38 results about "Benzyl mercaptan" patented technology

The invention relates to an antibacterial and environment-friendly deodorant of microorganism strains and a preparation method thereof. The traditional method for removing odor generally uses essence to cover up the odor or pumping odor physically or uses ozone to oxidize and degrade the odor or uses a chemical method. The methods also can alleviate the odor to a certain extent, but finally the problem can not be solved really and fundamentally and the essence and chemical deodorization also have secondary pollution. The microbial deodorization technology utilizes the effects of high-efficient absorption, absorption and metabolism of particular microorganism strains which can convert or degrade odorant, to purify the odorous gases of amyl mercaptan, benzene methanethiol, methyl sulfide, ethanethiol, hydrogen sulfide, sulfur dioxide, p-benzyl mercaptan, ammonia, dimethylamine, trimethylamine and carbon disulfide and the like which are emitted from human life areas, domestic sewage and domestic garbage and the like and to convert the odorous components of amyl mercaptan, benzene methanethiol, methyl sulfide, ethanethiol, hydrogen sulfide, sulfur dioxide, p-benzyl mercaptan, ammonia, dimethylamine, trimethylamine and carbon disulfide and the like into matters without harm and odor, thus achieving the purpose of thoroughly improving air quality and protecting health of people. The preparation method utilizes a fermentation method of microorganism strains to prepare deodorant products.

The invention discloses a preparation method of a hyperbranched multifunctional dispersant, and belongs to the field of fine chemical engineering. The preparation method comprises the following steps: by taking p-vinyl benzyl mercaptan as a branching monomer and chain transfer agent, carrying out free radical polymerization reaction on polymerizable double-bond hydrophobic monomers and a hydrophilic monomer maleic anhydride in a certain proportion in a solvent under initiation of an initiator; and then, esterifying and modifying polymerization products under action of an esterification catalyst to obtain the hyperbranched multifunctional dispersant. The hyperbranched multifunctional dispersant is suitable for dispersing a plurality of inorganic and organic pigments; and moreover, the prepared pigment is low in paste viscosity, and good in storage stability and freeze-thaw stability. The hyperbranched multifunctional dispersant can be applied to the industries such as paint, textiles and chemical engineering.

A derivative of dibenzo-tetrathiafulvalene-tetrahydroxy-succinimide is provided, which has the structure shown by the right formula, in which R represents an alkyl. The preparation method includes the following procedures that: A) a mixture of dichlorophthalic anhydride and amine with the molecular ratio of 1: 1.5-3 undergoes circumfluence in propionic acid under 140 DEG C to 160 DEG C for 2-4 hours, B) the products obtained in procedure A is mixed with benzyl mercaptan with the molecular ratio of 1:2-3 and then undergoes calefaction in dimethylacetamide under the condition with excessive dosage of K2CO3 under 60 DEG C to 80 DEG C and, C) the product obtained in procedure B is kept in dry toluene with excessive dosage of AlCl3 to undergo debenzylation, and then reacts with carbonyldiimidazole under 70 DEG C to 90 DEG C for 2-5 hours, wherein the molecular ratio between 4,5-[(diphenylmethyl)thio substituted]- phthalimide and the carbonyldiimidazole is 1:1-3 and, D) the product obtained in procedure C undergoes circumfluence in a mixture of toluene/triethyl phosphate, the molecular ratio of which is 2-3/1 to carry out the auto-coupling reaction for 2-5 hours, the product of which is cooled down and filtrated to obtain the target product.

The invention relates to a preparation method of mesosulfuron-methyl. The method comprises the following steps: taking 4-cyano-2-nitrobenzoate as a starting raw material; firstly performing a nucleophilic substitution reaction with benzyl mercaptan; then, performing reduction hydrogenation by using raney nickel, performing methylsulfonyl acidylation by using methylsulfonyl chloride; then, performing chlorination by using chlorine gas and performing ammoniation by using ammonia gas to obtain a key intermediate, namely 2-methoxycarbonyl-5-methanesulfonyl ammonia toluenesulfonamide; and finally,performing condensation to obtain a target product, namely the mesosulfuron-methyl. A route of the method is mild in reaction process condition; the operation is easy; the method is suitable for industrial mass production; less environmental pollution is caused; and the method is a relatively good novel method for synthesizing the mesosulfuron-methyl.

The invention discloses a method for producing thionocarbamate and dibenzyl disulfide. The method comprises the following steps: carrying out an esterification reaction on alkyl xanthate and benzyl halide to obtain alkyl benzyl xanthate; carrying out an aminolysis reaction on the alkyl benzyl xanthate and fatty amine to obtain a thionocarbamate and benzyl mercaptan mixture; and carrying out an oxidation reaction on the thionocarbamate and benzyl mercaptan mixture and hydrogen peroxide, and carrying out liquid-solid separation to obtain a solid which is the dibenzyl disulfide product and a liquid, and allowing the liquid to stand for oil and water layering in order to obtain an oil phase which is the thionocarbamate product. The dibenzyl disulfide product and thionocarbamate product obtained through the method have high yield and high purity, and the method has the advantages of easiness in separation of the products in the preparation process, environmental protection, high atom economy property, low production cost, and easiness in realization of industrial production.

A preparation method of amphiphilic photoelectric active branched macromolecules belongs to the field of macromolecular polymerization. The preparation method comprises the following steps: (1) under normal pressure condition, 7-(4-vinyl benzyloxy)-4-methylcoumarin, N-(4-vinyl benzyl)-9H-carbazole, 4-vinyl benzyl mercaptan, maleic anhydride, a radical initiator and a solvent are placed in a 250ml four-neck flask; (2) nitrogen is introduced into the container in the step (1) for 30 min, sealed stirring is carried out to fully dissolve the nitrogen, solution temperature rises to 65-70 DEG C and a thermostatic reaction is carried out for 24h; and (3) after the reaction, the solution obtained from the step (2) is precipitated in a precipitating agent and undergoes suction filtration, and a solid obtained after filtration undergoes dissolution, precipitation and suction filtration repeatedly for 3 times, and the solid obtained finally undergoes vacuum drying to constant weight. According to the invention, polymerization conditions are mild, and the preparation method is simple to operate. The polymer obtained can be used to remarkably raise dispersion stability of carbon nano-tube in an aqueous solvent.

The present invention discloses a medical titanium metal material and a preparation method thereof, wherein the medical titanium metal material has functions of bacterial adhesion resistance and osteoblast growth promotion, and comprises a titanium metal nanotube substrate, a first adhesion layer and a second adhesion layer, wherein the first adhesion layer is a 3-(trifluoromethyl)benzyl mercaptan adhesion layer, the second adhesion layer is a polyethylene glycol compound adhesion layer, the two adhesion layers are introduced to improve the adhesion of the polyethylene glycol compound on the titanium metal surface, and the polyethylene glycol compound is adopted to improve the bacterial adhesion resistance of the titanium metal, such that the adhesion breeding of the bacteria on the titanium metal surface is avoided. According to the present invention, the molecular imprinting method is adopted during the introduction process of the polyethylene glycol compound adhesion layer, such that the titanium metal material has the function of effective identification on the osteoblast molecules, and the osteoblasts can easily perform fixed growth on the material surface.

The invention discloses photoresist pigment paste and a preparation method thereof, and relates to the technical field of liquid crystal display materials. The preparation method comprises the following steps: mixing a graphene oxide aqueous solution with N, N-dimethylformamide, carrying out spray drying on the obtained mixture and hot inert gas, carrying out thermal reduction to obtain modified graphene, mixing molten paraffin with an initiator, adding styrene, carrying out a reaction to obtain pretreated paraffin, mixing the pretreated paraffin and a toluene solution containing maleic anhydride, vinyl benzyl mercaptan and an initiator for a reaction, preparing modified paraffin, stirring and mixing the modified paraffin, modified graphene and pigment under the low-temperature condition, and performing stirring and mixing under the high-temperature condition to obtain pretreated pigment; finally, mixing propylene glycol methyl ether acetate with n-butyl acetate, adding acrylic resin, the pretreated pigment and a wetting dispersant, and performing stirring and mixing to obtain the photoresist pigment paste. The photoresist pigment color paste prepared by the invention has excellent stability and good pigment dispersity.

The invention relates to a high-selectivity synthesis method of alpha,beta-unsaturated iodoketenes and olefine aldehydes. Simple and accessible allenic sulfoxide, iodine and benzyl mercaptan used as raw materials are synthesized into various alpha,beta-unsaturated iodoketenes and olefine aldehydes at high selectivity. The allenic sulfoxide can react with the iodine and benzyl mercaptan in a solvent in which the chloroform/ethanol ratio is 50/1 to generate iodoketenes and olefine aldehydes at high selectivity; and C-I bonds in the iodoketenes and olefine aldehydes can be subjected to coupling reaction to efficiently synthesize the alpha,beta-unsaturated olefine aldehydes. The invention has the advantages of simple and accessible raw materials, mild conditions, high operability, favorable substrate universality, and high selectivity for cis or trans reaction, is convenient for preparation, can be used for synthesizing various substituted alpha,beta-unsaturated iodoketenes and olefine aldehydes; and the product is easy to separate and purify.

The invention provides an alkylthiol functionalized aromatic carboxylic acid compound as well as a preparation method and application thereof. The compound has the structure as shown in formula I in the description. In the compound with the structure as shown in formula I, a mercapto group is separated from a benzene ring by a methylene group, the mercapto group is released, so that the mercapto group can better exert the functionalization effect and is easy to modify, and reactivity is higher; heavy metal ions can be adsorbed; flexibility of the side-chain benzyl mercaptan can be increased. Experimental results show that the compound can adsorb Hg<2+>.

The invention discloses a method for synthesizing 6-(benzyl sulfonium)-6-ethylene oxo-hexanoate on line through lipase catalysis. The method comprises the following steps: by taking dimethyl sulfoxideas a reaction solvent, taking benzyl mercaptan and divinyl adipate as raw materials according to a mole ratio of 1: (0.5 to 6), and taking lipase Lipozyme TL IM as a catalyst, placing the raw materials and the reaction solvent into an injector, uniformly filling a reaction channel of a microfluidic channel reactor with the lipase Lipozyme TL IM, and continuously feeding the raw materials and thereaction solvent into the channel reactor for acylation reaction under pushing of an injection pump, wherein the inner diameter of the reaction channel of the microfluidic channel reactor is 0.8 to 2.4 mm, and the reaction channel is 0.5 to 1.0 m in length; controlling the acylation reaction temperature at 20 to 60 DEG C and the acylation reaction time for 20 to 40 min, collecting reaction liquidon line through a product collector, and treating the reaction liquid in a conventional way to obtain the 6-(benzyl sulfonium)-6-ethylene oxo-hexanoate. The method has the advantages of short reactiontime, high selectivity and high yield.

The invention discloses a method for preparing a carbon nano-tube supported palladium nano-composite material by utilizing phase transfer and self-assembly technology. The method of the invention comprises the following steps: dissolving dodecyl sulfide and palladium acetate in absolute ethyl alcohol, and heating and stirring to obtain a Pd nano-particle ethanol solution; adding the prepared Pd nano-particle ethanol solution into an organic solvent containing benzyl mercaptan, extracting the ethanol through distilled water, and transferring Pd nano-particles into the organic solvent through phase transfer; and adding the organic solvent containing the Pd nano-particles into CNTs in the corresponding suspension of the organic solvent, and carrying out conventional treatment to obtain a Pd/CNTs nano-composite material. The analysis result shows that the Pd nano-particles of the material synthesized by the method are uniformly distributed on the surfaces of the CNTs.

The invention discloses a method for catalyzing online synthesis of S-benzyl thiol laurate via lipase. The method comprises the following steps: with dimethyl sulfoxide as a reaction solvent, benzyl mercaptan and vinyl laurate at the molar rate of 1: (0.5-6) as raw materials and the lipase LipozymeTL IM as a catalyst, adding the raw materials and the reaction solvent to an injector, uniformly filling a reaction channel of a micro-fluidic channel reactor with the lipase LipozymeTL IM, continuously supplying the raw materials and the reaction solvent into the reaction channel under the pushing of an injection pumpa and implementing an acylation reaction, wherein the inner diameter of the reaction channel of the micro-fluidic channel reactor is 0.8-2.4mm and the reaction channel is 0.5-1.0m long; and controlling the temperature of the acylation reaction at 20-60 DEG C and the duration of the acylation reaction as 20-40min, collecting a reaction solution online by virtue of a product collector, and conducting conventional treatment on the reaction solution, so that the S-benzyl thiol laurate is obtained. The method provided by the invention has the advantages of being short in reactiontime, high in selectivity and high in yield.

The method comprises the following steps: mixing a catalyst Bi4O5Br2/Fe3O4 with the mass percent of 10-20% and mercaptan in 1-5 mL of water, irradiating for 1-3 hours by adopting a 30W blue light LED under the condition of room temperature in the air, performing extracting by using an ethyl acetate solvent after the reaction is finished, and detecting the conversion rate and selectivity by using a gas chromatography internal standard method, wherein the conversion rate is greater than 90%, and the selectivity is greater than 90%. According to the method, a magnetic recoverable composite catalyst Bi4O5Br2/Fe3O4 is used, water is taken as a solvent, mercaptan coupling oxidation is carried out at room temperature to prepare the disulfide, the catalyst can be recycled through magnetic control after the reaction is finished, and benzyl mercaptan can be converted into the disulfide within 2 hours at room temperature in a water phase.

The invention discloses a chiral silver nanocluster and preparation and application thereof. The molecular formula of the chiral silver nanocluster is Ag40(TBBM)22(CH3COO)10 which is abbreviated as Ag40, wherein TBBM is p-tert-butyl benzyl mercaptan. The Ag40 nanocluster provided by the invention can realize sensitive, rapid and quantitative reaction with chiral carboxylic acid drugs (such as 2-chloropropionic acid, ibuprofen, naproxen, isoleucine and the like) so as to allow the chiral signals of the chiral carboxylic acid drugs to be transmitted to the Ag40 nanocluster, so the content and the chiral e.e. value of the chiral carboxylic acid drugs can be conveniently measured. According to the invention, reaction conditions are mild; operation is simple; and a substrate can be recycled andhas good universality.

The invention discloses a medical stainless steel material and a preparation method thereof. The medical stainless steel material has the functions of bacterial adhesion resistance, sterilization and promotion of osteoblast growth and comprises a medical stainless steel matrix, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is a 3-(trifluoromethyl)benzyl mercaptan adhesive layer; the second adhesive layer is a polyethylene glycol compound adhesive layer; the surface of the second adhesive layer adsorbs silver nanoparticles. The medical stainless steel material disclosed by the invention can improve the adhesive capability of the polyethylene glycol compound on the surface of the stainless steel to prevent falling off; furthermore, the polyethylene glycol compound is utilized to improve the bacterial adhesion resistance of the stainless steel, so as to avoid that the bacteria are adhered and proliferate on the surface of the stainless steel; in addition, the silver nanoparticles are utilized to improve the bactericidal ability of the stainless steel. According to the invention, a molecular imprinting method is utilized during the process that the polyethylene glycol compound adhesive layer is introduced, so as to enable the stainless steel material to achieve a function of effectively identifying the osteoblast molecules and help the osteoblast to be fixed and grow on the surface of the material.

The invention discloses a NiO nanoparticle gas sensor based on Cr doping, a preparation method and application thereof. According to the gas sensor element disclosed by the invention, Cr-doped NiO nano-particles are used as a gas sensitive material, the particle size of the Cr-doped NiO nano-particles is 5 to 10 nm, and in terms of atomic percentage, the doping amount of Cr in the Cr-doped NiO nanoparticles is 0-35%, but not 0, preferably 20-30%, and more preferably 25%. According to the invention, the gas sensor has excellent performance to benzene series at a low temperature, the lowest detection concentration to aniline, trimethylbenzene, methylbenzene and benzyl mercaptan is smaller than 1 ppm, the response value to benzyl mercaptan at 100 ppb reaches 10.8, ppb-level high-sensitivity detection can be achieved, and the sensor has huge application prospects in the fields of environmental monitoring, essence manufacturing, preparation of herbicides and insecticides, synthesis of sulphide ore flotation reagents and the like.

The invention discloses a p-type thermoelectric material and a preparation method thereof. The p-type thermoelectric material is an Ag-based coordination polymer and is obtained by reacting a ligand as shown in a formula I with silver acetate, wherein the ligand is prepared according to a method comprising the following steps: S1, in an inert atmosphere, reacting benzyl mercaptan with sodium hydride to obtain benzyl mercaptan sodium, and reacting the benzyl mercaptan sodium with chloranil; s2, a crude product obtained after the reaction is subjected to a reaction in the presence of manganese dioxide, and 2, 3, 5, 6-tetrabenzyl thio-1, 4-benzoquinone is obtained; s3, under the inert atmosphere, 2, 3, 5, 6-tetrabenzyl thio-1, 4-benzoquinone and boron tribromide are subjected to a reaction in fluorobenzene, and 2, 3, 5, 6-tetrabenzyl thio-1, 4-benzoquinone and boron tribromide are subjected to a reaction; and reacting the obtained product in degassed methanol in an inert atmosphere. The Ag-based coordination polymer has high crystallinity, high conductivity and high Seebeck coefficient, and has important significance on synthesis of p-type thermoelectric materials.