272 results about "Sulphur compound" patented technology

The invention provides an electrolyte and a silicon-based lithium ion battery. The electrolyte comprises a lithium salt, an organic solvent and an additive, the mass ratio of the additive in the electrolyte is 0.1%-10%, and the additive comprises a sulfur-containing compound and a silazane compound. The sulfur-containing compound has stronger electrochemical reduction tendency and can be preferentially reduced to generate an SEI film, meanwhile, the formed SEI comprises Li2SO3, CH3CH (OSO2Li) and the like, and the components can improve the stability of the SEI film and inhibit the volume expansion of the silicon negative electrode. The silazane compound can form a protective film containing a silicon-nitrogen bond on the surface of the negative electrode, so that the thermal stability and the electrochemical stability of the electrolyte are improved. According to the electrolyte formula disclosed by the invention, the problem of poor cycling stability of the silicon-based lithium ion battery is effectively solved by controlling the types and the concentrations of the additives and utilizing the synergistic effect, and the first effect of the silicon-based lithium ion battery is also improved.

The invention belongs to the technical field of catalysts, and particularly relates to a high-performance palladium-carbon catalyst and a preparation method thereof. The activated carbon is subjected to high-temperature roasting, acid pickling and modification treatment, impurities on the surface of the activated carbon are effectively removed, the specific surface area and the pore structure of the carrier are enlarged, and meanwhile a large number of functional groups are introduced; the activated carbon is modified by adopting an amino compound and a sulfur-containing compound, and amino and sulfydryl are introduced to the surface of the activated carbon, so that the palladium adsorption capacity of the activated carbon is improved; a small amount of citric acid is added into the palladium salt solution, palladium ion precipitation is avoided, large-particle-size palladium particles are formed, and the dispersity of palladium is improved.

A desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid containing moisture and the sulfur compound, the desulfurizing agent comprising: at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions; and an organic ligand coordinated to a metal ion, the organic ligand containing isophthalic acid optionally having a substituent group at the 5-position of a benzene ring, and diffraction peaks respectively present in the range of diffraction angles of 10.9 DEG + / -0.3 DEG and the range of diffraction angles of 18.1 DEG + / -0.3 DEG in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-K alpha rays.

The invention relates to the technical field of organic synthesis, and discloses a method for synthesizing a pyroxasulfone intermediate. In the presence of a first solvent and a first catalyst, carrying out first reaction on the compound shown in the formula IV and a chloromethylation reagent to obtain a compound shown in a formula III; in the presence of a third solvent, carrying out third reaction on the compound shown in the formula III and a sulfur compound to obtain a compound shown in a formula II; and in the presence of a fourth solvent, a second catalyst and a second alkali, carrying out fourth reaction on the compound in the formula II and a halogenated isoxazoline derivative to obtain the compound in the formula I. The method for synthesizing the pyroxasulfone intermediate provided by the invention solves the problems of high risk, environmental pollution and the like in the prior art, the reaction route is short, the whole process is mild in reaction condition, simple to operate and short in reaction time, and the product obtained by the reaction is high in purity, easy to separate, high in yield, low in discharge of three wastes, environment-friendly, low in production cost and suitable for industrial production. The method is suitable for industrial mass production.

The invention discloses a method for determining the content of bis (2-aminophenyl) disulfide in 2-aminothiophenol. The method comprises the following steps: preparing an acetonitrile solution of citric acid as a diluent; preparing a system applicability solution, a reference solution and a test solution by using a diluent; a diluent, a system applicability solution, a reference substance solution and a test solution are sequentially injected by adopting a liquid chromatography, and the content of bis (2-aminophenyl) disulfide in a 2-aminothiophenol sample is determined by adopting an external standard method. The antioxidant citric acid is added into the diluent, so that the generation of the disulfide compound is inhibited, the existing disulfide compound is not damaged, the solution stability is high, the operation is simple, the system applicability, specificity, accuracy, precision and durability completely accord with the guidance principle verified by the Chinese pharmacopoeia method, and the method is suitable for industrial production. The method can be used for quality control of 2-aminothiophenol.

The invention discloses a method for preparing electrolytic manganese dioxide from low-grade manganese oxide ore, the electrolytic manganese dioxide and application of the electrolytic manganese dioxide, and belongs to the technical field of battery materials. The method comprises the steps that S1, the low-grade manganese oxide ore is subjected to two-stage countercurrent acid leaching, and a leaching solution is obtained; s2, adjusting the pH value of the leachate, synchronously introducing air, adding a flocculating agent, and settling to remove iron and aluminum; s3, heavy metal is deeply removed, calcium and magnesium are removed through manganese fluoride, and then an oxidizing agent is added for oxygenolysis of polysulfide; s4, anolyte generated in the electrolysis process is added into the purified solution, Mn < 2 + > is subjected to catalytic oxidation through a catalyst, and generated authigenic MnO2 adsorbs residual impurities; and S5, pulse on-off current and periodic reversing are adopted for electrolysis, cathode waste liquid is reused for the leaching procedure in the S1, and electrolytic manganese dioxide is obtained. The electrolytic manganese dioxide with high purity and excellent electrochemical performance is successfully prepared through the specific steps of acid leaching iron removal, heavy metal removal, oxidation reaction, electrolysis and the like.

The invention concerns a composition comprising a fluoropolymer, a silicon-sulfur compound, a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, and a solvent or a mixture of solvents and methods for the preparation thereof and for preparing a coated substrate by applying said composition.

The invention discloses a hydrodesulfurization catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier, an organic hydrogenation active metal compound and an organic sulfur-containing compound, wherein the organic sulfur-containing compound is selected from at least one of benzothiophene sulfur-containing compounds, dibenzothiophene sulfur-containing compounds or naphthothiophene sulfur-containing compounds containing substituent groups and / or functional groups. The preparation method of the hydrodesulfurization catalyst comprises the following steps: preparing an impregnation liquid containing an organic sulfur-containing compound and an organic hydrogenation active metal compound; and impregnating a carrier with the impregnation liquid, and drying to obtain the catalyst. The catalyst is used in the hydrodesulfurization process of distillate oil, and the deep hydrodesulfurization activity can be obviously improved.

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 provides a sulfide solid-state battery high-nickel ternary positive electrode material and a modification method thereof, and relates to the technical field of lithium batteries. According to the invention, excessive lithium source is added during primary sintering of the high-nickel ternary material, so that more residual alkali exists on the surface of the product after primary sintering, uniformly coated lithium phosphate is formed on the surface in situ through the reaction of the residual alkali on the surface and phosphoric acid, and then the lithium thiophosphate coated high-nickel ternary positive electrode material is formed through the reaction of the lithium phosphate and a phosphorus-sulfur compound; the lithium thiophosphate material is uniformly coated on the surface of the high-nickel ternary positive electrode material through a simple and low-cost method, so that the stability and the ion transmission capability of the positive electrode material in a sulfide solid-state battery can be improved; the obtained lithium thiophosphate-coated high-nickel ternary positive electrode material can be used for sulfide solid-state batteries, and can be applied to the fields of power batteries and energy storage batteries.

The invention concerns a monolayer comprising a fluoropolymer, a silicon-sulfur compound, and a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, an assembly comprising a substrate and said monolayer, a method for preparing said monolayer, a component comprising said monolayer and a device comprising said component.

The invention relates to a refractive index adjustable optical material composition and a preparation method thereof, and belongs to the technical field of optical materials, the refractive index adjustable optical material composition comprises the following raw material components by weight: 25-50 parts of isocyanate, 20-45 parts of a trithiol compound, and 15-45 parts of a bis (2, 2-methylene disulfide) episulfide compound. According to the invention, the 2, 2-(methylene bidisulfide)-bicyclic sulfur compound with ultrahigh sulfur content and stable bicyclic structure, which has higher refractive index and lower chromatic dispersion, is utilized to form a high cross-linked network in the in-situ polymerization process with isocyanate, so that the high transparency of the polymer material is ensured, and the service life of the polymer material is prolonged. An optical material composition with a higher refractive index can be prepared from the compound and high-sulfur-content mercaptan, and the refractive index is adjusted through content adjustment, so that the problems of complex process, high cost and poor refractive index of the existing optical material composition are solved.

The invention relates to the technical field of solid-state batteries, in particular to electrolyte slurry and a preparation method thereof, a solid-state electrolyte film and a diaphragm-free all-solid-state battery. The electrolyte slurry is mainly prepared by blending and modifying a first polymer, an inorganic solid electrolyte, inorganic ceramic, a second polymer and a lithium salt; the first polymer is a polysulfide compound, and the polysulfide compound comprises one or more of a monosulfide polymer, a disulfide polymer and a polysulfide polymer. The polysulfide is introduced into a raw material system, so that the electrochemical performance and the high-temperature stability of the solid-state battery can be further improved.

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 invention relates to a bis (2, 2-methylene disulfide) episulfide compound with an ultrahigh refractive index and a preparation method thereof, and belongs to the technical field of optical materials, and the preparation method comprises the following preparation steps: taking chloroacetaldehyde dimethyl acetal, a solvent, disulfur dichloride and an acidifying agent, and carrying out a sulfuration substitution reaction to prepare 2-chloro-1, 2-dithiol; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on methoxycarbonyl sulfonyl chloride, a low-boiling-point solvent and 2-chloro-1, 2-ethanedithiol, and dropwise adding a bicarbonate saturated aqueous solution to carry out cyclization reaction so as to prepare a methoxycarbonyl disulfide-episulfide compound; and adding dimercaptomercaptan, and reacting to obtain a product. The process route provided by the invention solves the problems of tedious step-by-step reaction, more byproducts and high cost in the prior art.

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.

A method for improving lifespan of a methane oxidation catalyst employed in a methane reduction step. The method comprises: providing a feed gas stream (102) comprising methane (CH4) and at least one sulfur-containing compound to a methane abatement unit (100) comprising a guard bed (104) upstream of a methane oxidation bed (106). The guard bed (104) comprises hopcalite to capture an amount of the at least one sulfur-containing compound from the feed gas stream (102), and the methane oxidation bed (106) comprises a methane oxidation catalyst to remove an amount of the methane.

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.

A liquid treatment composition for remediating and removing mercaptans, H2S and other sulfur based contaminants from contaminated hydrocarbon liquids, the treatment composition consisting essentially of a carrier solvent and at least one alkoxide compound. The liquid treatment composition may contain no terpene. Further, the liquid treatment composition may include water. The at least one alkoxide compound includes at least one of sodium methoxide and sodium ethoxide.

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.

To provide technique capable of removing sulfur-containing compounds in liquid while preventing the loss of the color in the liquid.SOLUTION: An adsorption filter for sulfur-containing compounds contains a layered double hydroxide and adsorbs sulfur-containing compounds contained in liquid.SELECTED DRAWING: Figure 1

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 provides an electrolyte and a battery. The electrolyte comprises a first additive and a second additive, and based on the total mass of the electrolyte, the addition amount of the first additive is 0.1 wt%-10 wt%; the first additive comprises a compound shown in a formula I, the second additive comprises a polycyclic sulfur-containing compound, and the polycyclic sulfur-containing compound comprises a cyclic carbonate group and a cyclic sulfate group. According to the electrolyte provided by the invention, the specific first additive and the second additive are combined, so that the battery has good high-temperature safety performance and cycling stability.

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.

A liquid treatment composition for remediating and removing mercaptans from contaminated hydrocarbon liquids, the treatment composition including a hydrocarbon liquid, at least one alkoxide compound, and at least one terpene. A collective content of the at least one alkoxide compound in the liquid treatment composition is in a range of 1-20 wt % weight, a collective content of the at least one terpene in the liquid treatment composition is 5-25 vol %, a content of the hydrocarbon liquid in the treatment solution is 50-90 vol %.

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 present invention belongs to the field of chemical engineering and specifically relates to a method for enriching and separating mercaptan-containing sulfur compounds in a xylene product produced by hydrogenation of coking benzene. The method comprises: oxidizing the xylene product with iodine or oxygen as an oxidant to convert the mercaptan compounds in the xylene product into disulfide compounds; utilizing the large difference in boiling points between the disulfide compounds and xylene, the majority of the xylene is separated by distillation, thereby achieving enrichment and separation of the mercaptan compounds. The method for enriching and separating the mercaptan-containing sulfur compounds is simple, low-cost, and well-suited for industrial production.