20 results about "Propanethiol" patented technology

The invention discloses an impact-resistant industrial coating and a manufacturing method thereof, and relates to the technical field of industrial coatings. The impact-resistant industrial coating comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 2-5 parts of graphene oxide, 3-5 parts of an antistatic agent, 5-8 parts of a modified thickener, 1-3 parts of a dispersant, 0.5-1.5 parts of a leveling agent, 2-3 parts of an antioxidant, 8-12 parts of a curing agent and 100-140 parts of deionized water. The preparation method comprises the following steps: reacting polyethylene glycol diethylene oxide methyl ether with 2-(methacrylic acid) ethyl ester 3, 5-diaminobenzoic acid to generate a polymer; reacting the polymer with 3-(dimethylamino)-1-propanethiol to generate a tertiary amine-terminated polymer; and carrying out quaternization reaction on the tertiary amine-terminated polymer and bromododecane to obtain the antistatic agent. The impact-resistant industrial coating prepared by the invention has excellent antistatic property and rheological property.

The invention discloses a thermal antistatic fabric based on polyamide fibers and a preparation method thereof, and relates to the technical field of textile fibers. When the thermal antistatic fabric based on the polyamide fiber is prepared, caprolactam, a flame retardant and hexamethylenediamine react to prepare pre-modified polyamide; the pre-modified chinlon and 3-chloro-1-propanethiol are subjected to a reaction, and modified chinlon is prepared; the preparation method comprises the following steps: sequentially reacting graphene oxide with mercaptopropyltrimethoxysilane and 2-(2H-benzotriazole-2-yl)-4-methyl-6-(2-propenyl) phenol, so as to obtain modified graphene oxide; the modified chinlon and the modified graphene oxide are mixed and then subjected to melt spinning, and modified chinlon fibers are obtained; and twisting the modified polyamide fiber, spinning, and post-processing to obtain the thermal antibacterial fabric based on the polyamide fiber. The warm-keeping antistatic fabric based on the polyamide fiber has good warm-keeping, antistatic, flame-retardant, anti-aging and mechanical properties.

The invention relates to the technical field of lithium ion battery material recovery, in particular to a green stripping recovery method of a waste lithium iron phosphate battery positive electrode material. The method comprises the following steps: discharging and disassembling the waste lithium iron phosphate battery to obtain a positive pole piece; a hydrogen bond acceptor, a hydrogen bond donor and water are mixed, heated and stirred, the eutectic solvent is obtained, the hydrogen bond acceptor is inorganic salt capable of generating sulfate radical, nitrate radical, phosphate radical, carbonate radical or ammonium radical, and the hydrogen bond donor is one or more of urea, thiourea, tetraethylenepentamine, n-butylamine, N-ethylethylenediamine, 1-propanethiol and diallyl sulfide; and soaking and stripping the positive pole piece in the eutectic solvent to obtain the stripped and recycled positive pole material. According to the method, stripping and recycling of the positive electrode material are achieved, and the stripped and recycled positive electrode material is complete in structure, high in purity and good in electrochemical performance.

This invention relates to a method for preparing electronic-grade hydrofluoric acid. The invention utilizes a microchannel reactor for the fluorine oxidation reaction, significantly reducing fluorine consumption and safety hazards during production. Furthermore, the microchannel reactor enhances the gas-liquid two-phase mass transfer during the oxidation reaction, further improving impurity removal and product quality. The addition of multi-effect distillation to the distillation process not only enables secondary heat utilization but also saves on the use of high-temperature heating media at the bottom of the column, effectively reducing energy consumption. In the modified liquid, DMF serves as the solvent, cobalt nitrate provides cobalt ions, and vinylguanidine provides guanidine functional groups and amino groups. Ammonia and propanethiol are used as plasma gases to introduce amino and thiol groups onto the membrane surface. These groups help improve membrane selectivity, effectively separating metal and non-metal ions, as well as acidic impurities in the raw materials.

The present invention relates to the technical field of lithium-ion battery material recycling, and in particular to a green stripping and recycling method for waste lithium iron phosphate battery positive electrode materials. The method comprises the steps of: discharging and disassembling the waste lithium iron phosphate battery to obtain a positive electrode sheet; mixing a hydrogen bond acceptor, a hydrogen bond donor, and water with heating and stirring to obtain a low eutectic solvent, wherein the hydrogen bond acceptor is an inorganic salt capable of generating sulfate, nitrate, phosphate, carbonate, or ammonium, and the hydrogen bond donor is one or more of urea, thiourea, tetraethylenepentamine, mono-n-butylamine, N-ethylethylenediamine, 1-propanethiol, and diallyl sulfide; placing the positive electrode sheet in the low eutectic solvent for immersion stripping to obtain a stripped and recycled positive electrode material. The method of the present invention realizes the stripping and recycling of the positive electrode material, and the stripped and recycled positive electrode material has a complete structure, high purity, and exhibits excellent electrochemical properties.

The present invention relates to optical materials such as plastic lenses, prisms, and filters, and more particularly to a polythiol composition and its application. By adjusting the mass content of a thiol compound represented by formula (1) in a polythiol composition containing 2,3-dithio(2-mercapto)-1-propanethiol as a main component, the problem of a yellowish base color of the material due to excessively rapid cooling can be solved, ultimately regulating the base color of an optical material prepared from the polythiol composition.

The invention provides a synthetic method of 3-(dimethylamino)-1-propanethiol. The 3-(dimethylamino)-1-propanethiol is used as a raw material. According to the method, 3-chloro-1-bromopropane, an industrial 40% dimethylamine aqueous solution and sodium sulfide are used as raw materials, and 3-(dimethylamino)-1-propanethiol is obtained through continuous dimethylamino and thiolation in one pot. The method has the advantages of wide raw material source, low price, mild reaction condition, no intermediate separation and purification process, simple operation, high reaction yield, high product purity and very high industrial application value.

The invention discloses high-thermal-stability bisphenol A and a preparation method thereof. The high-thermal-stability bisphenol A comprises isopropenyl phenol with the mass concentration smaller than or equal to 10 ppm, preferably 3-8 ppm. The relationship between the content of isopropenyl phenol in the product and the ultraviolet light absorptivity of a melt in a special wave band is determined. The residual amount of isopropenyl phenol in the product is adjusted by adjusting the addition amount of n-propanethiol in the reaction process, so that the thermal stability of the bisphenol A product is automatically adjusted, and the high thermal stability of the product is ensured. The bisphenol A has the advantages of high thermal stability and low melting color number, and ensures the optical properties of downstream products.

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.

This invention discloses an impact-resistant industrial coating and its manufacturing method, relating to the field of industrial coating technology. The impact-resistant industrial coating comprises the following raw materials in parts by weight: 80-100 parts epoxy resin, 2-5 parts graphene oxide, 3-5 parts antistatic agent, 5-8 parts modified thickener, 1-3 parts dispersant, 0.5-1.5 parts leveling agent, 2-3 parts antioxidant, 8-12 parts curing agent, and 100-140 parts deionized water. This invention involves reacting polyethylene glycol diethylene oxide methyl ether with 2-(methacrylate) ethyl ester and 3,5-diaminobenzoic acid to generate a polymer; reacting the polymer with 3-(dimethylamino)-1-propanethiol to generate a terminal tertiary amine polymer; and reacting the terminal tertiary amine polymer with dodecane bromo to undergo a quaternization reaction to obtain the antistatic agent. The impact-resistant industrial coating prepared by this invention exhibits excellent antistatic and rheological properties.

The invention discloses a compound sweetening agent for reducing sugar and increasing sweetness by utilizing sulfides as well as a preparation method and application of the compound sweetening agent, and belongs to the technical field of food additives. Aiming at the problem that the risk of obesity and non-infectious diseases is increased due to high-sugar intake of the current sugar-containing beverage, the compound sweetening agent is prepared from the following raw materials: cane sugar, sodium cyclamate, sulfide and flower and fruit type spice, the sulfides comprise any one or more of four volatile sulfides, namely dipropyl disulfide, propanethiol, ethyl thioacetate and dipropyl trisulfide; the flower and fruit type spice is citral, ethyl butyrate and nerolidol; according to the sulfide compound sweetening agent prepared by the preparation method disclosed by the invention, the sweetness is increased through the use of sulfide, the flower and fruit type spice substances can achieve the effects of covering, enhancing and improving the mouth feel, and the bitterness of sodium cyclamate is improved, so that the sweetening effect can be realized on the premise of less sugar consumption.

The invention discloses a high-temperature-resistant anti-aging electronic component coating and a preparation method thereof, and relates to the technical field of coatings. The high-temperature-resistant anti-aging electronic component coating prepared by the invention is prepared from the following raw materials in parts by weight: epoxy resin, modified soybean oil, a silane fluorenyl epoxy monomer, a curing agent, modified mica powder and acetone. The preparation method comprises the following steps: enabling soybean oil to react with 3-(dimethylamino)-1-propanethiol and epoxy chloropropane in sequence, and introducing quaternary ammonium salt and an epoxy group to the soybean oil; the preparation method comprises the following steps: reacting bisphenol fluorene with dichlorodiphenyl silane and epoxy chloropropane in sequence to obtain an epoxy monomer containing a siloxane structure and fluorenyl, and participating in curing of the coating; mica powder with excellent thermal stability is subjected to surface modification with kh550 and then reacts with protocatechuic acid, and the protocatechuic acid is loaded on the mica powder. Through the improvement, the coating is endowed with excellent high-temperature resistance and antibacterial ability.

The present invention discloses a flame-retardant lithium battery separator and a preparation method thereof, relating to the technical field of battery separators. When preparing the flame-retardant lithium battery separator of the present invention, hexachlorocyclotriphosphazene and daidzein are polymerized and coated on the surface of phase change microcapsules to obtain modified phase change microcapsules; 1,7-dichloro-1,1,3,3,5,5,7,7-octamethyltetrasiloxane and phenolphthalein are polymerized and grown on pretreated bamboo powder to obtain pre-modified bamboo powder; the pre-modified bamboo powder and sodium hydroxide are reacted to obtain modified bamboo powder; polypropylene and N,N-dimethylallylamine are reacted to obtain pre-modified polypropylene; the pre-modified polypropylene and 3-chloro-1-propanethiol are reacted to obtain modified polypropylene; the modified polypropylene, modified phase change microcapsules, modified bamboo powder and azobisisobutyronitrile are formulated into a spinning solution, and the flame-retardant lithium battery separator is prepared by electrospinning. The flame-retardant lithium battery separator prepared by the present invention has excellent flame retardancy, thermal stability, ionic conductivity and mechanical properties.

The invention is suitable for the technical field of reactors, and provides a preparation method and application of a surface modified copper-based superstructure nanoreactor. According to the method disclosed by the invention, by constructing and combining mercaptan modification and high-pressure CO2 supersaturation strategies, the target of efficiently converting CO2 into a multi-carbon product through electroreduction is achieved. A cavity is formed between the Cu NP and the carbon shell through nitric acid etching, a space is provided for CO2 enrichment and three-phase interface formation, the * CO intermediate concentration is increased through the confinement effect, and C-C coupling is promoted; and the stability is enhanced by carbon shell encapsulation. Hydrophilicity and hydrophobicity are regulated through modification of propanethiol, establishment of a three-phase interface is assisted, hydrogen evolution reaction is inhibited, and C-C coupling energy barriers are reduced. The C2 product selectivity (= 90.11%) reaches an excellent level; and the ethanol selectivity (FEethol) can be up to 70.15% at most, and a key barrier is broken through for industrial application of a CO2RR technology.

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 present invention discloses a corrosion-resistant flaky silver-coated copper powder, a preparation method thereof, and an electromagnetic shielding housing. The preparation method of the corrosion-resistant flaky silver-coated copper powder includes: adding flaky copper powder and a complexing agent into water and dispersing uniformly to obtain an aqueous copper powder solution; adding the aqueous copper powder solution and a corrosion inhibitor into an aqueous solution containing a reducing agent and dispersing uniformly to obtain a copper powder reduction solution; adding a silver ammonia solution and a stabilizer into the copper powder reduction solution for a reduction reaction to obtain silver-coated copper powder particles, and after precipitation and filtration, the corrosion-resistant flaky silver-coated copper powder is obtained; the above stabilizer is obtained by carrying out a quaternization reaction on 3-dimethylamino-1-propanethiol and sodium 3-bromopropanesulfonate. The present invention reacts flaky copper powder with silver ammonia under specific stabilizer conditions, thereby effectively improving the coating property, oxidation resistance, coating uniformity and compactness of the obtained silver-coated copper powder, and enabling the obtained silver-coated copper powder to be efficiently applied to the electromagnetic shielding housing.

The present invention provides a method for in vitro expression and purification of a thiolquinone oxidoreductase derived from Pseudomonas, and its application to the degradation of propanethiol. This method uses the whole genome of Pseudomonas putida S-1, which can efficiently degrade propanethiol, as a template to clone the thiolquinone oxidoreductase encoding gene sqr. pET28a is selected as the expression vector, and the sqr gene and the linearized vector are used to construct the recombinant plasmid pET28a-sqr by one-step cloning. The recombinant plasmid is introduced into Escherichia coli BL21 by heat shock transformation, and the BL21 / pET28a-sqr expression strain is successfully constructed. After culturing and induction, the SQR protein is purified by gravity method with a histidine tag after ultrasonic disruption. Subsequently, BL21 / pET28a is used as a control strain, and the ability of the recombinant expression strain and the SQR protein to transform propanethiol is determined based on gas chromatography-mass spectrometry (GC-MS). Obtaining a thiolquinone oxidoreductase and characterizing its function of transforming propanethiol by the method provided by the present invention will be beneficial to the application and transformation of thiol-degrading bacteria.

The invention discloses a hydrogen sulfide corrosion inhibitor and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The hydrogen sulfide corrosion inhibitor is prepared from the following components in parts by weight: 35 to 50 parts of alkyne oxygen thiol compound, 25 to 40 parts of chlorinated benzyl quinoline quaternary ammonium salt and 20 to 30 parts of surfactant, and the surfactant is at least one of OP-10, AEO-10, NP-10 and TX-10. The preparation method of the hydrogen sulfide corrosion inhibitor comprises the following steps: slowly adding the metal sodium wire into the propargyl alcohol, controlling the temperature to be a first set temperature in the adding process, controlling the temperature to be a second set temperature after the metal sodium wire is added, and continuously reacting for a set time to obtain a sodium propargyl alcohol product; taking the sodium propargyl alcohol product and 3-chloro-1-propanethiol as reactants, and carrying out chlorination reaction to obtain an alkyne oxygen thiol compound; the preparation method comprises the following steps: stirring and mixing the alkyne oxythiol compound, the chlorinated benzyl quinoline quaternary ammonium salt and the surfactant to obtain the hydrogen sulfide corrosion inhibitor.

A polythiol composition, comprising 2,3-dithio(2-mercapto)-1-propanethiol and an impurity having a structure represented by general formula (II); wherein any one of R1 and R2 is -SH, and the other is -OH; and the mass content of the impurity having the structure represented by general formula (II) is less than or equal to 8.0%. By controlling the content of the impurity (II) in the polythiol composition mainly composed of 2,3-dithio(2-mercapto)-1-propanethiol, the refractive index of the composition is improved and stabilized, and the quality of the optical material prepared from the polythiol composition is further improved.

The invention discloses a method for strengthening accumulation of extracellular elemental sulfur by pseudomonas putida during degradation of propanethiol through gene knockout. The method comprises the following steps: by taking a propanethiol degrading bacterium Pseudomonas putida S-1 as an original strain, in a basic salt culture medium taking propanethiol as a unique carbon source, the S-1 can degrade propanethiol and generate separable extracellular elemental sulfur (sulfur balls) at the same time; extracellular sulfur ball accumulation can be enhanced by knocking out the persulfide dioxygenase coding gene in the S-1 strain, the yield of the extracellular elemental sulfur is increased by 69.2% compared with that of a wild type, and the yield of the elemental sulfur is increased while propanethiol is degraded by microorganisms.