19 results about "Ethanethiol" patented technology

The invention provides a novel silane coupling agent and a preparation method thereof, and belongs to the technical field of silane coupling agents, and the preparation method comprises the following steps: taking chloropropyltriethoxysilane and 2, 2-(1, 2-ethanedioxy) diethyl mercaptan as raw materials, adding a catalyst and an acid-binding agent, mixing, and heating for reaction to obtain the novel silane coupling agent. The invention provides a novel silane coupling agent and a preparation method thereof. The purposes of facilitating industrial production and obtaining high-purity and high-yield products are achieved.

The invention discloses a photocatalytic synthesis method of diethyl disulfide, and relates to the technical field of organic synthesis. The preparation method specifically comprises the following steps: mixing Co (NO3) 2.6 H2O and Ni (NO3) 2.6 H2O, and adding methanol to obtain a solution A; 2-methylimidazole and methyl alcohol are mixed, and a solution B is obtained; mixing the solution A and the solution B to obtain a zeolite imidazole framework material; selenium powder and the zeolite imidazole framework material are mixed and calcined, and a NiCoSe2 material is obtained; the preparation method comprises the following steps: mixing a NiCoSe2 material, ZnCl2, InCl3 and C2H5NS, adding an ethanol water solution, and carrying out microwave hydrothermal synthesis to obtain a NiCoSe2-coated ZnIn2S4 photocatalyst; the NiCoSe2-coated ZnIn2S4 photocatalyst and ethanethiol are subjected to a photocatalytic reaction under N2 atmosphere protection and visible light irradiation, and diethyl disulfide and hydrogen are generated. The method is mild in reaction condition and high in product stability.

This invention discloses a compound, octanoic acid 4-methyl-5-thiazole ethyl mercaptan ester, with the specific chemical structure shown below: The aromatic compound is mainly used in food flavorings.

The application belongs to the technical field of medicine synthesis, and particularly relates to a 5H-dibenzo[a,d]cycloheptatriene-5-ketone intermediate compound and a method for preparing 5H-dibenzo[a,d]cycloheptatriene-5-ketone. The method uses SM-1 as a starting material, reacts with ethanethiol first, and then is coupled with SM-2 to obtain the intermediate compound I-2, and the compound I-2 can be reacted for one step under the action of a catalyst to obtain 5H-dibenzo[a,d]cycloheptatriene-5-ketone. The preparation method solves the problems of complex operation and high toxicity in the prior art, is simple to operate, the obtained product has high yield and purity, the reaction period is short, and is suitable for industrial production.

The invention discloses a method for analyzing a polymeric lignin structural unit in watermelon peel, and belongs to the technical field of biological substance composition determination methods, the method comprises the following steps: S1, protective pretreatment: mixing a watermelon peel sample with a protective solution containing triphenylmethyl mercaptan; s2, thioacidolysis: adding a reaction solution containing boron trifluoride and ethanethiol, and heating for depolymerization; s3, in-situ neutralization and derivatization: adding a buffer solution, extracting and drying to obtain an organic phase, and then adding a silanization reagent for derivatization reaction; s4, qualitative and quantitative analysis; through the multi-level design of structure protection, efficient derivation and system integration, the established analysis method shows remarkable advantages in the aspects of inhibiting condensation reaction, improving operation safety, shortening analysis period and realizing quantification, effectively overcomes the technical bottlenecks of low recovery rate, high toxicity, long time consumption, incomplete detection and the like in the prior art, and has wide application prospects. And an excellent technical scheme is provided for composition analysis of the plant polymerized lignin.

The application discloses a compound, 4-methyl-5-thiazole ethyl mercaptide heptanoate, and a specific chemical structural formula is shown in the following formula: the aromatic compound is mainly applied to food essence.

The invention belongs to the field of chemical technology innovation, and relates to a preparation method of an ethanethiol catalyst synthesized by an ethylene vulcanization method. The catalyst is composed of a lanthanide metal modified alumina carrier and a transition metal, and shows excellent ethylene vulcanization addition activity in a pressure interval of 1.2-1.8 MPa and a temperature interval of 150-220 DEG C, the ethylene conversion rate reaches 99.5% or above, and the yield of ethanethiol reaches 93% or above.

The invention discloses an ethanethiol synthesis process based on cyclic utilization of hydrogen sulfide, simultaneously constructs a corresponding hydrogen sulfide dual-cycle recovery system, and belongs to the technical field of organic sulfur compound synthesis. The method mainly comprises the following steps: (1) synthesizing crude ethanethiol from a hydrogen sulfide (H2S) raw material and ethylene (CH2CH2) in a synthesis reaction system under the action of a catalyst; (2) pressurizing and liquefying unreacted hydrogen sulfide (H2S) tail gas after synthesis and condensation, and then returning the tail gas to a synthesis reaction system for recycling; and (3) separating and purifying the light component containing hydrogen sulfide (H2S) after rectification and light component removal, and then circulating to a raw material unit. The total utilization rate of H2S is greater than or equal to 98% through the circulating system, the raw material cost is reduced by more than 40%, the exhaust emission is reduced by 90%, and the problems of environmental pollution and resource waste caused by direct emission of H2S in the traditional process are effectively solved.

The application discloses a compound, 4-methyl-5-thiazole ethanethiol ester of decanoic acid, and a specific chemical structural formula is shown in the following formula: the aromatic compound is mainly applied to food essence.

The utility model discloses a 2-ethylthio-3-chloro-trifluorotoluene production device which comprises a DMF (Dimethyl Formamide) head tank, an ethanethiol head tank, a 2-fluoro-3-chloro-trifluorotoluene feeding pipe and an etherification reaction kettle, the etherification reaction kettle comprises a reaction kettle main body, a cooling jacket is arranged on a shell of the reaction kettle main body, and the cooling jacket is connected with the etherification reaction kettle. And a built-in cooling coil pipe is arranged in the shell of the reaction kettle main body. The etherification reaction kettle has the advantages that the built-in cooling coil pipe is additionally arranged on the basis of cooling of the jacket of the shell, frozen saline water can be fed into the etherification reaction kettle through the built-in cooling coil pipe, then heat released by reaction is directly taken away in time, solvent volatilization is reduced, meanwhile, side reaction can be effectively inhibited, and the service life of the etherification reaction kettle is prolonged. Impurities are reduced, and the yield of the intermediate is improved. In addition, the solvent volatilized along with the tail gas is condensed through the first condenser to be recycled, and the recycling rate of the solvent is increased.

This invention provides a fluorine-free silicone-containing waterproofing agent, its preparation method, and its application, belonging to the technical field of textile functional finishing agents. The fluorine-free silicone-containing waterproofing agent provided by this invention comprises, by mass percentage: 10-15% modified silicone resin, 10-15% modified polysiloxane, 1-5% surfactant, 5-10% organic solvent, and the balance being water. This invention modifies the silicone resin using 2-(trimethylsilane)ethanethiol and 3-chloro-1-propanethiol, introducing shorter-chain hydrophobic groups and polar groups with stronger hydrophobicity. Simultaneously, the modified silicone resin is dissolved using polysiloxane modified with shorter-chain hydrophobic groups, thereby improving the waterproofing and wash resistance of the fluorine-free silicone-containing waterproofing agent.

The application discloses a compound hexanoic acid 4-methyl-5-thiazole ethyl mercaptide, and a specific chemical structural formula is shown in the following formula: the aromatic compound is mainly applied to food essence.

The invention provides a fluoride-free silicon-containing waterproof agent and a preparation method and application thereof, and belongs to the technical field of textile functional finishing agents. The fluoride-free silicon-containing waterproof agent provided by the invention comprises the following components in percentage by mass: 10-15% of modified silicon resin, 10-15% of modified polysiloxane, 1-5% of a surfactant, 5-10% of an organic solvent and the balance of water. Silicon resin is modified through 2-(trimethylsilane) ethanethiol and 3-chloro-1-propanethiol, a short-chain hydrophobic group and a polar group which are higher in hydrophobicity are introduced, meanwhile, polysiloxane modified by the short-chain hydrophobic group is adopted for dissolving the modified silicon resin, and the waterproofness and the washability of the fluorine-free silicon-containing waterproof agent are improved.

The application discloses a compound nonanoic acid 4-methyl-5-thiazole ethyl mercaptide, and a specific chemical structural formula is shown in the following formula: the aromatic compound is mainly applied to food essence.

This invention discloses an analytical method for polymeric lignin structural units in watermelon rind, belonging to the technical field of biomaterial composition determination methods. The method includes the following steps: S1, protective pretreatment: mixing the watermelon rind sample with a protective solution containing triphenylmethanethiol; S2, thioacid hydrolysis: adding a reaction solution containing boron trifluoride and ethanethiol, followed by heating to depolymerize; S3, in-situ neutralization and derivatization: adding a buffer solution, extracting and drying to obtain the organic phase, then adding a silanizing reagent for derivatization; S4, qualitative and quantitative analysis. This invention, through a multi-level design of structure protection, efficient derivatization, and system integration, establishes an analytical method that exhibits significant advantages in inhibiting condensation reactions, improving operational safety, shortening the analysis cycle, and achieving quantification. It effectively overcomes the technical bottlenecks of existing technologies, such as low recovery rate, high toxicity, long processing time, and incomplete detection, providing an excellent technical solution for the analysis of the composition of plant polymeric lignin.

The invention discloses a foam liquid crystal elastomer for enhancing energy absorption by utilizing microsphere-induced shear deformation as well as a preparation method and application thereof, and relates to the technical field of liquid crystal elastomers. The preparation method of the foam liquid crystal elastomer comprises the following steps: mixing 2-methyl-1, 4-phenylene bis (4-(3-(acryloyloxy) propoxy) benzoate with methylbenzene, heating until the mixture is completely dissolved, adding 2, 2 '-(1, 2-ethanedioxy) diethyl mercaptan and tetrakis (3-mercaptopropionic acid) pentaerythritol ester, and uniformly stirring to obtain a liquid crystal elastomer solution; heating and expanding the microspheres, adding a liquid crystal elastomer solution in a heat preservation state, and uniformly stirring, or directly adding the microspheres into the liquid crystal elastomer solution at 85 DEG C, heating, and uniformly stirring; adding a catalyst or a photoinitiator, and uniformly stirring to obtain a foam liquid crystal elastomer solution; and pouring the foam liquid crystal elastomer solution into a mold, curing, and demolding to obtain the foam liquid crystal elastomer with high-strength energy absorption capacity.

The present application relates to a kind of solid adsorbents and its preparation method.Solid adsorbent is made of porous solid carrier and load two parts.Porous solid carrier includes molecular sieve, silica gel, alumina, hydrotalcite and its derivatives.Load is made of main agent and auxiliary agent, wherein main agent is the polyamide-amine of amine group and hydroxyl group modified end group, and the molar ratio of amine group and hydroxyl group is 1:1-1:1.5;Auxiliary agent is one or several of AMP, hydroxyethylpiperazine (HPZ), 1,8-diazabicyclo (7-undecene) (DBU), sulfolane (TS).Load is 25%-150% of the weight of porous solid carrier, and the mass fraction of main agent in load is 35%-80%.The present application has selective adjustable, adsorption speed is fast, adsorption capacity is large, and the removal rate of COS, methyl mercaptan, ethyl mercaptan and other organic sulfur is high.

The invention provides a fire alarm mycelium material and a preparation method and application thereof, and belongs to the technical field of fire alarm materials, and the fire alarm mycelium material comprises hemp stalks, ganoderma lucidum, ethanethiol and the like. The preparation method of the mycelium material comprises the following steps: carrying out mixed culture on a hemp stalk culture material and ganoderma lucidum; dissolving polyvinyl alcohol and lauryl sodium sulfate in deionized water; adding ethanethiol and polymethyl methacrylate into an organic solvent; dropwise adding the water phase into the oil phase, and emulsifying to obtain ethanethiol microcapsules; and mixing the pure mycelium material with ethanethiol microcapsules, culturing, and demolding to obtain the fire alarm mycelium material. According to the invention, intrinsic integration of a material structure and an early warning function is realized through a mycelium biological assembly and microcapsule embedding and fixing technology, so that the material becomes a sensing unit. According to the material, rapid and active fire early warning without external energy is realized by utilizing the temperature-triggered fracture characteristic of the microcapsules and the extremely low odor threshold value of ethanethiol.

The present invention relates to a process for the preparation of lyophilized 2-[(3-aminopropyl)amino]ethanethiol comprising the following steps: a) reacting an amifostine solution with a strong acid to obtain a 2-[(3-aminopropyl)amino]ethanethiol solution, and b) lyophilizing the 2-[(3-aminopropyl)amino]ethanethiol solution, with or without the addition of excipients.