quantitative analysis of trace sulfur-containing compound and carbon-containing compound impurities in to-be-detected sample gas can be completed at the same time only through one-time sample introduction; and by using the system disclosed by the invention, the detection lower limit of the sulfur-containing compound and the carbon-containing compound is lower, and the detection error is small.

The invention relates to the technical field of batteries, in particular to a battery which comprises a positive plate, a negative plate and an electrolyte, the electrolyte comprises a solvent and an additive, the solvent comprises fluorinated chain carbonate and fluorinated carboxylic ester, the additive comprises a first additive, and the first additive comprises a polycyclic sulfur-containing compound; on the basis of the total mass of the electrolyte, the mass content of the fluorinated chain carbonate accounts for 1%-42%, and the mass content of the fluorinated carboxylic ester accounts for 3%-40%; based on the total mass of the electrolyte, the mass content of the first additive accounts for 0.1-5%. Even under the high-voltage working condition that the charging cut-off voltage is larger than or equal to 4.5 V, the high-temperature cycle performance and the high-temperature thermal expansion performance of the battery can be guaranteed, the low-temperature cycle performance is considered, and balanced optimization of the high-temperature and low-temperature comprehensive performance is achieved.

The invention discloses a phosphabicyclo [3, 2, 0] organic phosphorus compound as well as a preparation method and application thereof. Diallyl-containing tertiary phosphine oxide and phosphine sulfur compounds are used as raw materials, 10-phenyl phenothiazine is used as a photocatalyst, the photocatalyst is excited under a light source of 390 nm to activate double bonds, high-stereoselectivity [2 + 2] cycloaddition reaction is realized, the phosphorus heterocyclic bicyclo [3, 2, 0] organophosphorus compound containing two quaternary carbon centers is synthesized, diastereoisomers can be separated, and the yield is high. A single diastereoisomer product is as high as 97%, and excellent diastereoselectivity is achieved. The invention provides a green reaction mode for photocatalytic synthesis of the phosphabicyclo [3, 2, 0] organophosphorus compound, the conditions are mild, and the substrate universality is good. The obtained phosphabicyclo [3, 2, 0] organophosphorus compound is applied to a primary alcohol chlorination reaction as a catalyst, shows high reaction activity, and has more excellent catalytic activity compared with a reported catalytic system.

The invention relates to the use of basic salts of sulfur compounds, in particular amino acids having a thiol function, such as cysteine or homocysteine, as metal corrosion inhibitors, in particular in the petroleum, natural gas and / or mining industry. The invention also relates to an anti-corrosion formulation comprising a basic salt of a sulfur compound, and to the use thereof in the fields of petroleum, natural gas and / or mining industry.

The invention relates to an adhesive composition comprising: a) At least one polymer P, b) A stabilizer S comprising b1) At least one first stabilizer S1 and b2) At least one second stabilizer S2, which is different from the at least one stabilizer S1 wherein the first stabilizer S1 is a non-sulfur containing compound having at least two phenolic groups selected from ethylenebis(oxyethylene) bis[3-(5-tert-butyl-4-hydroxy-m- tolyl)propionate] and pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionate)the second stabilizer S2 is a sulfur containing compound selected from thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxy-phenyl)propionate] and dilauryl 3,3'-thiodipropionate; wherein the at least one polymer P is selected from at 25 °C solid non-functionalized and functionalized polyolefins;

The application discloses a selenium nutrient composition and a simple preparation method thereof, and belongs to the technical field of selenium-containing food processing. The selenium nutrient composition is prepared from ordinary garlic processing by-products and selenium-rich water as raw materials, and high-efficiency selenium enrichment is realized in one step by adopting a supercritical extraction technology, and selenium-rich garlic powder, garlic essential oil and garlic crude extract are simultaneously prepared. The raw materials are easy to obtain, the process is simple, green and environment-friendly, and the utilization rate of garlic resources is greatly improved. By adjusting process parameters such as the amount of selenium-rich water and the extraction time, the selenium content of the selenium-rich garlic powder can be accurately customized to adapt to the individual selenium supplement needs of different groups of people. The extraction process effectively separates sulfur compounds in garlic, significantly reduces the pungent smell of the product, and the product has better palatability. The prepared selenium nutrient composition can be widely applied to various food processing such as tablet candies and solid beverages, and has the advantages of nutrition, practicability and industrialization promotion value.

The disclosure relates to organosulfur compounds and compositions comprising same. In particular, the disclosure relates to Bis(4-fluorophenyl) disulfide, Bis(4-chlorophenyl) disulfide, Bis(4-chlorophenyl) thiosulfinate, Bis(4-fluorophenyl) thiosulfinate, Bis(4-chlorophenyl) thiosulfonate, Bis(4-fluorophenyl) thiosulfonate, and Di-isopropyl thiosulfonate. Such compositions are useful for treating microbial infection, in particular bacterial, fungal, rotozoan or algal infection. Compositions comprising said compounds are also provided for cleaning, disinfecting or agricultural use.

The application discloses a microemulsion containing plant polyphenols and a preparation method and application thereof. The microemulsion comprises plant polyphenols, a main emulsifier, a co-emulsifier, oil and water. The co-emulsifier is combined by a sulfur-containing compound and a polyhydric alcohol, wherein the sulfur-containing compound comprises one or more of thioctic acid, cystine and cysteine. The application provides a preparation method of the microemulsion containing plant polyphenols for cosmetics and medicines. The application can greatly improve the solubility, stability, antioxidant property and transdermal efficiency of the plant polyphenol active substance, and improves the bioavailability of the plant polyphenol active substance in the field of cosmetics and medicines.

A method for grinding a sulfur compound. The method satisfies a relationship represented by inequality (1): D2 / D1<0.49 wherein D1 represents the median diameter of the unground sulfur compound when the grinding includes only a single pass of grinding or, when the grinding includes two or more passes of grinding, the median diameter of the sulfur compound before any pass of grinding; and D2 represents the median diameter of the sulfur compound after grinding when the grinding includes only a single pass of grinding or, when the grinding includes two or more passes of grinding, the median diameter of the sulfur compound after the any pass of grinding.

The application belongs to the technical field of catalysts, and particularly relates to a high-performance palladium-carbon catalyst and a preparation method thereof. The application effectively removes impurities on the surface of activated carbon, enlarges the specific surface area and pore structure of the carrier, and introduces a large number of functional groups by high-temperature calcination, acid pickling and modification treatment of the activated carbon; the activated carbon is modified by using amine compounds and sulfur-containing compounds to introduce amino groups and mercapto groups on the surface of the activated carbon, thereby improving the adsorption capacity of the activated carbon for palladium; a small amount of citric acid is added into a palladium salt solution to avoid the precipitation of palladium ions, form large-particle-size palladium particles, and improve the dispersion degree of palladium.

The application provides a polymerized sulfur compound and a preparation method thereof, and a method for denitrification of sewage by using the polymerized sulfur compound, the polymerized sulfur compound is prepared from elemental sulfur and oil containing unsaturated fatty acids, the preparation method is simple, the polymerized sulfur compound is used as a filler of a biological filter, and the processes of heterotrophic denitrification for generating alkalinity and sulfur autotrophic denitrification for generating acidity can be simultaneously carried out, so that the pH of the reaction system can be better maintained in a neutral range, compared with a denitrification filter which needs to add an external organic carbon source, the biological filter using the polymerized sulfur compound as the filler does not need to add the external organic carbon source, secondary pollution can be effectively avoided, and the biological filter has the advantages of high nitrate removal rate and high total nitrogen removal load.

The invention discloses a beta-pyridine alkyl phosphine sulfur compound as well as a preparation method and anti-tumor application thereof, and belongs to the technical field of organic synthesis and application. The structural formula of the beta-pyridine alkyl phosphine sulfur compound is shown in the specification. Wherein R1 is aryl or heteroaryl; r2 is methyl or hydrogen; r3 is methyl, chlorine or fluorine; and R4 is a phenyl group, a 3.5-dimethyl phenyl group or a cyclohexyl group. An olefin compound, a 4-cyanopyridine compound, powdered sulfur and a disubstituted phosphine hydrogen compound are used as reaction raw materials, alkali and a photocatalyst are added, a blue LED lamp irradiation reaction is performed in an inert atmosphere, and a reaction solution is concentrated, separated and purified to obtain the beta-pyridine alkyl phosphine sulfur compound. The beta-pyridine alkyl phosphine sulfur compound has human liver cancer cells HepG2 and has obvious anti-tumor activity.

To provide a uniform-type platinum-loaded alumina catalyst demonstrating excellent performance in terms of catalyst life, a uniform-type platinum-loaded alumina catalyst includes: an alumina carrier; sulfur or a sulfur compound dispersed over an entire cross section of the alumina carrier; platinum dispersed and loaded over the entire cross section of the alumina carrier; one or more alkali metals selected from the group consisting of sodium, potassium, and calcium. Preferably, the content of platinum is 0.05 to 5.0 wt % calculated as elemental platinum. The content of the sulfur or the sulfur compound preferably is 0.15 to 5.0 wt % calculated as elemental sulfur. The content of the alkali metal preferably is 0.1 to 5.0 wt % calculated as elemental alkali metal.

A masking composition for masking non-animal derived protein off-notes is provided. The making composition includes a) a mixture of a Lamiaceae extract together with vitamin C, the extract and the vitamin C having an admixed ratio of from 1:1 to 1:20; b) one or more peptides; c) an extract obtained or obtainable from a plant of the coffea genus; d) an umami-imparting modifier, and e) one or more masking agents selected from the group consisting of fatty acids, terpenes, carbonyls, sulfur compounds, sweet browns, esters, sweeteners, lactones, juice derivatives and combinations thereof.

The application discloses a chiral thioimine lipid compound and a preparation method and application thereof, and the preparation method comprises the following steps: stirring sulfenamide, isobutyl alcohol, MS, a metal center chiral cobalt (III) complex anion and super-dry tetrahydrofuran at-40 DEG C for 30 minutes, then adding N-iodosuccinimide, and reacting at the same temperature for 36 hours; after the reaction is completed, the reaction is quenched by using an aqueous Na2S2O3 solution, and the chiral thioimine lipid compound is obtained through separation and purification; the chiral thioimine lipid compound prepared by the application provides a robust and practical method for solving the challenging asymmetric problem in sulfur stereochemistry, and opens up a road for a new type of chiral sulfur-containing compound which has a wide application in the fields of medicine and pesticides.

To provide a sulfur compound detector and detection method, which enable highly sensitive and easy measurement of sulfur compounds contained in a gas.SOLUTION: A sulfur compound detector of the present invention comprises a detection agent and a detection agent carrier carrying the detection agent. The detection agent contains a disulfide compound having a disulfide in a molecule and salts of a weak acid and a strong base. The detection agent carrier comprises fiber.SELECTED DRAWING: Figure 1

Sulfur-containing compounds are removed from crude CO2 by conversion to elemental sulfur in a Claus process and subsequently by hydrogenation of the Claus tail gas to convert residual sulfur-containing compounds into H2S which, after cooling to knock out water and then compressing, is removed, together with any other sulfur-containing impurities, either by physical separation or by chemical reaction with a solid metal oxide to form solid metal sulfide with subsequent oxidative regeneration to produce purified CO2 and a recycle gas comprising at least one sulfur-containing compound which is recycled to the Claus process. Some H2S in the Claus tail gas may be removed initially by selective and / or non-selective amine absorption(s) in a tail gas treatment unit prior to removal of residual H2S and any other residual sulfur-containing impurities by the physical separation or the chemical reaction steps.

The present technology relates to a method of treating crude methanol comprising the steps in temporal order of distilling the crude methanol to remove at least a portion of one or more sulphurous compounds from the crude methanol and provide a methanol-rich stream, contacting the methanol-rich stream with an oxidant, whereby at least a part of the sulphur compounds in the stream is oxidized, and contacting the methanol-rich stream with an acidifying agent, whereby ammonia present in the stream reacts to form ammonium sulphate in a methanol- rich stream, essentially free of polymerised terpenes.

This invention relates to a polymerizable disulfide, its preparation method, and its uses, belonging to the fields of polymer chemistry and photopolymerization. It is proposed based on the significant volume shrinkage inherent in LED free radical photopolymerization. The beneficial effects of this invention are that the disclosed polymerizable disulfide compound can reduce the volume shrinkage of 405nm LED light-induced free radical photopolymerization, while also possessing initiation and polymerization properties. Furthermore, this disulfide can improve the heat resistance of photocurable materials, showing great application potential in the field of LED photopolymerization.

The invention provides a triazaaryl phosphine-sulfur compound and a preparation method thereof.The triazaaryl phosphine-sulfur compound shown in the formula (I) is an organic phosphine compound of a triazaaryl phosphine-sulfur structure directly synthesized through white phosphorus, and the process avoids the problems that chlorine with great pollution is used in traditional phosphorus chemical industry production and subsequent emission is caused; and the method is a more environment-friendly production method. In addition, the method disclosed by the invention is simple in step, mild in reaction condition and simple in post-treatment, and the yield of medium or above can be obtained.

A method for purifying biogas to biomethane, comprising the following successive steps: (a) passing raw biogas through a first buffer tank (Z1) equipped with a demister and an activated‑carbon filter (F1) and compressing the pre‑purified gas in a compressor (C1) to 6-12 bar; (b) raising the temperature of the compressed biogas to 200–300 °C; (c) removing sulphur compounds in one or more desulphurization reactors (R1, R2) filled with a zinc‑oxide (ZnO) sorbent bed at 200–300 °C; (d) cooling the desulphurized gas to 30–40 °C while condensing and removing liquid; (e) upgrading the cooled gas in a two-stage pressure-swing adsorption (PSA) unit (A1–A8) containing sorbents for CO₂, N₂ and O₂, wherein in the first stage (A1–A4) adsorption is carried out at line pressure, producing biomethane with ≥ 98 vol % CH₄, which is forwarded to a gas grid or to a condensate tank (S1), and in the second stage (A5–A8), vacuum pressure‑swing adsorption (vPSA) is performed at (−1) to 25 kPa, the methane‑rich product being recycled to the suction side of the compressor (C1); and (f) catalytically oxidizing the residual methane contained in the PSA off‑gases in a methane-oxidation reactor (R3) using air, oxygen‑enriched air or pure oxygen.

The present invention provides an agent which is for imparting or enhancing an oil / fat cooking aroma, which can be used for foods, drinks, or seasonings in general, and which comprises: 2,4-dienal and / or one or more of n-saturated aldehydes as an active component; one or more of α-amino acids, proline, lysine hydrochloride, cysteine, and glutathione as a key component (component A); and, as a sub component, a component B that is constituted by one or more components from among unsaturated aldehydes, 1-octen-3-ol, and (Z)-6-dodecen-4-olide and / or a component C that is constituted by one or more components (component C-1) from among sulfur compounds and 3-mercaptopropionic acid and one or more hydroxyketones (component C-2).　When the active component is an n-saturated aldehyde, the agent for imparting or enhancing an oil / fat cooking aroma comprises one or more of dicarbonyl compounds as a second key component (component D).

Electrolytes and electrolyte additives for energy storage devices comprising fluorinated electrolyte additive compounds are disclosed. The energy storage device comprises a first electrode and a second electrode, where one or both of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte, and at least one electrolyte additive selected from a linear carbonate, a cyclic carbonate, a linear carboxylic ester, a linear ether, a linear acetate, a sulfone, a linear anhydride, a cyclic anhydride, a phosphate, a phosphite, a phosphorus-containing compound, a phosphazene, a cyclic phosphazene, a nitrogen-containing compound, a silicon-containing compound, a sulfur-containing compound, a Li salt compound, a metal salt compound, fluorine salt compound, or combinations thereof, which may be partially or fully fluorinated and may be optionally substituted.