22 results about "Tetramethylammonium" patented technology

The invention belongs to the technical field of gas separation, and particularly relates to application of a tetramethylammonium-modified EMT zeolite molecular sieve in CH4 / N2 adsorption separation. According to the invention, tetramethylammonium ions (TMA < + >) are introduced into the zeolite molecular sieve EMT, so that the EMT which has no performance originally shows efficient CH4 / N2 separation performance. Due to the introduction of TMA, the SBET value of the EMT molecular sieve is obviously reduced compared with that of the original EMT molecular sieve, but the adsorption capacity of methane is increased. Due to the introduction of TMA, the interaction affinity of CH4 and a zeolite framework is enhanced. Under the conditions that the K is 298 K, the pressure is 1 bar and the pressure is 10 bar, the EMT-TMA shows relatively high CH4 / N2 selectivity of 5.43 and 7.48.

The invention belongs to the technical field of organic synthetic chemistry, and particularly relates to a preparation method and medical application of a visible-light-driven bis (trifluoromethyl) selenide compound. The preparation method of the bis (trifluoromethyl) selenide compound comprises the following steps: by taking olefin, trifluoromethylselenotetramethylammonium and bis (trifluoromethylseleno) diselenide as reaction raw materials, stirring and reacting under the conditions of proper temperature and visible light irradiation in the presence of cuprous salt to obtain the bis (trifluoromethyl) selenide compound. The method has the advantages of mild reaction conditions, simplicity and convenience in operation, good functional group compatibility and the like. In addition, the bis (trifluoromethyl) selenide compound provided by the invention shows good potential in the aspect of anticonvulsion, and has the prospect of being further developed into anticonvulsion drugs.

The invention discloses a washable flame-retardant textile and a preparation method thereof, and belongs to the technical field of functional textile production. According to the invention, tetrakis hydroxymethyl phosphonium sulfate, urea, a compound containing amino acid and water are used as a flame retardant system to treat the textile. Wherein hydroxymethyl in the tetrakis (hydroxymethyl) phosphonium sulfate reacts with amino in the urea to form a tetrakis (hydroxymethyl) phosphonium sulfate-urea prepolymer; carrying out self polycondensation on the tetrakis hydroxymethyl phosphonium sulfate-urea prepolymer, and meanwhile, further reacting residual unreacted hydroxymethyl in the tetrakis hydroxymethyl phosphonium sulfate with hydroxyl in fibers in the textile to form a water-insoluble cross-linked polymer; an amino acid-containing compound (such as non-toxic and harmless biomass bone glue) is adopted for reaction, and amino in the amino acid-containing compound reacts with hydroxymethyl. Finally, the flame-retardant textile is good in flame-retardant effect and washable, and environmental pollution, potential safety hazards and the like are effectively prevented.

The application discloses a preparation method of a water-based developing solution, the water-based developing solution and application thereof, and belongs to the technical field of developing solutions. The preparation method comprises the following steps: a first amount of sulfuric acid is mixed with a second amount of isopropyl alcohol to obtain an isopropyl alcohol solution; tetramethylammonium chloride is mixed with the isopropyl alcohol solution according to a first preset proportion, a third amount of sulfuric acid is added, and the precipitate is filtered and dried to obtain white crystalline solid tetramethylammonium sulfate; the solid tetramethylammonium sulfate is dissolved in water, a suspension of barium hydroxide is added to the water, the reaction mixture is filtered, a tetramethylammonium hydroxide solution is obtained and purified; and the purified tetramethylammonium hydroxide solution is mixed with water according to a second preset proportion, and stirring is performed to obtain the water-based developing solution. The application aims to provide a water-based developing solution to solve the problem that the conventional developing solution in the form of an organic solvent is inconvenient to use in a chip developing process.

The invention relates to a uniform dyeing and high-color-fixation piece dyeing process suitable for various fabrics. The fabric is prepared by the following method: pretreatment: pretreating a whole costume blank of various fabrics to obtain a pretreated blank; dyeing: immersing the pretreated blank in a dyeing solution, and dyeing to obtain dyed gray cloth; post-treatment: sequentially carrying out color fixation, soaping and hot drying on the dyed gray cloth to obtain dyed clothes; the effective components of the dye liquor comprise a reactive dye, a weak acid dye, sulfate, a level dyeing color fixing agent and an acid material; the leveling color fixing agent is composed of a leveling activator, tetramethyl ammonium polyhedral oligomeric silsesquioxane and sulfonated modified cellulose nanocrystals, and the leveling activator is composed of multiple of N, N '-(1, 2-ethanediyl) diaspartic acid, sucrose octasulfate sodium, fatty alcohol-polyoxyethylene ether and polyethylene glycol monooleic acid phosphate. By means of the process, better evenly-dyed and high-color-fixation piece-dyed clothes can be efficiently obtained.

The invention discloses a PCR (Polymerase Chain Reaction) buffer solution, a kit, a fully premixed storage solution and application. The PCR buffer solution comprises the following components: a buffer agent, potassium salt, magnesium salt, ammonium sulfate, dNTP (T), dNTP (U), Triton X-100, dimethyl sulfoxide, tetramethylammonium chloride, glycerol, dithiothreitol and bovine serum albumin. According to the PCR buffer solution provided by the invention, the amplification efficiency of a high-GC-content template is remarkably improved through a synergistic effect generated by all the components in a specific ratio, the premixing performance is effectively enhanced, and the reagent stability after the PCR buffer solution is premixed with enzyme, primers and probes is remarkably improved.

The invention belongs to the technical field of material synthesis, and particularly relates to bis (tetramethylammonium dodecahydrododecaborate) as well as a synthesis method and application thereof. According to the synthesis method of the dodecahydrododecaborate bis (tetramethylammonium), expensive and difficult-to-obtain raw materials are not used, the dodecahydrododecaborate bis (tetramethylammonium) is synthesized through one-step reaction of tetramethyl ammonium borohydride (CH3) 4NBH4 and the borane dimethyl sulfide complex in the high-pressure reaction kettle, the reaction steps are simple, the yield is high, and the method is suitable for industrial production. According to the present invention, the dodecahydrododecaboronic acid bis (tetramethyl) ammonium synthesis process has characteristics of high yield and high purity, is an efficient dodecahydrododecaboronic acid bis (tetramethyl) ammonium synthesis process, is hopeful to provide the high-purity dodecahydrododecaboronic acid bis (tetramethyl) ammonium on a large scale, meets the application requirements of dodecahydrododecaboronic acid bis (tetramethyl) ammonium in a plurality of fields, and has wide application prospects. Therefore, the technical problem that an efficient synthesis process for dodecahydrododecaboronic acid bis (tetramethylammonium) is lacked at present is solved.

A formulation comprising an isothiocyanate (ITC) with a sulfoxide moiety and a combination of at least two of the following compounds: - organic acids, - amino acids, - ectoine and 5-hydroxyectoine, - compounds comprising a tetramethyl ammonium moiety, - phenols, - glycols, - glycerol, - sugar alcohols, - simple saccharides, - terpenoids, - chaotropic agents, wherein the above-mentioned compounds may be mixed in any combination with the selected isothiocyanate. Products comprising said formulation. A method of preparing said formulation. A method of stabilizing isothiocyanate in said formulation.

Provided herein is a small crystal size aluminosilicate zeolite having an intergrowth structure of a SBS framework structure and a SBT framework structure, designated as SSZ-133. The aluminosilicate zeolite may be synthesized by (a) preparing a synthesis mixture comprising a source of alumina, a source of silica, an organic template containing a tetramethylammonium cation, a source of hydroxide ions, a source of cesium cation, and water; (b) heating the synthesis mixture under crystallization conditions including a temperature of from 50° C. to 150° C. for a time sufficient to form crystals of the zeolite; and (c) recovering at least a portion of the zeolite from step (b). The source of alumina is free of, essentially free of, or substantially free of an aluminum alkoxide and the source of silica is free of, essentially free of, or substantially free of colloidal silica.

The application discloses a kind of nano self-assembly Y type molecular sieve and its preparation method and application.The nano self-assembly molecular sieve is the aggregate formed by nano crystalline grain cluster, and the size of nano crystalline grain is 40-100 nm;Aggregate size is 1.3 μm-3.5 μm;Skeleton silicon aluminum ratio (SiO­2 / Al­2O3) is 8.0-13.0.The preparation method of the nano self-assembly Y type molecular sieve, the method comprises the following steps: (1) the mixture material containing alkali source, sodium source, aluminum source, tetramethylammonium template agent, cationic surfactant, silicon source is obtained by aging, crystallization after crystallization material;(2) after crystallization material is mixed with tetramethylammonium fluoride (TMA) F, silicon source and water, after crystallization, washing, filtration, drying is prepared final nano self-assembly Y type molecular sieve.The molecular sieve has higher crystallinity, higher skeleton silicon aluminum ratio, higher external specific surface area, and good stability in high-temperature hydrothermal environment and acidic environment.

To provide a cured material having excellent adhesion to metals even when brought into repeated contact several times with a chemical solution including an organic solvent, a basic compound, or the like, a laminated body comprising the cured material, and a semiconductor device comprising the cured material.SOLUTION: Provided are a cured material comprising a resin A having a repeating unit represented by the following formula (A-1) and an antioxidant, which shows a residual film ratio of 70% or more when immersed for 1 hour in a mixed solution of dimethyl sulfoxide:2.38 mass% aqueous tetramethylammonium solution=97:3 (volume%) under a condition of a liquid temperature of 50°C, a laminated body comprising the cured material, and a semiconductor device comprising the cured material. (In formula (A-1), XA1 represents a specific structure and YA1 represents a bivalent linking group).SELECTED DRAWING: None

The invention belongs to the technical field of chemical synthesis, and provides a green method for preparing tetramethylammonium bicarbonate, which comprises the following steps: step 1, adding dimethyl carbonate into a solvent at room temperature to obtain a mixed solution A; step 2, introducing trimethylamine into the mixed solution A obtained in the step 1 at room temperature to obtain a mixed solution B; step 3, introducing mixed gas into the mixed solution B obtained in the step 2 at room temperature, and heating to obtain a mixed solution C; step 4, cooling to room temperature, adding deionized water into the mixed solution C obtained in the step 3, and heating to obtain a mixture D; and step 5, cooling to room temperature, filtering the mixture D obtained in the step 4, collecting solids, and drying to obtain the product tetramethyl ammonium bicarbonate. According to the method, green and environment-friendly dimethyl carbonate and carbon dioxide are used as reagents, so that the use amount of the dimethyl carbonate is reduced, the greenhouse gas carbon dioxide is consumed, and the product yield is effectively increased.

The application relates to the technical field of electrochemical organic synthesis, and particularly provides a method for electrochemically synthesizing a trifluoromethyl selenoxide oxazoline compound and application thereof. The method comprises the following steps: dissolving an N-allyl amide compound, trifluoromethyl selenoxide tetramethyl ammonium, an electrolyte and an acid in a solvent to form a reaction system, applying a 10 mA constant current to perform electrolysis reaction under the condition of an air atmosphere and room temperature with a carbon rod as an anode and a platinum sheet as a cathode, and obtaining the target trifluoromethyl selenoxide oxazoline compound through post-treatment after the reaction is completed. The method has the advantages of wide substrate applicability and simple post-treatment, and provides a new route for synthesizing the trifluoromethyl selenoxide oxazoline compound. Experiments show that the obtained trifluoromethyl selenoxide oxazoline compound has significant antifungal activity and good drug development potential.

The invention relates to an all-vanadium redox flow battery positive electrode electrolyte containing a quaternary ammonium salt ionic liquid additive, the quaternary ammonium salt ionic liquid additive is characterized in that cations are one or more than two of tetramethyl ammonium salt, trimethyl ethyl ammonium salt, ethyl trimethyl ammonium or methyl triethyl ammonium, anions are phosphate radicals, and the quaternary ammonium salt ionic liquid additive is one or more than two of tetramethyl ammonium salt, trimethyl ethyl ammonium salt, ethyl trimethyl ammonium or methyl triethyl ammonium. And the concentration of the ionic liquid in the positive electrode electrolyte is 0.01 mol / L to 0.1 mol / L. According to the invention, the quaternary ammonium salt-containing ionic liquid is used as the positive electrode electrolyte additive, so that the problem of capacity fading generated when the battery operates under a high-temperature condition can be effectively inhibited, and stable operation of the battery is realized. The preparation process disclosed by the invention is simple to operate, energy-saving, environment-friendly and low in cost, and meanwhile, stable operation of the electrolyte in the battery can be realized.

This invention discloses a bifunctional nano-modification method for high-performance layered ammonium vanadate cathode materials used in aqueous zinc-ion batteries. The aim is to address the problems of easy collapse of the layered structure, low intrinsic conductivity, and severe vanadium dissolution associated with ammonium vanadate (NVO) as a cathode in aqueous zinc-ion batteries. This method utilizes tetramethylammonium ions (TMA)... + A bifunctional nanoengineering strategy combining the pillar effect and the conductive hybridization of graphene oxide (GO) was employed, firstly by incorporating NH4 in the interlayer of NVO. + Replace with TMA + As a molecular column, TMA was obtained. + Intercalated TNVO was then combined with GO to construct a continuous two-dimensional conductive network, thus obtaining a TNVO@GO nanocomposite cathode material. The modified material of this invention exhibits increased interlayer spacing, significantly reduced lattice strain, and a substantial increase in conductivity, while effectively suppressing vanadium dissolution, thereby significantly improving the electrochemical performance of vanadium-based materials for aqueous zinc-ion batteries.

The invention relates to the technical field of high-temperature-resistant adhesives, in particular to a single-component modified inorganic high-temperature-resistant structural adhesive and a preparation method thereof. The single-component modified inorganic high-temperature-resistant structural adhesive provided by the invention is prepared from the following raw materials in parts by mass: 25 to 50 parts of water glass, 15 to 35 parts of aluminum oxide, 10 to 30 parts of silica powder, 5 to 10 parts of mica powder, 10 to 30 parts of modified aluminum powder, 1 to 3 parts of silicon carbide whiskers, 3 to 5 parts of octahydroxy butylated cage-shaped polysilsesquioxane and 0.5 to 1 part of tetramethyl ammonium cage-shaped polysilsesquioxane. The high-temperature-resistant adhesive provided by the invention solves the problem that the existing inorganic high-temperature-resistant adhesive is not resistant to mechanical impact or violent temperature change, and also solves the problem that the single-component silicate high-temperature adhesive is short in storage time.

The application discloses ZON structure aluminum phosphate molecular sieve and a synthesis method and application thereof. The synthesis method of the ZON structure aluminum phosphate molecular sieve comprises the following steps: S1, mixing an aluminum source, water, a phosphorus source, a main template agent TMA + , seed crystals and a co-template agent co-SDA to obtain an initial gel; TMA + is tetramethylammonium, and the co-SDA is an organic amine reagent different from the TMA + ; S2, crystallizing the initial gel in the step S1 under a closed condition to obtain ZON structure aluminum phosphate UiO-7 molecular sieve raw powder. The UiO-7 molecular sieve synthesized by the method has high crystallinity, and the yield reaches more than 70%. The molecular sieve can be used for adsorbing heat storage materials, heat pump materials, refrigeration materials or gas adsorption and separation, and the effect is good; the method is simple in operation, free of fluorine, low in cost, and raw materials are commercially available, and is suitable for industrial production.

Provided herein is a small crystal size aluminosilicate zeolite having an intergrowth structure of a SBS framework structure and a SBT framework structure, designated as SSZ-133. The aluminosilicate zeolite may be synthesized by (a) preparing a synthesis mixture comprising a source of alumina, a source of silica, an organic template containing a tetramethylammonium cation, a source of hydroxide ions, a source of cesium cation, and water; (b) heating the synthesis mixture under crystallization conditions including a temperature of from 50°C to 150°C for a time sufficient to form crystals of the zeolite; and (c) recovering at least a portion of the zeolite from step (b). The source of alumina is free of, essentially free of, or substantially free of an aluminum alkoxide and the source of silica is free of, essentially free of, or substantially free of colloidal silica.

The application discloses a preparation method of hydrogel particles for observing behaviors of benthic shellfish and application of the hydrogel particles in an artificial substrate, and has the following characteristics: acrylamide and N,N'-methylene bisacrylamide are dissolved in deionized water, potassium persulfate and tetramethylammonium are sequentially added to obtain a hydrogel solution, the hydrogel solution is transferred to a circular mold, solid particles are formed after standing in a fume hood, and the solid particles are washed and dried in an oven to obtain the hydrogel particles for observing behaviors of benthic shellfish, the addition concentration of acrylamide in the hydrogel solution is 60% to 65% of the mass of deionized water, and the application of the hydrogel particles in preparing the artificial substrate for observing behaviors of benthic shellfish is also provided, and the hydrogel particles have the advantages of high density, high transparency, non-toxicity and the like, and can be effectively applied to observing behavior trajectories of benthic organisms.

The application is suitable for the technical field of semiconductor material cleaning, and provides a cleaning agent composition for silicon wafer cleaning and a preparation method thereof.The composition is composed of stearoyl lactylate tetramethylammonium, succinylated epsilon-polylysine, isomeric fatty alcohol polyoxyethylene polyoxypropylene ether, non-metal pH adjuster and deionized water; the stearoyl lactylate tetramethylammonium is a tetramethylammonium salt of stearoyl-2-lactylate, which is prepared by neutralizing sodium stearoyl lactylate after sodium removal by ion exchange with tetramethylammonium hydroxide and does not contain a metal counter ion; the succinylated epsilon-polylysine is a partial succinylated product of epsilon-polylysine modified by amide with succinic anhydride, which has dual functions of static capture and chelation bridge breaking; the two synergistically remove submicron particles on the surface of the silicon wafer under the premise of zero metal ion introduction, and meet the requirements of advanced processes for super-clean surfaces.

The present application relates to sewage treatment technical field, specifically to a kind of composition for inhibiting hydrogen sulfide generation in drainage system and its application method.The present application for inhibiting hydrogen sulfide generation in drainage system composition is made of NO donor and tetramethylammonium phosphonium sulfate;And the mass ratio of NO donor and tetramethylammonium phosphonium sulfate is 1:2~2.5.The present application breaks through the retardation of EPS barrier to inhibitor diffusion by the synergistic mechanism of "NO induces biofilm dispersion-tetramethylammonium phosphonium sulfate precise inhibition of SRB metabolism", overcomes the defects of low SRB sensitivity and large amount of medicament caused by biofilm protection in traditional technology;In addition, since tetramethylammonium phosphonium sulfate has good biodegradability and environmental safety, it solves the problem of greater environmental impact of most current hydrogen sulfide generation inhibitors (such as glutaraldehyde, molybdate), realizes efficient, economic and green hydrogen sulfide source reduction.

The utility model discloses a kind of treatment device of tetramethylammonium hydroxide-containing wastewater, including with the first pH adjusting tank of tetramethylammonium hydroxide-containing wastewater pipeline connection, the first pH adjusting tank outlet is connected with the second pH adjusting tank through feeding pipeline, the second pH adjusting tank outlet is connected with resin adsorption column import end through liquid feeding pipeline, the resin adsorption column outlet end is connected with reverse osmosis membrane equipment import through purification pipeline, the concentrated water outlet of reverse osmosis membrane equipment is connected with the feed tank of tetramethylammonium hydroxide production area through tetramethylammonium salt aqueous solution pipeline, the membrane production water of reverse osmosis membrane equipment is connected with biochemical treatment area equipment through pipeline;The utility model makes that tetramethylammonium hydroxide in wastewater is effectively purified and recycled.