16 results about "Dodecylmercaptan" patented technology

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).

Discloses an aqueous antimicrobial coating composition comprising: (A) a polymer obtained by a multistage polymerisation and composed of: 75% to 95% of a first-stage polymer and from 5% to 25% of a second-stage polymer; wherein the first-stage polymer comprises: monoethylenically unsaturated functional monomers carrying at least one functional group selected from a carboxyl, carboxylic anhydride, sulfonic acid, amide, sulfonate, phosphoric acid, phosphonate, phosphate, or hydroxyl group (e.g. acrylic acid, acrylamide); <1.0% of a monomers bearing imidazole, benzotriazole, or benzimidazole; and monoethylenically unsaturated nonionic monomers (e.g. alkyl acrylate); wherein the second-stage polymer has MW=8000 to 30000 g / mol and comprises: residues of C6-C24 alkyl thiol (e.g. dodecyl mercaptan); monomers bearing imidazole, benzotriazole, or benzimidazole (e.g. vinyl imidazole); and monomers of alkyl acrylate; wherein the monomers bearing imidazole, benzotriazole, or benzimidazole in a multistage polymer are present at a total concentration of 0.5% to 8%; and (B) 1 to 10000 ppm of a silver, wherein the mol ratio of monomers bearing imidazole, benzotriazole, or benzimidazole to silver is greater than 4; and (C) <500 ppm of coagulum (coagulates having diameter>44 micrometers); and a method of preparing such aqueous antimicrobial composition and a coating composition comprising such aqueous antimicrobial composition and a pigment.

The invention discloses a foaming agent as well as a preparation method and application thereof, and belongs to the technical field of mineral separation. The foaming agent comprises the following raw materials in percentage by mass: 80%-96% of No.2 oil and 1%-22% of lauryl mercaptan. The foaming agent is prepared by the following steps: compounding and modifying No.2 oil, and uniformly mixing the No.2 oil with lauryl mercaptan according to a certain mass ratio, so as to obtain modified No.2 oil; the modified foaming agent not only has the characteristics of good foam brittleness and good flowability, but also can strengthen a collecting agent for sulphide ore, and can achieve the purpose of improving the concentrate grade and the recovery rate at the same time.

The application relates to the technical field of ABS packaging bottles, and more specifically to an ultraviolet-resistant ABS material, a preparation method thereof and a packaging bottle. An ultraviolet-resistant ABS material comprises the following raw materials in parts by weight: 50-80 parts of styrene, 14-26 parts of acrylonitrile, 12-18 parts of a benzotriazole ultraviolet-resistant absorber, 8-14 parts of butadiene, 0.1-0.9 parts of benzoyl peroxide, 0.1-0.5 parts of tertiary dodecyl mercaptan and 40-60 parts of toluene; the benzotriazole ultraviolet-resistant absorber comprises the following raw materials in mole: 1-3 parts of hydroxyethyl methacrylate, 2-4 parts of toluene-3,5-diisocyanate and 1-3 parts of a polyhydroxy-containing ultraviolet-resistant absorber. The ultraviolet-resistant ABS material has excellent ultraviolet-resistant performance and migration resistance.

The application provides a catalyst for synthesizing tertiary dodecyl mercaptan from triisobutene, a preparation method and use thereof. The method comprises the following steps: preparing a silicon source mixed solution A, preparing a gallium source mixed solution B, and preparing a structure directing agent mixed solution C; adding A into C, stirring, and then adding B to obtain a sol-like substance; adding a cerium source and / or a lanthanum source and an alkyl polyamine solution, stirring to obtain a mixed solution D, and continuously stirring to obtain a powder after drying; and calcining the powder to obtain a unit point rare earth regulated Si-Ga nanomaterial. The catalyst has excellent activity and super-long stability (more than 800 h) in a reaction for synthesizing tertiary dodecyl mercaptan from triisobutene as a raw material, and can be used for industrial production.

The application discloses an environment-friendly copper-gallium-chalcogenide zinc sulfide core-shell quantum dot as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a gallium source, a copper source, oleylamine and 1-dodecyl mercaptan, heating, degassing in a nitrogen environment, adding a sulfur precursor solution, reacting, obtaining a quantum dot solution, heating the quantum dot solution, adding a zinc acetate precursor solution dropwise and stirring to react, continuously heating, adding a zinc stearate precursor solution dropwise and stirring to react, water quenching after the reaction, purifying, and obtaining a copper-gallium-chalcogenide zinc sulfide core-shell quantum dot. The copper-gallium-chalcogenide zinc sulfide core-shell quantum dot material prepared by the method of the application does not add toxic heavy metal materials, is harmless to human bodies and the environment, and has the advantage of high light condensation efficiency, and can effectively solve the problems of existing quantum dot materials.

The invention provides a high-adsorption and high-conductivity gold coating for a PI substrate and a preparation method of the high-adsorption and high-conductivity gold coating, and belongs to the technical field of electronic functional materials. The preparation method comprises the following steps: synthesizing tert-dodecylmercaptan gold, and mixing the tert-dodecylmercaptan gold with a first organic solvent to obtain an organic gold coating; and the pretreated PI substrate is coated with the organic gold coating and annealed, and the gold coating is obtained. According to the method, mercaptan molecules are effectively used as a bifunctional bridge to cooperatively create an organic-inorganic hybrid interface with high bonding strength and good stability, the inherent defect of poor adhesion of a pure gold coating is overcome, the sheet resistance of the prepared gold coating is lower than 0.3 omega / sq, the adhesion reaches the 5B level, the resistance is not obviously changed in an environmental adaptability test, the adhesion is still the 5B level, and the prepared gold coating has a good application prospect. And high conductivity, strong substrate adhesion and excellent environmental stability of the gold coating are realized.

The invention discloses an electrode material for a hydrogen production electrolytic cell and a preparation method thereof, and relates to the technical field of hydrogen production, and the preparation method comprises the following steps: uniformly mixing and stirring nickel salt, ferroferric oxide, ethylene glycol and lauryl mercaptan; adding ammonia water, uniformly mixing, carrying out hydrothermal reaction, washing and drying to obtain nickel / ferroferric oxide; the preparation method comprises the following steps: adding nickel / ferroferric oxide and a binder into a solvent, stirring for 4-6 hours, and carrying out spray drying to obtain modified nickel / ferroferric oxide; and carrying out heat treatment on the modified nickel / ferroferric oxide in an inert atmosphere to obtain the electrode material. The prepared electrode material has high activity, and the hydrogen production efficiency is effectively improved.

This invention discloses a method for preparing an ultrathin zinc indium sulfide / zinc selenide heterojunction photocatalyst: Step 1, a certain amount of ZnCl2, InCl3·4H2O and oleylamine are mixed and subjected to a first deoxygenation treatment. A mixed solution of 1-dodecanethiol and tert-dodecylmercaptan is rapidly injected under nitrogen conditions and reacted at a certain temperature for a certain time to obtain ultrathin zinc indium sulfide nanosheets. After centrifugation and washing, the nanosheets are redissolved in a certain amount of n-hexane. Step 2, zincacetate, oleic acid and 1-octadecene are mixed and subjected to a second deoxygenation treatment. The mixture is then heated to a certain temperature under nitrogen conditions, reacted for a certain time, and cooled. A certain amount of the solution obtained in step S1 is rapidly injected and subjected to a third deoxygenation treatment. The mixture is then heated under nitrogen conditions, and a certain amount of a mixed solution of Se and TOP is slowly injected at a certain rate. The mixture is then kept at a certain temperature and reacted for a certain time. After the injection process is completed, the reaction is allowed to continue. Finally, the solution is cooled to room temperature and centrifuged to obtain ZIS / ZnSeHNSs.

The application discloses a modified polystyrene material, a preparation method and application of a light diffusion plate, relates to the technical field of light diffusion plate materials, and belongs to the patent publication C08L53 / 02. The preparation method of the modified polystyrene material comprises the following steps: mixing styrene monomers, alpha-methyl styrene monomers, a vinyl-functionalized cage silsesquioxane, benzoyl peroxide and dodecyl mercaptan, performing a polymerization reaction under nitrogen protection to obtain a polystyrene prepolymer; dispersing zirconium phosphate nanosheets in anhydrous ethanol, adding gamma-(methacryloyloxy) propyl trimethoxysilane and glacial acetic acid, and performing a reflux reaction to obtain zirconium phosphate nanosheets modified by a coupling agent; crushing the polystyrene prepolymer, pre-mixing the polystyrene prepolymer with the zirconium phosphate nanosheets modified by the coupling agent, an antioxidant and a lubricant at a high speed, drying the mixture, feeding the mixture into a double-screw extruder for melt blending, extruding, cooling, cutting and drying, and thus obtaining the modified polystyrene material. The prepared modified polystyrene material has excellent heat resistance.

The invention belongs to the field of RAFT reagent synthesis, and particularly relates to a preparation method of a reversible addition fragmentation chain transfer reagent. Comprising the following steps: by taking dodecyl mercaptan as a starting raw material, generating thiolate under the action of alkali; and reacting the obtained thiolate with carbon disulfide (CS2) to generate trithiocarbonate. And reacting the obtained trithiocarbonate with trichloromethane and acetone under the catalysis of alkali, and finally acidifying to obtain 2-[dodecyl sulfenyl (thiocarbonyl) sulfenyl]-2-methyl propionic acid, namely the RAFT reagent. Tetrabutylammonium bromide is specifically selected as a phase transfer catalyst, and the catalyst system provided by the invention can realize higher product yield.

The invention discloses a production method of seed glue for styrene-butadiene latex, and relates to the technical field of preparation of seed glue, and the production method comprises the following steps: preparing a monomer mixture, a premix mixture, an emulsifier mixture and an initiator mixture according to a formula proportion; transferring the prepared backing material into a reaction kettle, introducing nitrogen into the reaction kettle for 5 minutes to replace air, keeping an emptying valve to be opened, and starting a stirrer; opening a steam valve at the bottom of the reaction kettle and a jacket steam valve, synchronously heating until the kettle temperature and the jacket water temperature reach 84 + / -1 DEG C, and simultaneously finishing the preparation of an ammonium persulfate solution; dropwise adding styrene, manually controlling dropwise adding of dodecyl mercaptan, and continuously polymerizing for 3 hours; and after the monomer is dropwise added, preserving heat, cooling, replenishing the defoaming agent, sampling, detecting to be qualified, and transferring to obtain the seed glue for styrene-butadiene. By optimizing the formula proportion of the styrene, the surfactant, the sodium bicarbonate, the ammonium persulfate and the lauryl mercaptan required by synthesis and related process conditions, the energy consumption is reduced, the cost is reduced, and the effect is improved.

The invention provides a high-molecular organic composite suspending agent and a preparation method thereof, and belongs to the technical field of high-molecular materials, and the suspending agent comprises a high-molecular copolymer, an S-PEGMA copolymer, a PNIPAM-Q-CNC composite microsphere suspension, a zirconium complex-silane coupling agent composite system and the like. The high-molecular copolymer is prepared by reacting components such as a PS-Br initiator, 2-acrylamide-2-methylpropanesulfonic acid and the like with cuprous bromide, pentamethyldiethylenetriamine and lauryl mercaptan. The S-PEGMA copolymer is prepared by reacting dipentaerythritol, methacrylic acid, p-toluenesulfonic acid, hydroquinone and the like and then reacting with polyethylene glycol methacrylate and azodiisobutyronitrile. The preparation method comprises the following steps: hydrolyzing microcrystalline cellulose, modifying with glycidyl trimethyl ammonium chloride to prepare Q-CNC, and reacting with N-isopropylacrylamide, N, N '-methylene bisacrylamide and ammonium persulfate to prepare a PNIPAM-Q-CNC composite microsphere suspension.

The application belongs to the field of materials, and discloses a pH-responsive intelligent oil-water separation copper mesh and a preparation method thereof. The preparation method is as follows: the copper mesh is sequentially ultrasonically cleaned in ethanol and water and dried to remove oil stains and make the surface clean. The dried copper mesh is soaked in a silver nitrate solution for 1h-4h. After being taken out, the copper mesh is soaked in a dodecyl mercaptan and mercapto-undecanoic acid ethanol solution for 24h-48h, then the surface solution is washed clean with ethanol, and finally dried to obtain a pH-responsive intelligent oil-water separation copper mesh. The pH-responsive intelligent oil-water separation copper mesh can realize quick switching between hydrophilicity and hydrophobicity on the surface, selectively recover oil and water, and has strong reusability.

The invention provides application of sulfur and alkyl mercaptan as a composite regulator in preparation of chloroprene rubber from chloroprene monomers. The alkyl mercaptan comprises n-dodecyl mercaptan and / or tert-dodecyl mercaptan; the mass ratio of the sulfur to the alkyl mercaptan is (3-5): 1. The invention also provides a sulfur-mercaptan synergistic regulation mixed regulation type chloroprene rubber synthesis process without chain scission. According to the designed composite regulator system, improvement of processability by sulfur is reserved, branching is inhibited through thiol, PDI is controlled, a chain scission process is not needed, the Mooney viscosity fluctuation of the product prepared from the mixed regulation type CR is smaller than or equal to 5ML (1 + 4) 100 DEG C according to the proportion, and sudden reduction of viscosity is effectively avoided. According to the synthesis method provided by the invention, Mooney viscosity controllability, molecular weight uniformity and stability are considered, and the mixed regulating chloroprene rubber with narrow molecular weight distribution, controllable chain scission and long storage period is obtained.

The application discloses a method for improving the selectivity of electrocatalytic reduction of acetylene to 1,3-butadiene by using copper hydroxide hydrophobic nano array, and the copper net is soaked in a mixed solution of NaOH and (NH4)2S2O8 to obtain Cu(OH)2 self-supporting nano array, and then soaked in an ethanol solution of 1-dodecyl mercaptan to obtain 1-dodecyl mercaptan modified Cu(OH)2 hydrophobic self-supporting nano array. A dry hydrophobic self-supporting nano array is tightly pressed with carbon paper by using a hot press to serve as a working electrode, the cathode chamber and the anode chamber are separated by an anion exchange membrane, the electrolyte is composed of KOH solution, and a peristaltic pump is used to make the liquid phase continuously circulate. The application realizes the high selectivity conversion of acetylene to 1,3-butadiene by using a three-electrode system for electrocatalytic reduction of acetylene to 1,3-butadiene.