18 results about "Tetramethylammonium bromide" patented technology

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a process for mass production of Ti-Beta zeolite based on local structure reconstruction method. The main technical features include: using water vapor assisted tetraethylammonium bromide template agent and alcohol amine weak organic base, and preparing Ti-Beta zeolite by local desilicon etching and repair reconstruction on the hydroxyl pit of dealuminated Beta zeolite. The benefits of the present application include: the combination of tetraethylammonium bromide template agent and alcohol amine weak organic base, and the limitation of the amount of silicate dissolved by the channel condensate liquid generated by dealuminated Beta zeolite and the liquid film on the surface of zeolite solid in saturated steam, which makes it easier to control the etching desilicon of the hydroxyl pit of dealuminated Beta zeolite and improves the receiving capacity of the hydroxyl pit to titanium ions with larger volume. The local structure defects generated by controllable etching desilicon can be directly repaired by using the quaternary ammonium cation provided by the TEABr template agent as a directing agent, so that the present application does not need to be assisted by fluoride or / and aluminum source.

The invention relates to a preparation method and application of a sulfur vacancy regional distribution MoS2 catalyst. The preparation method comprises the following steps: uniformly stirring a molybdenum source and a sulfur source in deionized water to form a precursor mixed solution; directly adding tetramethylammonium bromide into the mixed solution, and uniformly stirring to obtain the mixed solution; when the stirring time is 5-30 min, the MoS2 catalyst with the dominant in-plane sulfur vacancy is synthesized; when the stirring time is more than 60-360 minutes, synthesizing a MoS2 catalyst with dominant edge sulfur vacancy; and then reacting, washing, drying and annealing to obtain the catalyst. The catalyst is used for preparing alcohol or alkane through palmitic acid hydrodeoxygenation. The palmitic acid is subjected to full-chain hydrodeoxygenation to obtain hexadecane, and the product selectivity reaches 99%. MoS2 (E)-A dominated by edge sulfur vacancies accurately controls selective partial hydrodeoxygenation to generate hexadecanol, the selectivity reaches up to 80%, and generation of by-products due to excessive hydrogenation is avoided. And the preparation requirements of on-demand products of alkanes / alcohols are met.

The present invention discloses an alkaline zinc-bromine flow battery, belonging to the technical field of flow batteries. The alkaline zinc-bromine flow battery of the present invention mainly includes a positive electrode, a separator, a negative electrode and an electrolyte. The positive and negative electrolytes include ZnBr2, an alkali and a complexing agent. The complexing agent is one or more of tetramethylammonium bromide, tetraethylammonium bromide, tetrapropylammonium bromide, and tetrabutylammonium bromide. The positive electrode of the battery undergoes a bromine redox reaction, and the negative electrode undergoes a deposition and dissolution reaction of metallic zinc. The complexing agent in the electrolyte can complex the bromine into a solid complex, thereby inhibiting the disproportionation reaction of bromine in the alkaline zinc-bromine flow battery. The electrolyte of the present invention is easy to prepare and does not require the positive and negative electrodes to be prepared separately. By complexing the bromine generated during the charging process into a solid state, the disproportionation of bromine is reduced, the battery performance is improved, and the battery self-discharge is reduced. The electrolyte has broad application prospects.

An electrolyte of a static zinc-based battery, includes a) zinc bromide in molar concentration from 1.5M to 3.0M, b) tetraethylammonium bromide as a bromine complexing agent in half of the molar concentration of the zinc bromide, c) a glycol based anti-freezing agent in molar concentration from 1.0M to 2.0M, d) zinc chloride as supporting ionic conducting agent in molar concentration from 1.0M to 4.0M, and e) an additional supporting ionic conducting agent in molar concentration from about 2.0M to 4.0M. The electrolyte minimizes the self-discharge of the static zinc-based battery and improves the energy density of the static zinc-based battery.

The present application relates to the technical field of synthesis of 4,4'-diaminobenzene sulfonanilide, and provides a synthesis method of 4,4'-diaminobenzene sulfonanilide with high yield, S1, p-acetylamino benzene sulfonyl chloride and p-phenylenediamine are mixed, the pH is adjusted to 7.5-8.0, under the action of a catalyst, an amide reaction is performed to obtain a mixture; S2, the mixture is added to an alkaline solution, after hydrolysis, decolorization, filtration, the pH is adjusted to 7.5-8.0, and filtration is performed to obtain 4,4'-diaminobenzene sulfonanilide; in step S2, the catalyst comprises tetrabutylammonium bromide and a catalytic aid in a mass ratio of 4:1-1.5, and the catalytic aid comprises tetraethylammonium bromide and phenyltrimethylammonium bromide in a mass ratio of 5:0.5-1. Through the technical scheme, the problem of low yield of 4,4'-diaminobenzene sulfonanilide in the related art is solved.

This invention belongs to the field of photoelectrochemical energy storage technology, specifically relating to a bromine-modified iron-bromine photoelectrochemical redox flow battery and its preparation method. The battery device of this invention comprises an anode cell, a PBVO electrode as the anode, a cathode cell, a graphite carbon felt electrode as the cathode, and a proton exchange membrane. A proton exchange membrane is fixed between the anode and cathode cells using a metal clamp. The anode cell contains a KBr solution containing tetraethylammonium bromide (TEAB) as the anolyte, and the cathode cell contains a FeCl3 solution as the cathode electrolyte. A light source illumination window is provided at the corresponding position of the anode, with backlighting. The anode includes conductive glass and a semiconductor thin film thereon. The anode is connected to the positive terminal of the power supply via a current collector, and the cathode is connected to the negative terminal of the power supply via a current collector. Compared with traditional systems, this invention's device has higher coulombic efficiency, and the charge / discharge mode can be switched by changing the photoanode, making it applicable to the field of photoelectrochemical redox flow batteries.

An electrolyte (102) of a zinc-bromine static battery (104), comprising zinc bromide in molar concentration from 1.5 to 3.0 M; a mixture of two or more quaternary ammonium salts in 30 to 55 % of the molar concentration of the ZnBr2; a glycol based anti-freezing agent in molar concentration 0.1 to 2.0 M; and one or more additional supporting ionic conducting agents selected from zinc chloride, potassium chloride, magnesium chloride, lithium chloride and calcium chloride, where each or the combination are present in a molar concentration 0.5 to 2 M. The ammonium salts may be selected from tetrapropylammonium bromide (TPAB) or chloride or tetrabutylammonium bromide (TBAB) or chloride along with tetraethylammonium bromide (TEAB) or chloride. The anti-freezing agent may be selected from monoethylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol 200, polyethylene glycol 400, or a combination thereof. The electrolyte may be free of pH maintaining agents and buffering agents.

The invention relates to the field of wire materials, in particular to a halogen-free flame-retardant B1-level fire-resistant wire and a preparation method thereof. The modified polyethylene resin is obtained by adding polyethylene, a hydrogen peroxide solution and a formic acid solution. And then adding olefin phosphaphenanthrene, trimethylolpropane-tri (3-mercaptopropionate), a mercapto branched unit, epoxy chloropropane, sodium hydroxide and tetramethylammonium bromide, and reacting to obtain the flame-retardant hyperbranched epoxy resin. The preparation method comprises the following steps: adding modified polyethylene resin, flame-retardant hyperbranched epoxy resin, a curing agent, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, a lubricant and an antioxidant, carrying out a blending reaction, and then carrying out extrusion granulation and melt extrusion to obtain the insulating protective sleeve. And wrapping the copper core wire with the insulating protective sleeve to obtain a finished product. The prepared insulating protective sleeve has good mechanical property, flame retardant property and thermal safety performance, so that the insulating protective sleeve has a wide application prospect in the field of electric wire materials.

The application discloses a preparation method of a BiOBr-Bi2O2SO4 heterojunction photocatalyst for CO2 reduction and application thereof. The preparation method comprises the following steps: first, Bi2O2SO4 is prepared; second, the heterojunction is constructed. Thiocyanic acid and bismuth nitrate hydrate are used as raw materials to synthesize the photocatalyst Bi2O2SO4, and the substrate is modified in situ by using tetraethylammonium bromide as a material, so that the BiOBr-Bi2O2SO4 heterojunction is finally obtained. The materials used in the application are cheap and easy to purchase, and the economic cost is low. The photocatalyst prepared by the method has the advantages of high selectivity, high light absorption efficiency, large material surface area and high stability, and is a relatively ideal photocatalyst for CO2 photoreduction.

The present invention discloses a modified montmorillonite adsorbent for the combined removal of lead, chromium, and cadmium in flue gas, and its preparation method and application. The preparation method comprises: dissolving montmorillonite in water, adding a sodiumizing agent, heating and stirring, and obtaining sodium-based montmorillonite; mixing the sodium-based montmorillonite with tetramethylammonium bromide and then mechanically grinding it to obtain tetramethylammonium bromide intercalation-stripping sodium-based montmorillonite; fully swelling the tetramethylammonium bromide intercalation-stripping sodium-based montmorillonite in water, adding an aged iron pillaring agent, vigorously stirring under ultrasonication, drying, and calcining to obtain the modified montmorillonite adsorbent. The modified montmorillonite adsorbent obtained by the present invention can effectively adsorb lead, chromium, and cadmium in industrial flue gas, has the advantages of high combined removal efficiency, large adsorption capacity, good resistance to SO2, HCl, and water vapor poisoning, good anti-sintering performance, and is easy to separate and recycle. The preparation method is simple and reliable, low cost, and easy to industrialize.

The invention discloses a novel molecular sieve carrier, a catalyst based on the carrier as well as a preparation method and application of the catalyst. The preparation method of the novel molecular sieve carrier comprises the following steps: (1) mixing attapulgite subjected to acid treatment with sodium aluminate, tetraethylammonium bromide, sodium hydroxide and deionized water, carrying out stirring treatment, carrying out hydrothermal reaction, carrying out suction filtration, washing and drying, and finally carrying out calcination treatment in an air atmosphere to obtain an AMOR molecular sieve; (2) performing acid treatment on the AMOR molecular sieve in acid liquor; and (3) placing the AMOR-H molecular sieve subjected to acid treatment in alkali liquor for alkali treatment to obtain the novel AMOR-H / OH molecular sieve carrier. The catalyst is applied to catalysis of CH4-CO2 reforming for synthesis gas preparation, the high methane / carbon dioxide conversion rate is achieved and exceeds 80%, and the H2 / CO ratio in the synthesis gas is 0.8-1.2. The use of the AMOR-H / OH molecular sieve carrier improves the dispersibility of nickel, the anchoring effect of Si-OH makes the active metal more stable, and the catalyst has a good anti-sintering effect, thereby effectively prolonging the service life of the catalyst.

The invention relates to a preparation method of a zinc isomorphous replacement modified nano [Zn / Al] ZSM-12 molecular sieve, and aims to solve the problems that the acidity of the existing ZSM-12 molecular sieve is too strong, so that side reactions such as cracking in an acid catalytic reaction process are aggravated, and coking and carbon deposition are easy to occur. The preparation method comprises the following steps: 1, mixing silica sol serving as a silicon source, sodium metaaluminate serving as an aluminum source, sodium hydroxide serving as an alkali source and tetraethylammonium bromide serving as a template agent with water to form initial gel, and performing crystallization reaction at the temperature of 150-158 DEG C to synthesize a ZSM-12 molecular sieve; and 2, mixing the ZSM-12 molecular sieve with an ammonium fluorozincate aqueous solution, carrying out heating treatment at 60-90 DEG C, and carrying out roasting treatment on the collected solid-phase substance to obtain the zinc isomorphous replacement modified nano [Zn / Al] ZSM-12 molecular sieve. The preparation method provided by the invention is simple and easy to implement, realizes fine modulation of acidity and pore characteristics of the molecular sieve at the same time, and has universality for other molecular sieves.

The invention discloses a preparation method of nanoscale H-ZSM-5 with a low silica-alumina ratio and an application of the nanoscale H-ZSM-5. Comprising the following steps: (1) mixing a silicon source with water to obtain a solution A; (2) mixing an aluminum source with water to obtain a solution B; (3) mixing tetraethylammonium bromide with water to obtain a solution C; and (4) adding the solution B into the solution A, then adding the solution C, stirring, crystallizing, separating, washing, drying and roasting to obtain the nanoscale H-ZSM-5 with the low silica-alumina ratio, the silica-alumina ratio is 32-60, the raw materials are cheap, the use amount of the organic template agent is small, the synthesis time is short, the yield is high, the product morphology is nanocrystalline, and the nanoscale H-ZSM-5 has a good application prospect in the fields of petrochemical engineering and fine chemical engineering.

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a Ti-Beta zeolite preparation process based on a gas phase transmission method and a reusable organic base. Main technical features include: providing water vapor and a weak organic base auxiliary tetraethylammonium bromide template by gas phase transmission, and preparing Ti-Beta zeolite by in-situ local desilicon etching and repair and reconstruction of the hydroxyl pit of the dealuminized Beta zeolite. Benefits include: the combination of the tetraethylammonium bromide template and the volatile weak organic base, and the limitation of the amount of dissolved silicate by the channel condensate liquid generated by the dealuminized Beta zeolite and the liquid film on the zeolite solid surface in the saturated steam, which makes the controllable etching desilicon of the hydroxyl pit of the dealuminized Beta zeolite and the improvement of the receiving capacity of the hydroxyl pit to the relatively large titanium ions easier. The local structural defects generated by the controllable etching desilicon can be directly repaired by the quaternary ammonium cations provided by the TEABr template, so that the present application does not need fluoride or / and aluminum source auxiliary.

The invention belongs to the technical field of chemical pharmacy, and relates to a preparation method of a tenofovir intermediate R-(+)-9-(2-hydroxypropyl) adenine, adenine and R-propylene oxide are used as raw materials, tetraethylammonium bromide is used as a catalyst, under the action of sodium hydroxide, a ring-opening condensation reaction is carried out, and the tenofovir intermediate R-(+)-9-(2-hydroxypropyl) adenine is obtained. And the tenofovir intermediate R-(+)-9-(2-hydroxypropyl) adenine is generated. According to the preparation method of the tenofovir intermediate R-(+)-9-(2-hydroxypropyl) adenine, provided by the invention, the content of isomer impurities is greatly reduced, and the yield of a finished product is improved.

The present invention discloses a hot air preparation method for a highly breathable and high-strength polylactic acid composite non-woven fabric, which belongs to the technical field of polylactic acid material preparation. The method comprises: stirring and dissolving polylactic acid in dimethylformamide, adding potassium persulfate and sodium bisulfite; adding ethyl acrylate and butyl acrylate, and adding thioglycolic acid for reaction; adding trimethylolpropane triacrylate, adding triethylamine, and continuing the reaction; separating to obtain grafted polylactic acid; dissolving the grafted polylactic acid in acetone, adding tetraethylammonium bromide for dissolution, slowly adding a dilute sulfuric acid solution dropwise, and reacting; cooling and separating to obtain modified polylactic acid; mixing the modified polylactic acid, polycaprolactone, and an auxiliary agent, melt-spinning into fibers, weaving, laying a net, and needle-punching; and hot air combing. The present invention adopts a specific modification reagent and method to prepare modified polylactic acid fibers, and adopts the modified polylactic acid fibers in combination with specific hot air non-woven fabric preparation steps and parameters to prepare highly breathable and high-strength polylactic acid composite non-woven fabrics.

This invention provides a method for preparing and applying an inorganic-organic mixed ammonium modified sandwich-type dinuclear uranium-tungsten-antimonate visible light photocatalyst. Belonging to the field of catalyst technology, the method for preparing an inorganic-organic mixed ammonium modified sandwich-type dinuclear uranium-tungsten-antimonate visible light photocatalyst includes the following steps: sodium tungstate dihydrate, ammonium chloride, tetramethylammonium bromide, antimony trichloride, and uranyl nitrate hexahydrate are sequentially added to a 100 mL beaker; 30-100 mL of deionized water is added to the beaker, and then... (The sentence is incomplete and requires further context to translate accurately.) ‑1 Adjust the pH of the solution with HCl solution to pH 2-5; after stirring the reaction solution in step S2 evenly, place it in a water bath and heat it at 60-100℃ for 3 hours; after taking out the reaction solution in step S3 and cooling it to room temperature, filter it and evaporate the filtrate in the open at room temperature.

The invention discloses a corrosion-resistant direct-current charging pile connecting cable and a preparation method thereof, belongs to the technical field of cable preparation, and is used for solving the technical problem that the corrosion resistance and ultraviolet resistance of a charging pile connecting cable need to be further improved in the prior art. And the corrosion-resistant layer is obtained by coating the exterior of the cable base body with a powder coating and then carrying out thermocuring. According to the invention, 4, 4 '-bis (methoxymethyl) biphenyl and 4-allylphenol are condensed to obtain an intermediate I, and the intermediate I is grafted by epoxy chloropropane and subjected to a substitution reaction with participation of tetramethylammonium bromide and sodium hydroxide to form modified epoxy resin containing rich epoxy groups and an allyl structure, so that the corrosion resistance of a connecting cable is improved, and the service life of the connecting cable is prolonged. The ultraviolet resistance and the mechanical property are also improved.