230 results about "Thiol" patented technology

The invention belongs to the technical field of organic synthesis, and particularly relates to an alkyl pentafluorosulfenyl compound and a preparation method and application thereof.The preparation method comprises the following steps that in the protective gas atmosphere, in a solvent, SF5Cl serves as a pentafluorosulfenyl source, an olefin compound serves as a reaction substrate and a free radical trapping agent, a thiol compound serves as a hydrogen source, and the alkyl pentafluorosulfenyl compound is obtained through a one-step reaction; under the action of an olefin additive, the alkyl pentafluorothio compound is constructed by a one-step method through a visible light-induced free radical process, and the olefin additive is used for inhibiting generation of a pentafluorothio chloride byproduct from a pentafluorothio source and an olefin compound. According to the method disclosed by the invention, a series of alkyl pentafluorosulfenyl compounds can be prepared by only needing olefin double bonds in substrates and selecting more substrates through the reaction, the reaction is simple, the reaction condition is mild, the reaction can be completed under visible light, the reaction time is short, the implementation is easy, and the method is suitable for industrial production. And a method support is provided for further screening the alkyl pentafluorosulfenyl compound with excellent biological activity.

The invention discloses a mercaptan-coated proton exchange membrane fuel cell cathode catalyst slurry, a preparation method and a membrane electrode, and the method comprises the following steps: step 1, dispersing carbon black in a water-alcohol solution and a surfactant to obtain a carbon black solution; 2, respectively preparing a platinum precursor solution and a cobalt precursor solution; 3, mixing the carbon black solution, the platinum precursor solution and the cobalt precursor solution, removing the solvent, and performing thermal reduction in reducing gas to obtain a binary ordered alloy catalyst; the temperature of the thermal reduction ranges from 700 DEG C to 1000 DEG C, and the time ranges from 0.5 h to 2 h. Step 4, dissolving the mercaptan powder in a mixed solvent of deionized water and isopropanol according to a ratio of 1: 1 to prepare a 1wt% mercaptan-containing solution; then, cooling the solution to 5 DEG C until solid substances are completely dissolved; and step 5, fully mixing the catalyst with the prepared mercaptan solution. And step 6, removing excessive mercaptan, and centrifuging the solution at the rotating speed of 10000 revolutions per minute for 10 minutes. And drying the precipitate in a vacuum drying oven for 12 hours to obtain the catalyst. The mercaptan-coated binary alloy catalyst prepared by the method can avoid poisoning effect of sulfonate radicals on Pt, improves expression of catalyst activity, and is helpful for improving performance of a fuel cell.

The present invention relates to a method for producing methyl mercaptan, comprising the following steps: A) methanol is reacted with hydrogen sulfide to form a stream (M), preferably in the gas state, comprising methyl mercaptan, unreacted H2S and possibly sulfur-bearing by-products; B) optionally, said stream (M) is condensed; C) at least one step of purifying said stream (M) is carried out in order to obtain a methyl mercaptan-enriched stream; D) the gaseous effluents resulting from said at least one purification step are recovered, said gaseous effluents comprising at least one sulfur-bearing compound, preferably H2S; E) a gas-liquid extraction of said at least one sulfur-bearing compound, preferably H2S, is carried out using liquid methanol so as to obtain a liquid methanol enriched in sulfur-bearing compound(s), preferably in H2S; and F) optionally, said enriched methanol is used as a reactant for the reaction of step A).

Disclosed are methods of curing a composition. The method includes exposing the composition to electromagnetic radiation generated by a laser to cure the composition. The composition includes a thiol-terminated compound and an oxidant. Also disclosed are substrates comprising a coating formed from a composition cured by the disclosed methods.

The preparation method specifically comprises the following steps: S1, respectively dissolving Cd < 2 + > salt powder, sulfydryl molecule powder and alkaline powder in deionized water, S2, mixing and stirring a prepared Cd < 2 + > salt aqueous solution and a sulfydryl molecule aqueous solution in a flask for 3-5 minutes, and uniformly mixing to obtain a primary reaction system; s3, adding an alkaline aqueous solution into the primary reaction system to adjust the pH value, so as to obtain a final reaction system; s4, placing the final reaction system in a magnetic stirrer, heating in a water bath at a constant temperature of 37-90 DEG C, and reacting for 20-120 minutes to obtain a crude product of the cadmium nanocluster; and S5, putting the obtained crude product solution into a dialysis membrane, and dialyzing and purifying in deionized water for 24 hours to obtain the final cadmium nanocluster protected by the sulfydryl molecules. The method is simple, convenient and efficient, the obtained cluster is good in monodispersity, and reference is provided for preparation of the high-performance cadmium nanocluster.

The invention discloses a functionalized polycarbonate material and a preparation method thereof, and belongs to the field of high polymer materials. The material takes carbon dioxide as a green monomer, double-bond active sites are pre-buried in a polycarbonate main chain through ring-opening copolymerization, and carboxyl, amino or heterocyclic functional side chains are efficiently grafted through thiol-ene click reaction. The preparation method comprises the following steps: under the action of a composite catalyst, copolymerizing a double-bond-containing monomer, propylene oxide and COO to synthesize a precursor; and driving the sulfydryl monomer to carry out click reaction through thermal or photo-initiation. The innovation point lies in that the limitation of traditional protection / deprotection is broken through, multiple functions are integrated, hydrophilic carboxyl, antibacterial amino and conductive thiophene group have a synergistic effect, meanwhile, high mechanical strength and controllable degradability are kept, and the preparation method is suitable for the fields of biomedicine and electronics.

The invention discloses a tellurium-based nano material capable of efficiently inducing copper death as well as a preparation method and application of the tellurium-based nano material. The preparation method comprises the following steps: by taking water as a medium, mixing soluble copper salt and a sulfydryl-containing compound, and stirring to react, so as to obtain a Cu-S2 solution; dropwise adding the Cu-S2 solution into the TeO2 nano-carrier solution, and carrying out stirring reaction; and after the reaction is finished, carrying out solid-liquid separation, taking the solid, and resuspending with methanol to obtain the TeO2 coated Cu-S2 nano material. The preparation method is simple and rapid, large-scale production can be achieved, and the obtained TeO2 coated Cu-S2 nano material can efficiently induce cancer cells to generate copper death, is effective to various cancer cells and has potential clinical transformation application prospects.

The invention discloses a method for removing sulfur-containing compounds in a crude oil-prepared cracked gas C3 fraction. The method comprises the following steps: contacting the crude oil-prepared cracked gas C3 fraction with a supported desulfurizer, wherein the load type desulfurizing agent comprises a carrier and a main active component loaded on the carrier; the main active component comprises alkali metal and / or alkaline earth metal; the carrier comprises elementary substances Ag, Ag2O, elementary substances Re and ReOx; reOx is a mixture of a plurality of Re oxides, x = n / 2, and n is 4, 6 or 7; the molar content of the elementary substance Re accounts for 30-45% of the total molar weight of Re in the carrier. The method provided by the invention can effectively remove low-carbon thioether and / or low-carbon mercaptan in the C3 fraction of the crude oil-prepared pyrolysis gas, has the advantages of low removal temperature, simple process, no additional reaction, no influence on downstream hydrogenation and separation processes, and energy consumption saving, and the desulfurizer can be repeatedly regenerated and used, and has long-period stable operation capability.

A two-component silicone composition including a component (A) including at least one hydroxyl-terminated polydiorganosiloxane (P); preferably at least one filler; between 0.05% and 5.0% by weight of emulsified water, based on component (A); and a component (B) including at least one noncondensable polydiorganosiloxane (W) as a plasticizer; at least one organosilane (V) as a crosslinker; at least one catalyst (K) for the crosslinking of polydiorganosiloxanes; wherein all organosilanes (V) preferably have the same hydrolyzable alkoxysilane groups, preferably methoxysilane groups; and catalyst (K) is a tin complex having two mercaptide ligands of formula (V), where ligands (L1) are each independently alkyl mercaptides coordinated via sulfur, especially C6 to C16 alkyl mercaptides, where ligands (L1) optionally have methyldialkoxysilane groups, preferably methyldimethoxysilane groups, and ligands (L2) are each independently alkyl ligands, especially C6 to C14 alkyl ligands; and component (B) contains less than 5% by weight of carbon black based on component (B).

This invention relates to the field of petrochemical catalytic desulfurization technology, specifically disclosing a high-efficiency desulfurizing agent, its preparation method, and its application in the desulfurization of heavy naphtha. The desulfurizing agent provided by this invention has a "two-level" metal active center. The first level is a cobalt center in biochar, and the second level is a nickel-copper bimetallic center introduced through impregnation on the surface of a composite carrier. The desulfurizing agent provided by this invention has excellent desulfurization effect. Under conditions of 140°C and no hydrogen, it can simultaneously remove inorganic sulfur such as hydrogen sulfide and organic sulfur such as thiols, thioethers, and thiophenes from heavy naphtha obtained by hydrocracking of heavy diesel oil, wax oil, or mixed diesel and wax oil, reducing the total sulfur content from 25-40 μg·g. ‑1 Reduced to 0.2 μg·g ‑1 The following methods can effectively protect bimetallic (multimetallic) reforming catalysts from sulfur poisoning, and the preparation process is green and controllable, making it suitable for large-scale industrial applications.

This invention discloses a method for synthesizing disulfide ether compounds using visible light-emitting two-dimensional olefin nanomaterials in synergistic catalysis. The method involves mixing a thiol-containing compound with a suitable solvent, and then, under mild light conditions in the presence of a catalytic amount of two-dimensional olefin nanomaterials, achieving efficient disulfide bond construction to obtain a series of disulfide ether compounds. This invention enables the efficient synthesis of disulfide ether compounds. The catalyst used is simple to synthesize, requires low dosage, and is inexpensive. It achieves efficient conversion under mild light conditions, reducing reaction costs and simplifying post-processing steps. The synthesis reaction in this invention can be carried out at room temperature and pressure without any additional additives, exhibiting mild conditions, rapid reaction, and high yield.

The application discloses a high-brightness quantum dot fluorescent microsphere and a preparation method thereof based on an alkali catalysis strategy, and comprises the following steps: (1) preparing thiol-modified dendritic mesoporous silica microspheres; (2) assembling the thiol-modified dendritic mesoporous silica microspheres and quantum dots to obtain a dendritic silica / quantum dot assembly; (3) adding 3-mercaptopropyl triethoxysilane to the dendritic silica / quantum dot assembly, and performing organic silane modification on the dendritic silica / quantum dot assembly in a non-polar organic solvent by taking an organic alkali as an alkali catalyst; and (4) growing a silica shell layer on the surface of the organic silane-modified dendritic silica / quantum dot assembly by a method to obtain the high-brightness quantum dot fluorescent microsphere. The preparation method avoids fluorescence quenching of oil-phase quantum dots in the process of coating silica, and completely retains excellent optical properties of the oil-phase quantum dots.

The application discloses a method for electrochemically synthesizing oxothiazolazine alkane compounds, which utilizes an electrochemical sulfur and oxygen oxidation method for olefins by using olefin radical cations and diprotic nucleophiles, can synthesize N / S heterocyclic compounds in a single reaction container, utilizes easily obtained thiols and styrene azide, does not need external oxidants or redox catalysts, can synthesize N / S heterocyclic compounds in a single reaction container, and can widen the way of obtaining complex molecular structures for pharmaceutical chemistry and material science.

The present invention relates to an optical material having a refractive index higher than or equal to 1.50, obtained by polymerization of a polymerizable composition comprising at least one polymerizable compound having at least two thiol-SH groups, and at least one alkynylene-C = C-group attached on each side to a carbon atom.

This invention discloses a thermal insulation and soundproof building decorative panel, characterized in that it is made from the following raw materials in parts by weight: 30-40 parts of N-(4-cyano-3-trifluoromethylphenyl)methacrylamide / N-tris(hydroxymethyl)methacrylamide / 5-vinylbicyclo[2.2.1]hept-2-ene copolymer, 8-12 parts of hollow SiO2 nanofibers, 3-5 parts of foamed alumina, 5-8 parts of terminal thiol hyperbranched polysulfide, 20-25 parts of inorganic filler, 1-3 parts of coupling agent, 0.8-1.2 parts of peroxide initiator, and 0.3-0.5 parts of foaming agent. This invention also discloses a method for preparing the aforementioned thermal insulation and soundproof building decorative panel. The thermal insulation and soundproof building decorative panel disclosed in this invention has significant thermal insulation effect, excellent comprehensive performance and performance stability, good fire resistance, and low preparation cost.

The present disclosure provides methods for preparing α-hydroxy esters by adding a vinyl Grignard reagent to an oxalate ester and thiolating the resulting double bond. Also provided are α-hydroxy esters and synthetic intermediates prepared according to the methods disclosed herein, as well as compositions containing the α-hydroxy esters.

This application provides a perfluoro-4-butoxy-1-butylsulfonyl fluoride, its preparation method, and its application, relating to the field of chemical synthesis technology. The preparation method of the perfluoro-4-butoxy-1-butylsulfonyl fluoride according to this application includes the following steps: adding butoxybutylsulfonyl fluoride and functional additives to an electrolytic cell containing anhydrous hydrogen fluoride for an electrolytic reaction. The functional additives include alkali metal fluorides, thiols, and perfluorobutylsulfonyl fluoride, wherein the carbon chain length of the thiols is C2~C6. The preparation method of perfluoro-4-butoxy-1-butylsulfonyl fluoride can improve the yield of the target product.

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.

A method for producing a thiol compound including a light emission process in which light is emitted to a colored thiol compound or a composition containing the thiol compound. In the light emission process, it is preferable to emit light including light with a wavelength of 250 nm to 600 nm to the composition.

This application belongs to the field of biomedical technology and discloses an aromatic acetylenyl derivative, a method for coupling it with a thiol, and its application. The aromatic acetylenyl derivative has the following formula (1), where Ar is aryl or heteroaryl; X is -NH-; Y is -(C2H4-O)m-(CH2)s-(COO)h-A; A is selected from one of halogen, C1-C6 alkyl, trifluoromethyl, hydroxyl, methoxy, trifluoromethoxy, acetoxy, cyano, nitro, amino, methylamino, dimethylamino, sulfonamide, methanesulfonyl, methanesulfonamide, carboxyl, and ester, preferably hydroxyl, C1-C6 alkyl or amino; m, s, and h are integers from 0 to 20.

A method for preparing N-phenyl-N-trichloromethylthio phenyl sulfonamide by one-pot method, organic solvent, aniline and catalyst are added to phenylsulfonyl chloride, then slow addition of acid binding agent, incubation for 1-4 h to obtain a reaction solution containing intermediate N-phenyl phenyl sulfonamide; the system is cooled to 0-20℃, slow addition of per-chloromethylthio alcohol, after the end of feeding, continue to react for 1-4 h; then add water to separate the phases, add appropriate amount of water in the organic phase to distill the organic solvent, filter to obtain N-phenyl-N-trichloromethylthio phenyl sulfonamide. The method uses organic solvent as solvent, adopts two-step reaction one-pot method, the process is simple, improves the reaction conversion rate, effectively reduces the generation of by-products, the yield of the product is high, and the quality is good. The used organic solvent and acid binding agent can be recycled and used, which reduces the production cost and greatly reduces the three wastes, and is suitable for industrial production.

The invention provides a soil conditioner for heavy metal passivation and a preparation method thereof, and belongs to the field of soil conditioners. The soil conditioner is prepared from the following raw materials in parts by weight: 50-70 parts of modified mushroom residues subjected to pre-fermentation treatment, 3-8 parts of sodium alginate, 15-25 parts of modified zeolite, 5-10 parts of humic acid, 5-10 parts of calcium carbonate powder, 1-2 parts of a compound functional microbial agent and 0.5-3 parts of a sulfydryl-amino bifunctional group modified silane coupling agent derivative. Through the unique raw material composition design, a multi-stage synergistic effect system is systematically constructed, so that the rapid chelating efficiency, the deep fixing capability and the long-term storage stability of the soil conditioner on heavy metals are remarkably improved.

The invention belongs to the technical field of lubricants, and discloses a lubricant containing Guerbet alcohol derivatives and a preparation method and application thereof. The lubricant is prepared from the following components in parts by weight: 2 to 6 parts of Guerbet alcohol derivative, 0.2 to 1 part of sulfurized isobutylene, 0.05 to 0.3 part of tungsten disulfide nanosheet, 0.01 to 0.1 part of surface modified fullerene, 0.5 to 1.5 parts of triisopropanolamine borate, 80 to 95 parts of 2-octyl-dodecyl cyclopentane, 0.3 to 0.8 part of antioxidant and 0.1 to 0.5 part of antirust agent. The Guerbet alcohol derivative is an ester derivative of Guerbet alcohol; the surface modified fullerene is obtained by modifying fullerene by using dodecyl mercaptan and azodiisobutyronitrile. When ester synthesized from isostearyl alcohol is used as an ester derivative of Guerbet alcohol, the lubricant still has good lubricating performance. Furthermore, the high-temperature-resistant and high-pressure-resistant oxidation performance is good.

The present disclosure provides processes for preparing alpha-hydroxy esters by adding a vinyl Grignard reagent to an oxalate and thiolizing the resulting double bond. Also provided are alpha-hydroxy esters and synthetic intermediates prepared according to the processes disclosed herein, as well as compositions comprising the alpha-hydroxy esters.

This invention relates to an organic electrochemical transistor for detecting protein-like substances, its preparation method, and its application, belonging to the field of protein detection technology. The organic electrochemical transistor for detecting protein-like substances of this invention includes a substrate, a source electrode, a drain electrode, a channel layer, an electrolyte, and a functionalized porous carbon-based gate. The source electrode and drain electrode are disposed parallel to each other on the substrate, forming a channel. The functionalized porous carbon-based gate includes a porous carbon-based gate, a self-assembled layer, and a protein-specific recognition layer stacked sequentially. The self-assembled layer is formed on the surface of the porous carbon-based substrate through the self-assembly of a carboxyl-containing thiol compound. The protein-specific recognition layer is covalently bonded to the surface of the self-assembled layer via amide bonds. The functionalized porous carbon-based gate achieves specific recognition of target protein-like substances through the protein-specific recognition layer. The organic electrochemical transistor of this invention exhibits good sensing stability, consistency, and high sensitivity.

The present disclosure relates to an etching liquid comprising: an alkaline compound (A); and at least one compound (B) selected from the group consisting of a thiol compound (B1) and a nonionic surfactant (B2) represented by Formula (1) below, wherein ER110 / ER100≥0.5, where ER110 is an etching rate of a (110) plane of a silicon crystal, and ER100 is an etching rate of a (100) plane of the silicon crystal, R1XO—(CmH2mO)n—R2 (1), where R1 is an alkyl group having 7 or more carbons, R2 is a hydrogen atom or an alkyl group, X is a single bond or a phenylene group, m is an integer of 1 to 6, and n is from 4 to 25.

This invention relates to the field of polypeptide drug synthesis technology and discloses a method for synthesizing etakatide. The synthesis method of this invention simplifies the reaction process by combining the deprotection step of D-Cys with thiol activation, making the operation simple and inhibiting the formation of dimer impurities. It also avoids sulfonation impurities caused by disulfide bond construction in the liquid phase, thereby improving the yield and reducing production costs. This method can be applied to the production of etakatide.

This invention belongs to the field of metal rust prevention technology, specifically relating to an environmentally friendly water-based rust-preventive composition, its preparation method, and its application. The composition comprises, by weight, 3-8 parts of a first triazine compound, 1-5 parts of a second triazine compound, 10-20 parts of 2-amino-2-methyl-1,3-propanediol, 2-5 parts of dipropylene glycol monomethyl ether, and 65-85 parts of water. The first triazine compound is a triazine compound having substituents containing hydrophobic segments and at least two aminocarboxylic acid substituents, and the second triazine compound is a triazine compound having thiol substituents. This invention forms a dual-anchored protective film on the metal surface through the two triazine compounds, exhibiting excellent salt spray resistance, damp heat resistance, and film density. It achieves a salt spray test duration of 72 hours, a damp heat test duration of 960 hours, and an adhesion rating of 0. Furthermore, it is free of nitrites, phosphates, and heavy metals. The preparation method is simple, suitable for industrial production, and can be widely applied to metal rust prevention in machinery manufacturing, automotive parts, and other fields.

The application discloses a thiazole-containing flavonol derivative and a preparation method and application thereof, and belongs to the technical field of pesticide synthesis. A thiazole-containing flavonol derivative is generated by substitution reaction of 3-(bromoalkyloxy)-7-substituent-2-(4-substituent phenyl)-4H-chromone-4-ketone and 5-substituent-2-thiol-1,3,4-thiadiazole, and a structural formula is shown as formula Y: wherein n is 3 or 4; R1 is hydrogen or an amino group; R2 is hydrogen, an alkyl group or an alkoxy group; and R3 is hydrogen, a halogen, an alkyl group or an alkoxy group. The thiazole-containing flavonol derivative has good bacteriostatic activity and can be applied to the preparation of bacteriostatic medicaments.