14 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 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 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.

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 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.

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.

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 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.