37 results about "Butyl bromide" patented technology

The invention discloses an imidazole polymer electrolyte membrane in an energy storage lithium battery, and a preparation method and application thereof, and belongs to the field of polymer electrolyte. The method comprises the following steps: reacting 1-ethylimidazole with n-butyl bromide to prepare brominated 1-ethyl-3-butylimidazole; the preparation method comprises the following steps: preparing 1-ethyl-3-butylimidazole bis (fluoromethane sulfonyl) imide salt from brominated 1-ethyl-3-butylimidazole and lithium bis (fluoromethane sulfonyl) imide; the preparation method comprises the following steps: uniformly mixing 1-ethyl-3-butylimidazolium bis (fluoromethane) sulfonimide salt, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bis (trifluoromethane) sulfonimide, divinylbenzene and benzoin diethyl ether, coating and curing to obtain the imidazolium ionic liquid polymer electrolyte membrane. According to the imidazolium ionic liquid polymer electrolyte membrane, integration of triple functions of rigid framework-flexible transmission-interface stability is realized, and the electrical property and the mechanical property of the membrane are remarkably improved.

The application discloses a synthesis method of afugan, which comprises the following steps: 1-[3-chloro-5-(trifluoromethyl)phenyl]-2,2,2-trifluoroacetone and 4-acetylnaphthalene carboxylic acid are added into a solvent, a base is added, DMAP is added after complete reaction at 50-80 DEG C, acetic anhydride is added dropwise, tetrabutylammonium bromide is added after complete reaction, and an aqueous solution of sodium hydroxide and hydroxylamine hydrochloride is added, and reaction is carried out at 0-5 DEG C, so that an intermediate is obtained; the intermediate is reacted with acyl chloride under the action of DMF and dichloromethane, so that 4-(5-(3-chloro-5-(trifluoromethyl)phenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazole-3-yl)-1-naphthalene carboxylic chloride is prepared; 2-amino-N-(2,2,2-trifluoroethyl)acetamide hydrochloride and a dichloromethane solution of a base are added dropwise, and reaction is carried out at 0-5 DEG C, so that afugan is obtained. The method has a short route, high yield and suitability for large-scale industrial production.

The invention relates to the technical field of preparation of tert-butyl carbamate, in particular to a preparation method of (R)-(1-([1, 1 '-biphenyl]-4-yl)-3-oxopropane-2-yl) tert-butyl carbamate. Comprising the following steps: S1, taking a four-mouth bottle, adding 1780 g of dichloromethane, 165 g of (R)-tert-butyl (1-([1, 1 '-biphenyl]-4-yl)-3-hydroxypropane-2-yl) carbamate, 1.6 g of TEMPO and 2 g of tetrabutylammonium bromide into the four-mouth bottle, and stirring the four-mouth bottle, the dichloromethane, the (R)-tert-butyl (1-([1, 1'-biphenyl]-4-yl)-3-hydroxypropane-2-yl) carbamate, the TEMPO and the tetrabutylammonium bromide; s2, 33.5 g of a sodium bromide solution and 146 g of clear water of a phosphoric acid mixed salt solution are added into the four-opening bottle after stirring in the step S1, and liquid in the four-opening bottle is cooled to a specified temperature; s3, sodium hypochlorite with the available chlorine content being 9-10% is dropwise added into the four-opening bottle cooled in the S2; and S4, after dripping in the step S3 is completed, preserving the heat of the liquid in the four-mouth bottle, and adding 385 g of a sodium thiosulfate solution into the bottle for quenching reaction. And S5, sampling and detecting. The pH value buffering agent of a phosphate system, namely a sodium dihydrogen phosphate-disodium hydrogen phosphate composite salt system, is used, and the yield is 90-96%.

The invention belongs to the technical field of wet metallurgy extraction agents, and particularly relates to an amide extraction agent and a preparation method and application thereof. The preparation method of the amide extracting agent comprises the following steps: (1) putting n-butyl bromide and sec-butylamine into a reactor, reacting in a homogeneous reactor for 6-10 hours, washing with a saturated sodium bicarbonate solution after the reaction is finished, then separating liquid, and carrying out rotary evaporation on an organic phase to obtain N-butyl sec-butylamine; (2) dissolving N-butyl sec-butylamine in an organic solvent, dropwise adding diglycyl chloride into the solvent at-20 to 0 DEG C, reacting at room temperature for 1-5 hours after dropwise adding, filtering to remove precipitate, washing an organic phase with hydrochloric acid and secondary water in sequence, removing water with anhydrous sodium sulfate, performing rotary evaporation on the organic phase, and performing vacuum drying on a product to obtain the N, N '-di-n-butyl-N, N'-diglycyl chloride. The catalyst is N, N '-di-sec-butyl-3-oxoglutaramide.

This invention provides a method for preparing tetrabutylphosphine acetate and simultaneously producing sodium bromide, belonging to the field of organophosphine salt preparation and electrodialysis separation technology. The method provided by this invention uses sodium acetate and tetrabutylphosphine bromide as raw materials, and prepares tetrabutylphosphine acetate and simultaneously produces sodium bromide via displacement electrodialysis. This achieves efficient ion exchange between tetrabutylphosphine bromide and sodium acetate, and simultaneous recovery of sodium bromide. The preparation method is simple, avoids the use of large amounts of chemical reagents, and reduces environmental pollution.

The invention relates to the field of synthesis and preparation of hydroquinone, in particular to a synthesis method of high-purity hydroquinone. In order to solve the problem that in the existing process of preparing hydroquinone through a phenol hydrogen peroxide oxidation method, the selectivity of hydroquinone (HQ) is improved, and by-products with similar microstructures are generated synergistically and are difficult to remove, a composite catalysis synergistic inhibition system of phosphotungstic acid, tetrabutylammonium bromide and imidazole is adopted; through the synergistic effect of the main catalyst, the selectivity regulator and the byproduct inhibitor, HQ selectivity improvement and synchronous inhibition of trace byproducts are achieved under the optimized reaction condition, the total content of the trace byproducts is smaller than or equal to 45 ppm, the purity of the final hydroquinone product is larger than or equal to 99.995%, and the high-end application requirements of electronic-grade and photoresist raw materials are met. The technology is compatible with existing industrial equipment, operation is easy, and industrial production is met.

The invention relates to a multi-element thermodynamic accelerant for sealing carbon dioxide by hydrate and application of the multi-element thermodynamic accelerant, the multi-element thermodynamic accelerant comprises sodium glycinate (NaGly), octyl glucoside (OGP) serving as a surfactant, tetrabutylammonium bromide (TBAB) serving as a thermodynamic accelerant and tetrahydrofuran (THF) serving as an organic solvent, and after the sodium glycinate (NaGly), the octyl glucoside (OGP) serving as a surfactant, the tetrabutylammonium bromide (TBAB) and the tetrahydrofuran (THF) are mixed with water, the mass percent concentration of the NaGly is 0.001-1wt%, the mass percent concentration of the OGP is 0.001-1wt%, the mass percent concentration of the TBAB is 5-50wt%, and the mass percent concentration of the THF is 4-40wt%. NaGly can improve the stability of the hydrate, OGP can improve the generation rate of the hydrate, TBAB can improve the formation speed and efficiency of the hydrate, THF can promote rapid generation of the hydrate, the generation speed of the hydrate is remarkably increased through cooperation of NaGly, OGP, TBAB and THF, the generation time is shortened, and the storage efficiency of carbon dioxide is effectively improved.

The present invention relates to the technical field of p-chlorophenylglycine preparation, and proposes a method for preparing p-chlorophenylglycine, comprising the following steps: S1, mixing ammonia water and sodium hydroxide solution, and introducing ammonia gas until saturated to obtain a mixed solution I; S2, adding p-chlorobenzaldehyde and a phase transfer catalyst to chloroform to obtain a mixed solution II; S3, adding the mixed solution II to the mixed solution I, adding ammonium bicarbonate, and stirring for reaction to obtain p-chlorophenylglycine; the phase transfer catalyst comprises tetrabutylammonium bromide and polyethylene glycol 400; the molar ratio of tetrabutylammonium bromide to polyethylene glycol 400 is 7:1-7. The above technical solution solves the problem of low p-chlorophenylglycine yield in the related art.

The invention provides a method for preparing 2, 4, 6-tri (4 '-butoxy-2'-hydroxyphenyl)-triazine, which comprises the following steps: in the presence of an alkaline reagent, dissolving m-bromophenol and n-butyl bromide in a first solvent to carry out nucleophilic substitution reaction, and after the reaction is finished, carrying out post-treatment to obtain 1-bromo-3-butoxybenzene; magnesium chips and an initiator are dissolved in a second solvent for a reaction, then the 1-bromo-3-butoxybenzene is dropwise added for a Grignard reaction, and a 3-butoxybenzene Grignard reagent is obtained; dropwise adding boric acid ester into the 3-butoxybenzene Grignard reagent for reaction, and then adding an oxidizing agent for oxidation reaction to obtain 3-butoxyphenol; 3-butoxyphenol and cyanuric chloride are dissolved in a third solvent for a reaction, lewis acid is added for a Friedel-Crafts reaction, after the reaction is finished, aftertreatment is conducted, and the 2, 4, 6-tri (4 '-butoxy-2'-hydroxyphenyl)-triazine is obtained.The preparation method is lower in cost, higher in yield, high in product quality and easy to control.

The invention relates to the technical field of layered composite fabrics, in particular to a layered composite fabric based on a waterproof and weather-resistant coating, a preparation method and application. The layered composite fabric comprises an outer-layer fabric and an inner-layer fabric, the inner-layer fabric is a bamboo cotton fabric, the outer-layer fabric is a nylon fabric with a waterproof and weather-resistant coating, and the nylon fabric with the waterproof and weather-resistant coating is prepared by dipping a bio-based nylon fabric in a composite finishing agent and curing the bio-based nylon fabric. The composite finishing agent is prepared by the following steps: carrying out a reaction on diisocyanate, polyether polyol, bio-based polyester polyol and hydroxyl-terminated polydimethylsiloxane in N, N-dimethylacetamide, so as to prepare a polyurethane prepolymer solution; n-octadecyl diethanolamine is added for a chain extension reaction; n-butyl bromide is added, and quaternization reaction is carried out; and finally, adding the composite weather-resistant auxiliary agent, and stirring to obtain the composite finishing agent.

The application belongs to the field of organic synthesis, and particularly relates to a method for synergistically synthesizing 1,1-diaryl-2-alkyl compounds by using nickel and light. The method comprises the following steps: using styrene derivatives, p-bromoacetophenone and tert-butyl bromide as raw materials, and mixing a metal nickel catalyst (nickel bis(acetylacetone)), a photocatalyst (1,2,3,5-tetrakis(carbazole-9-yl)-4,6-dicyano benzene), a nitrogen ligand ((4S,4'S)-1,1'-bis(3-tert-butylphenyl)-4,4',5,5'-tetrahydro-4,4'-bis[(1S)-1-methylpropyl]-2,2'-bis-4H-imidazole), a Bronsted base (N,N-dicyclohexylmethylamine), a reducing agent (1,4-dihydropyridine derivatives) and an organic solvent (glycol dimethyl ether, isopropyl ether) to generate a three-component cross-coupling reaction and synthesize 1,1-diaryl-2-alkyl compounds with one chiral center. The three-component cross-coupling reaction is realized by using nickel and light, so that the use of a metal reducing agent is avoided, and the preparation raw materials are not needed. The method has the advantages of high reaction yield, high enantiomeric selectivity, fast reaction speed, easy-to-obtain raw materials and simple process.

The present application provides a method for extracting a phenol compound and a pyridine compound from naphthalene oil stepwise by using a deep eutectic solvent (DES). The method comprises: step 1, mixing a naphthalene oil with an alkane and a DES and performing liquid separation on the mixture to obtain a deep eutectic extraction phase and a solvent raffinate phase; step 2, mixing the deep eutectic extraction phase with a first back-extraction agent and filtering the mixture to obtain a first back-extraction phase and a recyclable DES; step 3, distilling the first back-extraction phase to obtain a heteroatom mixture, mixing the heteroatom mixture with a hydrogen-acceptor-type deep eutectic extraction agent and an alkane, and performing liquid separation on the mixture to obtain a deep eutectic phenol compound extraction phase and a pyridine compound and alkane raffinate phase; and step 4, mixing the phenol compound extraction phase with a second back-extraction agent and filtering the mixture to obtain a phenol-containing second back-extraction solution and a hydrogen-acceptor-type extraction agent. A phenol product is recovered from a second back-extraction agent solution by distillation. The DES is tetraethylammonium chloride, tetrabutylammonium chloride, tetrabutylammonium bromide or tetrabutylphosphonium bromide, and glycolic acid, oxalic acid, citric acid, or p-toluenesulfonic acid.

The present invention belongs to the field of biochemistry and relates to a method for preparing a biochemical product having H2S and 1 O2 synergistically drives the BODIPY flavonoid nanoreagent of CO release ability and its preparation method and application. It is wrapped in the hydrophobic inner cavity of the micelle formed by mPEG DSPE2000, and the outer layer of the micelle is a silicon shell formed by N trimethoxysilylpropyl N, N, N tri-n-butylammonium bromide, which significantly improves the water solubility of the molecule. The core-shell structure of the formed nanomolecule is relatively stable, which can significantly improve the stability of the molecule in water. The iodinated BODIPY flavonoid compound of the present invention has very good photodynamic effect and CO release ability, has a very high singlet oxygen production efficiency under 660nm light irradiation, and has excellent stability. It has and its considerable application prospects in photodynamic and gas therapy in the fields of biochemistry and medicine. The phototherapy reagent synthesis method provided by the present invention is simple and relatively low in cost.

The invention relates to a composite hydrate inhibitor for carbon sequestration, which comprises polyvinylpyrrolidone (PVP) serving as a kinetic inhibitor, tetrabutylammonium bromide (TBAB) serving as a thermodynamic accelerant and tetrahydrofuran (THF) serving as an organic solvent, and after the polyvinylpyrrolidone (PVP), the tetrabutylammonium bromide (TBAB) and the tetrahydrofuran (THF) are mixed with water, the concentrations of the PVP, the TBAB and the THF are respectively as follows: 0.001-1wt% of the PVP, 0-50wt% of the TBAB and 0-50wt% of the THF. The PVP, the TBAB and the THF are combined according to the proportion to form the composite hydrate inhibitor, and through the synergistic effect of the PVP, the TBAB and the THF, the generation speed of hydrates is increased, the carbon dioxide storage efficiency is improved, meanwhile, the aggregation degree of the hydrates can be reduced, and the blocking probability is reduced.

The application discloses a method for degrading tetrabutylphosphonium bromide by using tetrahymena. The method is for degrading tetrabutylphosphonium bromide by using tetrahymena in a starvation medium under aerobic conditions. The application first proposes the purpose of eliminating tetrabutylphosphonium bromide through biological degradation of tetrahymena pyriformis. The application provides a new idea for degradation of tetrabutylphosphonium bromide, and has potential to be further optimized and popularized. The method has the advantages of green environmental protection and no energy consumption.

The present invention discloses an imidazole polymer electrolyte membrane for energy storage lithium batteries, a preparation method, and applications thereof, belonging to the field of polymer electrolytes. The method comprises reacting 1-ethylimidazole with n-butyl bromide to produce 1-ethyl-3-butylimidazole bromide; reacting 1-ethyl-3-butylimidazole bromide with lithium bis(trifluoromethanesulfonyl)imide to produce 1-ethyl-3-butylimidazole bis(fluoromethanesulfonyl)imide salt; and uniformly mixing 1-ethyl-3-butylimidazole bis(fluoromethanesulfonyl)imide salt, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bis(trifluoromethanesulfonyl)imide, divinylbenzene, and benzoin ethyl ether, coating the mixture, and curing the mixture to produce an imidazole ionic liquid polymer electrolyte membrane. The imidazole ionic liquid polymer electrolyte membrane achieves a triple functional integration of "rigid skeleton, flexible transmission, and interface stability," significantly improving its electrical and mechanical properties.

The invention relates to an ionic composite hydrate accelerant for carbon sequestration, which comprises amino acid salt: sodium glycinate NaGly, a surfactant: octyl glucoside OGP, a thermodynamic accelerant: tetrabutylammonium bromide TBAB and a dynamic accelerant: lauryl sodium sulfate SDS, and after the four components are mixed with water, the mass percent concentration of NaGly (0.001-1wt%) + OGP (0.001-1wt%) + SDS (0.001-1wt%) + TBAB (5-50wt%) is obtained. NaGly, OGP, TBAB and SDS are combined according to the proportion to form the ionic composite hydrate accelerant, the generation speed of hydrate is remarkably increased through cooperation of the four components, the generation time is shortened, and the sealing efficiency of carbon dioxide is effectively improved.

The present invention relates to a method for synthesizing tetracaine, comprising the steps of: using N-Boc-4-aminobenzoic acid (A) as a raw material, and reacting with n-butyl bromide to obtain N-Boc-N-butyl-4-aminobenzoic acid butyl ester (B); removing Boc from N-Boc-N-butyl-4-aminobenzoic acid butyl ester (B) under weak acid to obtain N-butyl-4-aminobenzoic acid butyl ester (C); and reacting N-butyl-4-aminobenzoic acid butyl ester (C) with N,N-dimethylethanolamine to obtain tetracaine (I). This method effectively reduces the risk of generating N-disubstituted butyl impurities, does not require palladium-carbon hydrogenation, and the purity and yield of the prepared tetracaine are both high, the product purity is greater than 99.8%, and the single impurity is less than 0.05%, which meets the requirements of medicinal raw materials.

The invention discloses a modifier of a PA66 composite material, a preparation method of the modifier, the PA66 composite material and a preparation method of the PA66 composite material. The preparation method of the modifier of the PA66 composite material comprises the following steps: preparing a macromolecular functional connecting agent Epoxy-PSi-PBI-NH2; the preparation method comprises the following steps: preparing CNT-PSi-PBI-Epoxy; the CNT-PSi-PBI-Epoxy and the hydroxylated BF are added into tetrabutylammonium bromide, and the mixture is stirred for a reaction; and filtering the reaction solution, washing, and drying the filter cake in a vacuum drying oven to obtain the modifier BF-PSi-PBI-CNT of the PA66 composite material. According to the invention, the dispersibility of the BF-CNT in the PA66 matrix can be synchronously solved, the interface combination of the BF-CNT, the PA66 matrix and the matrix can be optimized, the synergistic enhancement of mechanics and functions (electric conduction / heat conduction) can be realized, and the mechanical property, the heat conduction property and the electric conduction property can be simultaneously improved.

The invention discloses a preparation method of perfluorobutyl sulfonamide, and belongs to the technical field of synthesis of perfluorobutyl sulfonamide. The preparation method comprises the following steps: adding a choline chloride-urea eutectic solvent, ammonium carbamate, triethylamine, tetrabutylammonium bromide, allyl (cyclopentadienyl) nickel and potassium carbonate into a reaction kettle, uniformly stirring, dropwise adding perfluorobutanesulfonyl chloride into the reaction kettle under constant-temperature heating, and heating to 70-75 DEG C after dropwise adding to continue reaction; and after the reaction is finished, cooling the reaction liquid to room temperature, adding water into the reaction liquid, stirring and dissolving, adjusting the pH value of the system to 7, extracting and separating out an organic phase, washing the organic phase, carrying out rotary evaporation, recrystallizing, and drying to obtain the perfluorobutyl sulfonamide. According to the method disclosed by the invention, the nucleophilic substitution reaction rate of the perfluorobutyl sulfonyl chloride and the ammonium carbamate can be remarkably increased, the yield and the purity of the perfluorobutyl sulfonamide are improved, and the environmental pollution is reduced.

The invention provides a synthesis method of etifoxacin, and relates to the technical field of organic synthesis, and the synthesis method comprises the following steps: adding triphenylmethyl phosphorus bromide into a solvent, adding potassium tert-butoxide at 0-5 DEG C to obtain a suspension, preparing a 2-aminobenzophenone solution, reacting the suspension at room temperature for 30-40 minutes, adding the 2-aminobenzophenone solution into the suspension, and reacting for 30-40 minutes at room temperature to obtain the etifoxacin. Completely reacting to obtain a compound 2; dissolving the compound 2 in dichloromethane, dropwise adding ethyl isocyanate, heating to room temperature, and reacting to obtain a compound 3; mixing the compound 3, Selectfluor and a compound A, adding acetonitrile, and reacting at room temperature for 60-70 minutes to obtain a compound 4; and reacting the compound 4 and sodium borohydride in ultra-dry dimethyl sulfoxide at room temperature under the protection of nitrogen to obtain etifusin. The compound A is selected from any one of potassium iodide, Selectfluor, tetrabutylammonium chloride and tetrabutylammonium bromide. According to the invention, synthesis of etifusin is realized by a metal-free catalysis and green chemical method, and the yield is high.

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 preparation method of a fluralan N-1 intermediate, which comprises the following steps: S1, carrying out aldol reaction on 4-acetyl-2-methyl benzoic acid and 3 ', 5'-dichloro-2, 2, 2-trifluoroacetophenone under the action of alkali to obtain an intermediate 1; s2, dehydrating the intermediate 1, washing a mixed product obtained by reaction with diluted hydrochloric acid under a heating condition in a post-treatment process, and directly carrying out next-step reaction on a collected organic phase; and S3, adding the organic phase obtained in the step S2 into a mixed catalytic system of tetrabutylammonium bromide and 18-crown ether-6, and carrying out an intramolecular nucleophilic addition reaction to obtain the fluralan N-1 intermediate. According to the method, a second process route of the fluralana N-1 intermediate is optimized, the yield is increased, the cost is reduced, the process steps are reduced, and the method is a process route which is environmentally friendly, safe, economical, low in production cost and capable of achieving industrial production and has a very good prospect.

The present invention relates to a rhamnamide derivative containing coumarin thiazole and also relates to a synthesis method of the derivative. The method specifically comprises the following steps: firstly reacting rhamnamide, tetrabutylammonium bromide, anhydrous potassium carbonate and dimethyl carbonate to generate 1,3,8-trimethoxy-6-methylanthracene-9,10-dione; then reacting 1,3,8-trimethoxy-6-methylanthracene-9,10-dione with tetrabutylammonium permanganate to generate 4,5,7-trimethoxy-9,10-dicarbonyl-9,10-dihydroanthracene-2-carboxylic acid; and finally reacting with substituted 3-(2-aminothiazol-4-yl)coumarin to generate 4,5,7-trimethoxy-N-(4-(coumarin-3-yl)thiazol-2-yl)-9,10-dicarbonyl-9,10-dihydroanthracene-2-carboxamide. The raw materials of the invention are readily available, the reaction conditions are mild, the synthesis method is simple and safe to operate, the environmental pollution is small, the yield is high, and the post-processing is convenient. The synthesized compounds have a certain inhibitory effect on Vibrio harveyi.

The present invention relates to the technical field of oil and gas recovery, and discloses an oil and gas processing method. An oil and gas processing method, the method comprising: (1) sequentially subjecting the oil and gas to primary condensation and secondary condensation; (2) absorbing the gaseous product obtained in step (1) using a low eutectic solvent; wherein the low eutectic solvent contains at least one pair of hydrogen bond acceptor-hydrogen bond donor, the hydrogen bond acceptor being selected from one or more of choline chloride, tetrabutylammonium bromide, tetraoctylammonium chloride, menthol and thymol, and the hydrogen bond donor being an organic acid; wherein the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1:0.1 to 10. In this method, the oil and gas mixture first undergoes secondary self-cascade condensation to recover the components with higher boiling points in the oil and gas; after condensation, the mixture enters the absorption system. Since the low eutectic solvent is used as the absorbent, the solvent loss caused by the volatilization of the absorbent can be avoided, thereby achieving deep recovery of VOCs.

The invention discloses halogen-free flame-retardant nylon. The halogen-free flame-retardant nylon is prepared from the following raw materials: matrix resin, a heat-resistant agent, a flame retardant and a functional auxiliary agent, the heat-resistant agent is functionalized nano boron fiber, and the raw materials of the functionalized nano boron fiber comprise nano boron fiber, trichloromethylsilane and black phosphorus nanosheets; the flame retardant is gradient type hyperbranched polyol, and the hyperbranched polyol is prepared from the following raw materials: trimethylolpropane, diphenyl phosphate, epoxy chloropropane, glycidyl stearate and tetrabutylammonium bromide. The invention provides halogen-free flame-retardant nylon as well as a preparation method and application thereof. The flame retardant property, the mechanical property and the upper limit of heat resistance of the halogen-free flame-retardant nylon can be improved.

The invention relates to an anticorrosive metal primer and a preparation method thereof, and belongs to the technical field of paints.The component A of the primer comprises modified alloy powder, a Schiff base cobalt complex, barium sulfate, boron nitride, modified resin, a polycyclic carbonate diluent and the like; and the component B comprises a curing agent and an interface anchoring accelerator. The modified alloy powder is prepared by sintering Fe, Cr, Ni, Mo and W metal powder and carrying out surface modification through a titanate coupling agent. The Schiff base cobalt complex is prepared by compounding a Schiff base ligand and cobalt acetate. The modified resin is prepared from bisphenol S epoxy resin, epoxy propoxy propyl terminated polydimethylsiloxane, 3-(2, 2, 3, 3-tetrafluoropropoxy)-1, 2-propylene oxide, tetrabutylphosphonium bromide, 3-(trihydroxysilyl) propyl methyl phosphate, a poly cyclic carbonate diluent and propylene glycol monomethyl ether. The preparation method comprises the following steps: preparing the modified resin from bisphenol S epoxy resin, epoxy propoxy propyl terminated polydimethylsiloxane, 3-(2, 2, 3, 3-tetrafluoropropoxy)-1, 2-propylene oxide, tetrabutylphosphonium bromide, 3-(trihydroxysilyl) propyl methyl phosphate, a polycyclic carbonate diluent and propylene glycol monomethyl ether. The primer provided by the invention realizes the comprehensive performance of low-temperature rapid curing, high construction tolerance and wide temperature range environment tolerance.

The invention relates to the technical field of thioamide preparation, in particular to a method for preparing thioamide from quaternary ammonium salt. An oxidizing agent, an alkaline material, a sulfur source, quaternary ammonium salt as shown in a formula 1 and an N, N-dimethylformamide solvent are subjected to a synthetic reaction, and a thioamide compound as shown in a formula 2 is obtained; wherein the structural formula of the quaternary ammonium salt is as shown in the formula 1, and in the formula 1, R1 groups comprise at least one of hydrogen, methyl, methoxyl, chlorine, trifluoromethyl, tertiary butyl, bromo and phenyl; the structural formula of the thioamide compound is shown in the formula 2, and in the formula 2, R2 groups comprise at least one of hydrogen, methyl, methoxyl, chlorine, trifluoromethyl, tertiary butyl, bromo and phenyl. The method has the advantages of being wide in raw material source, simple and convenient in reaction operation, wide in reaction universality and high in reaction process selectivity. In addition, compared with a traditional thioamide synthesis method, the method has the advantage that the environmental protection property and the substrate universality are obviously improved.

A cold storage material composition contains tetra-n-butylammonium bromide, water, and 1-propanol. The weight ratio of tetra-n-butylammonium bromide to water is greater than or equal to 32.5 / 67.5 and less than or equal to 42.5 / 57.5. The molar ratio of 1-propanol to water is greater than or equal to 0.02 and less than or equal to 0.042. The cold storage material composition has a fusion heat of greater than or equal to 135 J / g within a range of higher than or equal to 5 degrees Celsius and lower than or equal to 12 degrees Celsius and has a heat flow peak within a range of higher than or equal to 5 degrees Celsius and lower than or equal to 12 degrees Celsius.

The invention relates to a novel process for synthesizing gamma-mercaptopropyl triethoxy silane by a water phase method, which comprises the following steps: sequentially adding deionized water, sodium chloride, sodium hydrosulfide, potassium iodide, sodium carbonate, tetrabutylammonium bromide and cetyltrimethylammonium bromide into a reaction container, dropwise adding 3-chloropropyl triethoxy silane into the reaction container, keeping the temperature at 50-55 DEG C, reacting for 1-2 hours, filtering, washing and drying to obtain the gamma-mercaptopropyl triethoxy silane. The method comprises the following steps: adding 3-chloropropyltriethoxysilane into a reaction solution, reacting for 50-75 minutes, monitoring the reaction process through gas chromatography until the residual 3-chloropropyltriethoxysilane in the reaction solution is less than 0.5%, completing the reaction, cooling to room temperature, standing for 10-20 minutes until two phases are layered, washing and drying the organic phase, and carrying out reduced pressure distillation on the organic reagent to obtain gamma-mercaptopropyltriethoxysilane. Compared with the existing aqueous phase synthesis process, the method provided by the invention has the advantages that the mass transfer efficiency of the reaction can be remarkably improved, so that the reaction time is shortened, the yield is improved, the generation of by-products such as ethanol is effectively reduced, and meanwhile, the method is relatively light in smell in the reaction process, simple and convenient in process and easy to realize large-scale industrial production.