41 results about "Ethanethiol" patented technology

The invention relates to a preparation method of a cardanol compound 2. The reaction is as follows: # imgabs0 # R'is selected from H, carboxyl, halogen or halogen substituted C1-4 alkyl, and halogen is selected from fluorine, chlorine, bromine and iodine; comprising the following steps: (1) reacting a compound of formula 1 in the presence of sodium ethanethiol and inorganic base to obtain a compound 2; the preparation method provided by the invention is mild in process condition, simple and convenient to operate, high in yield, simple in post-treatment and suitable for industrial large-scale production.

The invention discloses a preparation method and application of a monatomic catalyst for catalytic degradation of ethanethiol, and belongs to the technical field of organic sulfur pollutant treatment.The atomic-scale dispersion of Ce species is achieved through HY molecular sieve FAU type topological structure constraint and cerium loading capacity limitation, the catalyst shows atomic-scale active sites, and the catalytic degradation of ethanethiol is achieved. The conversion path of ethanethiol can be accurately regulated and controlled, and efficient degradation of ethanethiol is realized; the topological confinement effect guarantees the stability of the monatomic catalyst, and the HY molecular sieve pore channel restrains migration of Ce atoms and inhibits agglomeration of Ce metal, so that the monatomic catalyst shows good anti-sintering ability, and at the same time, sulfur poisoning and carbon deposition rate are slowed down.

The invention provides a preparation method and application of a catalyst for selective production of ethanethiol. The catalyst comprises an active component, an auxiliary agent and a molded alumina carrier, the active component comprises the following components in percentage by mass: 5-10% of VIII group transition metal oxide and 15-20% of VIB group metal oxide, and the auxiliaries comprise 0.5-4% of alkali metal, 1-3% of alkaline earth metal oxide, 0.6-2% of cerium oxide and 1-4% of phosphorus pentoxide. A bifunctional catalyst with moderate Lewis acid-base sites is constructed by compounding a multi-component aid and an active component, and the catalyst shows excellent catalytic activity that the ethylene conversion per pass is greater than or equal to 98%, the ethanethiol selectivity is about-95% and the ethanethiol yield is-90% under the reaction conditions that the hydrogen sulfide / ethylene feeding mass ratio is 3-5, the temperature is 180-210 DEG C, the pressure is 0.5-1.0 MPa and the volume space velocity is 200-300 h <-1 >. And the catalyst can stably run for 1250 hours or more.

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 relates to a solid adsorbent and a preparation method thereof. The solid adsorbent is composed of a porous solid carrier and a load. The porous solid carrier comprises a molecular sieve, silica gel, aluminum oxide, hydrotalcite and derivatives thereof. The load is composed of a main agent and an auxiliary agent, the main agent is polyamide-amine of which the terminal group is modified by amino and hydroxyl, and the molar ratio of the amino to the hydroxyl is 1: 1-1: 1.5; and the auxiliary agent is one or more of AMP (adenosine monophosphate), hydroxyethylpiperazine (HPZ), 1, 8-diazabicyclo undec-7-ene (DBU) and sulfolane (TS). The load accounts for 25%-150% of the weight of the porous solid carrier, and the mass fraction of the main agent in the load is 35%-80%. The method has the advantages of adjustable selectivity, high adsorption speed, large adsorption capacity and high removal rate of COS, methyl mercaptan, ethanethiol and other organic sulfur.

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.

The invention relates to a composition for a PSE elastomer, the PSE elastomer and a preparation method of the PSE elastomer, and belongs to the technical field of high polymer material science and engineering. The composition comprises the following components in percentage by mass: 72 to 80 weight percent of PUSH resin, 19 to 28 weight percent of bisphenol A epoxy resin and 0.3 to 1 weight percent of accelerant, wherein the PUSH resin is obtained by polymerizing isocyanate, a combination A and 2, 2 '-(1, 2-ethanedioxy) diethyl mercaptan according to a molar ratio of 1: (0.4-0.6): (0.9-1.1), and the combination A is prepared from polypropylene glycol and polyether triol according to a molar ratio of 1: (0.3-4). The PSE elastomer provided by the invention has excellent comprehensive damping performance and especially has a wider damping temperature range.

The invention relates to an anti-perovskite positive electrode material, a preparation method thereof and a lithium ion battery, and belongs to the technical field of lithium batteries. The preparation method comprises the following steps: mixing metal salt containing metal M with ethanethiol and water, and carrying out hydrolysis reaction to obtain a product solution; adjusting the pH value of the product solution to 2-4, adding a metal salt containing metal N, lithium ethoxide, a polymeric monomer, a cross-linking agent and an initiator into the product solution, and carrying out a polymerization reaction to generate wet gel; and drying the wet gel, and carrying out heat treatment to obtain the anti-perovskite type positive electrode material Li2MxNySO. Through the preparation method, the internal particle size of the positive electrode material can be relatively small, and the internal particle distribution is more uniform, so that the cycle performance and the rate capability of the lithium ion battery are improved.

The invention discloses a paper-based detection method for detecting ethanethiol, which comprises the following specific steps: firstly, by taking silver nitrate as a silver source, oleylamine as a modifier, xylene as an organic solvent and ascorbic acid as a reducing agent, preparing oleylamine modified hydrophobic silver nanoparticles through an organic solvent chemical reduction method; a paper-based colorimetric sensor array with silver nanoparticle sensing element points in a 1 * 5 mode is constructed on a hydrophobic PVDF paper base. And finally, applying the paper-based sensor to qualitative and quantitative analysis detection of ethanethiol gas. The lowest detection limit of the obtained methyl mercaptan is 20.9 ppb. The paper-based sensor has excellent specific recognition capability on ethanethiol, and is high in sensitivity and high in response speed. The silver nanoparticle paper-based colorimetric sensor array provided by the invention has the characteristics of low cost, high sensitivity and strong selectivity, can quickly and effectively detect the content of ethanethiol, and reduces the harm of ethanethiol to human and environment.

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 invention relates to the technical field of composite wall materials, in particular to a flame-retardant and anti-aging composite wall material and a preparation process thereof. The waterproof coating comprises the following components: 0.5 to 1.5 parts by weight of an antioxidant, 13 to 17 parts by weight of Portland cement, 2 to 4 parts by weight of epoxy resin, 1 to 3 parts by weight of polyurethane, 0.8 to 1.2 parts by weight of an ethylenediamine curing agent, 2 to 6 parts by weight of glass fiber, 4 to 8 parts by weight of aluminum hydroxide, 3 to 11 parts by weight of 2-diphenylphosphine ethanethiol, 2 to 4 parts by weight of a polydimethylsiloxane waterproof agent and 2-(2-diphenylphosphine ethanethiol). The component A comprises the following components in parts by weight: 0.1-0.5 part of 2 '-hydroxy-5'-methylphenyl) benzotriazole, 0.2-0.4 part of lauryl sodium sulfate and 55-65 parts of a fly ash filling material; wherein the antioxidant is prepared by mixing amifostine mercaptan and a coupling agent according to a molar ratio of 1: (1.0-1.2); the coupling agent is prepared by mixing hexamethylene diisocyanate and gamma-glycidyl propyl trimethoxy silane; the curing agent is a mixture of a curing agent and a curing agent; the antioxidant is adopted, so that the anti-aging and flame-retardant effects of the wall material are improved, the interface compatibility is improved, and the stability of the material is improved.

The invention relates to the field of chemical synthesis, in particular to a novel method for synthesizing beta-ethylthiobutyraldehyde, which comprises the following steps: S1, adding an anhydrous polar aprotic solvent which is dried by a 4A molecular sieve and subjected to nitrogen bubbling for 30 minutes to remove oxygen into a reactor provided with an external circulation cooling system under the conditions that the illumination intensity is less than or equal to 50lux in an amber glass reactor, and reacting for 1-2 hours at the temperature of 20-30 DEG C; the water content of the anhydrous polar aprotic solvent is less than or equal to 0.01%, the oxygen content of the anhydrous polar aprotic solvent is less than 5ppm, tetrahydrofuran, diethyl ether or methyl tert-butyl ether is selected as the solvent, the use amount of the solvent is 4 times of the mass of ethanethiol, ethanethiol with the purity of more than or equal to 99% and crotonaldehyde are added according to the molar ratio of 1: (1.05-1.2), high-purity nitrogen is introduced for replacement three times, the nitrogen micro-positive pressure is maintained in the whole process, and the temperature is controlled to be less than or equal to 10 DEG C through external circulation. According to the method, production can be performed in a low-temperature environment, triethylamine serving as a catalyst is not needed, so that unit consumption is lower, and the synthesized beta-ethylthiobutyraldehyde is more stable, less in decomposition and higher in yield and content due to low synthesis temperature.

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 present application relates to an antiperovskite cathode material and a preparation method thereof, and a lithium-ion battery, belonging to the technical field of lithium batteries. The preparation method comprises: mixing a metal salt containing metal M with ethanethiol and water, performing a hydrolysis reaction to obtain a product solution; adjusting the pH of the product solution to 2-4, adding a metal salt containing metal N, lithium ethoxide, a polymerization monomer, a crosslinking agent, and an initiator to the product solution for polymerization reaction to generate a wet gel; drying the wet gel and then heat-treating it to obtain an antiperovskite cathode material Li2M x N y Through this preparation method, the internal particle size of the positive electrode material can be made smaller and the internal particle distribution more uniform, thereby improving the cycle performance and rate performance of the lithium-ion battery.

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 invention provides a preparation method of diethylaminoethanethiol, which comprises the following step: enabling gaseous episulfide ethane and gaseous diethylamine to be in contact for reaction to obtain reaction liquid containing diethylaminoethanethiol. The preparation method of the diethylaminoethanethiol provided by the invention is simple and convenient to operate, and the diethylaminoethanethiol can be obtained with high yield and high purity.

The invention discloses a high-purity ethyl sulfide rectification process and an integrated system thereof, and belongs to the technical field of chemical rectification. The high-purity ethyl sulfide rectification integrated system comprises a liquid injection device, a precise temperature control heating device, a rectification tower and an automatic shunting and collecting device which are connected in sequence, wherein the rectification tower and the automatic shunting and collecting device are connected in series; and the rectifying tower mainly comprises a plurality of rectifying columns which are arranged in parallel. According to the invention, the plurality of rectifying columns are connected in parallel and systematized and then connected in series for continuous rectification of ethanethiol, and the rectification purity of ethanethiol is continuously improved by means of multi-stage rectification and control of discharging at different reflux ratios at different temperatures, so that the defect that the high purity of 99% cannot be achieved in the existing ethanethiol rectification technology is overcome; the contradiction between the height, the pipe diameter and the like of a single rectifying column and the handling capacity is solved, and the requirements of high purity, high flux and high efficiency in the ethyl sulfide rectifying technology are met.

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.

The invention discloses an application of capsaicin in improving fish meat quality, and belongs to the technical field of aquaculture. The improvement of the fish meat quality by capsaicin is realized by improving the meat yield, increasing the crude protein content, slowing down the pH decreasing amplitude, reducing the cooking loss, improving the hardness, improving the freshness, increasing the sweet taste and the salty taste, inhibiting the generation of methyl mercaptan and ethanethiol, promoting the synthesis of fresh flavor substances, increasing the contents of ATP, Ca < 2 + >-Mg < 2 + >-ATPase, creatine kinase, HK and glycogen and reducing the lactic acid content. By adding low-dose capsaicin into the fish feed for feeding fish, the flavor quality of aquatic products can be effectively improved, and technical support is provided for application of low-dose natural additives in the field of aquatic product preservation and aroma enhancement.

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 present invention provides a fluorescent flexible tensile sensor, a preparation method, and applications thereof. The method comprises: dissolving 1,4-bis-[4-(3-acryloxypropoxy)benzoyloxy]-2-methylbenzene, 2,2′-(1,2-ethylenedioxy)bis-ethanethiol, and pentaerythritol mercaptopropionate in a solvent to obtain a RM mixture; adding an aggregation-induced luminescence material and a catalyst to the RM mixture to carry out a catalytic polymerization reaction to obtain a reaction mixture; curing the reaction mixture in a mold, and drying and removing the solvent to obtain a fluorescent flexible tensile sensor. The present invention combines the aggregation-induced luminescence material with a liquid crystal elastomer through a cross-linking reaction to prepare a wireless force sensor that is flexible, highly stretchable, and wirelessly resistant to electromagnetic interference, and is low in cost and lightweight.

The invention particularly relates to a preparation method of N, N-diethylaminoethanethiol in the technical field of medicines, and the preparation method comprises the following steps: ethylene carbonate and thiourea react to generate episulfide ethane, and the episulfide ethane in a gas state and diethylamine are mixed by a micro-nano bubble device and enter a tower reactor to react to prepare the N, N-diethylaminoethanethiol. The preparation method of the N, N-diethylaminoethanethiol is continuous in production, clean in process, free of emission of toxic and odorous ethane episulfide, free of self-polymerization, high in product yield, good in purity, low in cost and suitable for industrial production.

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.