85 results about "Alkoxide" patented technology

The invention relates to a novel composite bipolar membrane for preparing low-carbon alcohol alkali metal salt and an electrodialysis process of the novel composite bipolar membrane, and belongs to the technical field of membrane separation and electrochemical synthesis. The composite bipolar membrane comprises a cation exchange layer, a middle catalyst layer and an anion exchange layer which are sequentially laminated and compounded, the process comprises the following steps: introducing a salt solution containing alkali metal ions into an anode chamber of a bipolar membrane electrodialysis system, and introducing a low-carbon alcohol solution into a cathode chamber; applying a direct-current electric field to the two sides of the composite bipolar membrane, so that the low-carbon alcohol is dissociated at the membrane interface to generate alkoxy ions and hydrogen ions; the alkoxy ions migrate to an anode chamber to be combined with the alkali metal ions to generate low-carbon alcohol alkali metal salt; the membrane material is high in adaptability, the membrane structure is good in stability, technological parameters are mature, and the system integration degree is high.

The invention provides a preparation method of bis-[3-(triethoxysilyl) propyl]-disulfide. The preparation method comprises the following steps: S1, under the protection of nitrogen, dropwise adding chloropropene and trichlorosilane into a non-polar solvent, a first catalyst and tripropylamine, reacting at room temperature, taking filtrate, dropwise adding the filtrate into alcohol in a micro-reflux state, reacting, adding a sodium alkoxide / alcohol solution for neutralizing, filtering, and distilling to obtain allyltriethoxysilane; and S2, under ultraviolet light, mixing allyltriethoxysilane, mercaptopropyltriethoxysilane and benzoin dimethyl ether, reacting at room temperature for 2-3 hours, adding sulfur and a second catalyst, carrying out heating reaction, removing low boiling points, cooling, and filtering. According to the preparation method provided by the invention, bis-[3-(triethoxysilyl) propyl]-disulfide is successfully and effectively synthesized, a phase transfer catalyst does not need to be introduced for catalysis, hydrolysis of silane and treatment of saline water are reduced, the yield of single-kettle synthesis is high, and the utilization rate of equipment is high.

The invention discloses a hydrogenated butadiene-acrylonitrile rubber composite material for cryogenic heat preservation and a preparation method thereof in the field of polymer composite materials, and the composite material is characterized in that zirconium-silicon composite modified hydroxyapatite and boron-nitrogen co-doped mesoporous alumina are introduced, so that the mechanical property and heat preservation effect of the material in a low-temperature environment are remarkably improved. The zirconium-silicon oxide network is constructed on the surface of hydroxyapatite by adopting a sol-gel method, and the doped mesoporous structure with the high specific surface area is obtained by adopting alkoxide as a precursor through hydrothermal treatment and calcination. When the rubber is mixed, the functional filler is dispersed at a high temperature, and then the plasticizer is added to ensure uniform distribution of the filler. The obtained composite material has excellent tensile strength, elongation at break and low heat conductivity coefficient at the liquid nitrogen temperature, and is suitable for the cryogenic thermal insulation fields of hydrogen energy storage and transportation, aerospace sealing and the like. All the raw materials are commercially available chemicals, the process is controllable, and industrial production is easy.

A process for the production of a C6-18 alkyl ester of 4-aminobenzoic acid of formula (I), wherein the process comprises the step of reacting the 4-aminobenzoic acid of formula (II) with an hydroxy compound of formula (III) in the presence of a catalyst to generate a C6-18 alkyl ester of 4-aminobenzoic acid of formula (I) wherein R is a C6-18 alkyl group; and wherein the catalyst is a titanium catalyst, preferably a titanium alkoxide catalyst.

A system and method for chemically destroying, degrading and incinerating a fluorocarbon or fluorinated material, such as perfluoroalkyl and polyfluoroalkyl substances (PFAS), with reduced emissions of gaseous PFC is provided. The method includes mixing the fluorinated material with an aqueous alkoxide base in a batch reactor to form a suspension. The PFAS can be provided by AFFF. The reaction mixture is heated to a temperature ranging from about 25ºC to about 400ºC for about 0.5 hours to about 240 hours to defluorinated fluorocarbons in the PFAS and produce a defluorinated waste product. More specifically, the method converts organic fluorine present in the PFAS to inorganic fluoride. Thus, the defluorinated waste product can be incinerated with reduced emissions of harmful gaseous PFCs.

This invention discloses a veterinary aluminum hydroxide adjuvant for foot-and-mouth disease (FMD) vaccines and its preparation method via aluminum alkoxide hydrolysis. The adjuvant is a boehmite phase, and through innovative processing, the crystallinity and morphology are synergistically controlled, achieving a relative crystallinity of 10%-25%. The primary particles are rod-shaped or needle-shaped, with an average aspect ratio of 4:1 to 8:1. The preparation method includes: dissolving an aluminum alkoxide compound, then subjecting it to a controlled hydrolysis reaction at 50-80℃ and pH 4.5-6.5 under normal pressure for 36 hours, followed by aging at 425℃ for 2472 hours. The product is obtained after solid-liquid separation, washing, and drying. The obtained adjuvant exhibits an adsorption rate of over 96% for FMD virus inactivated antigen within 1 hour, and a cumulative antigen dissociation rate of less than 5% after 7 days at 37℃. In vitro stimulation of macrophages to secrete IL-1β and TNF-α levels is more than 1.7 times that of commercially available aluminum hydroxide adjuvants, significantly superior to traditional aluminum hydroxide adjuvants, providing a new material for the preparation of highly effective FMD vaccines.

The film includes a substrate and a coating deposited on the substrate. The coating includes a plurality of bilayers, each including two layers of different materials. Each of the two layers of different materials may comprise an oxide, a metal oxide, an alkoxide, an MLD method metal inorganic-organic hybrid, or an oxynitride. The thickness of each of the two layers of different materials may be from about 3 nanometers to about 30 nanometers. The thickness of the coating may be from about 20 nanometers to about 100 nanometers. The film with its nanoscale coating may be used in food packaging and other applications.

This invention relates to an electrolyte for lithium-ion batteries or lithium metal batteries, a method for preparing the electrolyte, and a lithium battery. The electrolyte comprises a lithium salt, an organic solvent, and functional additives, wherein the functional additives include aluminum alkoxide compounds. A battery containing the additives is also provided. Based on the discovery that ethylene carbonate (EC) degrades battery thermal safety under high-temperature thermal abuse conditions, aluminum isopropoxide is innovatively introduced as a functional additive. This additive is stable at room temperature, but under high-temperature thermal abuse scenarios, it can act as a Lewis acid catalyst, specifically catalyzing the ring-opening polymerization reaction of EC in the electrolyte to generate polymer segments. Compared with existing technologies, the electrolyte provided by this invention effectively improves the high-temperature storage performance and thermal shock resistance of the battery without sacrificing its room-temperature electrochemical performance.

Methods for forming a vapor deposition precursor are provided. The method comprises contacting an aluminum halide compound, an alkoxy aluminum compound, and a Grignard reagent to form the vapor deposition precursor. The vapor deposition precursor comprises an dialkyl aluminum alkoxide compound. The vapor deposition precursor is formed without use of a pyrophoric compound. Related compositions, related precursors, and related methods are also provided, among other things.

The present invention relates to a process for preparing at least one alkali metal methoxide by reactive distillation in at least one reaction column. At the lower end of the reaction column(s), the respective alkali metal methoxide dissolved in methanol is withdrawn. The methanol / water mixture obtained at the top of the reaction column(s) is separated by distillation in a rectification column.The vapours obtained at the upper end of the rectification column are compressed in at least two stages and the energy of the vapours compressed in each case is advantageously transferred to bottoms and side streams of the rectification column. This allows particularly efficient use of the energy of the compressed vapours in the process according to the invention. In addition, the energy in the product stream of alkali metal methoxide which is obtained at the lower end of the reaction column(s) is advantageously transferred to the vapour streams from the rectification column, especially before these vapours are subjected to compression.The energy from the compressed vapour may additionally be used for operation of the reaction column(s) or for operation of a reaction column in which a process for transalcoholization of alkali metal alkoxides is performed.

The invention provides a bromo-oxime ether content detection method which is characterized by comprising the following steps: adding a bromo-oxime ether reaction solution into an anhydrous aprotic polar solvent, adding a sodium alkoxide solution for reaction, and purifying to obtain a standard sample of a bromo-oxime ether sodium alkoxide derivative; adding the bromo-oxime ether reaction solution into an anhydrous aprotic polar solvent, and adding a sodium alkoxide solution for reaction to obtain a to-be-detected sample of the bromo-oxime ether sodium alkoxide derivative; and analyzing the standard sample and the sample to be detected by adopting a high performance liquid chromatography external standard method to obtain the content of bromo-oxime ether in the bromo-oxime ether reaction liquid. The method is high in detection accuracy, good in repeatability and suitable for being applied to the scenes of laboratory research and development, factory production and the like.

Organotin compositions suitable for radiation-based patterning have ligands that provide a fluorinated group and an unsaturated carbon-carbon bond, such as a C=C bond. The fluorinated group and the unsaturated carbon-carbon bond may or may not be located on the same ligand. Blends of precursors with different ligands provide additional flexibility in precursor design. Fluorinated organometallic compounds are given by formula R UF It can be expressed by Sn(OR')3, where R UF R' is an organic group consisting of 1 to 31 carbon atoms, having at least one C=C bond and at least one fluorine atom bonded to carbon, and this organic group forms a C-Sn bond, while R' is an organic group consisting of 1 to 10 carbon atoms. The precursor is suitable for liquid-phase or gas-phase deposition.

The invention discloses a photosensitive nanocrystal material and a preparation method thereof, and belongs to the technical field of photoresist production processes. In order to solve the problems that an existing photoresist material is low in light absorption efficiency, insufficient in resolution ratio and complex in preparation, an Hf / Zr mixed metal alkoxide precursor is adopted, and the photoresist material is prepared through the steps of anhydrous hydrolysis, two-phase reaction, surface modification, photosensitive addition and the like. The method specifically comprises the following steps: (i) dropwise adding ultrapure water at a low temperature to react with a first ligand A to form 1.5-3nm metal oxide nanocrystalline sol; (ii) reacting alkali liquor in the two-phase system to grow crystals; (iii) carrying out surface modification on the bridged ligand B and the second ligand C; and (iv) adding a photoacid generator and a free radical photoinitiator, filtering with a filter membrane, and pre-drying to form the membrane. The material is suitable for a negative photoetching process, and the EUV absorption efficiency is gt; 85%, LWRlt; 2 nm. The method is simple to operate, and the yield is gt; the stability and the resolution ratio of the material are remarkably improved, and the material is suitable for sub-10nm semiconductor photoetching.

A polishing liquid for CMP includes abrasive grains, an additive A, a cationic polymer, and water, in which the additive A contains a compound having an ethylenediamine structure bonded to a hydroxyalkyl group or an alkoxide group. A polishing liquid set for CMP includes a first liquid and a second liquid, in which the components of the polishing liquid for CMP are separately stored in the first liquid and the second liquid, the first liquid contains the abrasive grains and water, and the second liquid contains the additive A, the cationic polymer, and water. A polishing method includes a step of polishing a surface to be polished using the polishing liquid for CMP.

The invention provides a method for catalyzing polyamide depolymerization. The method comprises the following step: carrying out a depolymerization reaction on polyamide in diester carbonate in the absence of a catalyst or under the condition of taking an alkoxide substance as a catalyst. According to the method, the polyamide is depolymerized into the ester monomer under the mild condition through the reaction of the diester carbonate and the polyamide, and the method is suitable for related technology research and development of chemical recovery of any polyamide and polyamide monomer in a mixed system of the polyamide. The method provided by the invention has the advantages of high efficiency, greenness, mild reaction conditions and the like, the polyamide is depolymerized to generate the monomer, and the method has relatively high industrial application value.

This invention discloses a method for preparing highly dense human aluminum hydroxide adjuvants via aluminum alkoxide hydrolysis, belonging to the field of biopharmaceutical and vaccine formulation technology. This invention uses linear C2-C4 alkyl-substituted sterically hindered aluminum alkoxides as the sole aluminum source, employing an alcohol-aprotic inert solvent dual-solvent system, combined with a composite directing agent containing hydrolysis inhibitors and crystal plane directing agents. The water-aluminum molar ratio is controlled at 3:1 to 10:1, and hydrolysis is carried out at 60℃ to 98℃, eliminating the need for high-temperature and high-pressure crystallization treatment. A single hydrolysis reaction directly yields boehmite-type highly dense human aluminum hydroxide adjuvants with a crystallinity ≥50%. This invention overcomes long-standing technical biases in the field, featuring a simple process, low energy consumption and raw material costs, and a product with excellent antigen adsorption performance and storage stability. It is easily scaled up using GMP and adaptable to the needs of various human vaccine preparations.

This invention relates to a method for solution copolymerization to obtain hydroxyl-functionalized polyolefins, comprising at least the following steps: a) a contacting step for obtaining a mixture of oligomeric dialkyl aluminum alkoxides, wherein the alkoxide anion is a mixture of enol anions and alkanolate anions; b) a polymerization step of at least one olefin monomer with at least the mixture obtained in step a); and c) a deprotection step, wherein the product obtained in step b) is treated with an aliphatic alcohol and / or water and / or Brønsted acid or alkaline solution to obtain the hydroxyl-functionalized polyolefin.

The invention discloses a method for catalyzing waste nylon 6 to be depolymerized into caprolactam, and belongs to the technical field of polyamide waste material depolymerization. The problems that an existing nylon 6 depolymerization method lacks a cheap, easily available and efficient catalytic system, and the purity of caprolactam monomers obtained by catalyzing nylon 6 depolymerization is low are solved. Sodium caprolactam or potassium caprolactam which is cheap, easy to obtain and low in cost and can be prepared from caprolactam, sodium hydroxide / potassium hydroxide, sodium alkoxide / potassium alkoxide and the like through simple process steps is adopted as a depolymerization catalyst, participation of additional solvents such as water is not needed, and the caprolactam is efficiently depolymerized through nylon 6 under the reduced pressure heating condition; the catalyst is prevented from remaining in the product, the purity of the recovered monomer is high, the monomer product can be directly recycled, and the recycling efficiency of the nylon 6 is improved.

The present invention provides a method for depolymerizing polyethylene terephthalate ("PET"), which comprises depolymerizing PET with glycols and M A In a mixture containing OR, it is converted to bis(2-hydroxyethyl) terephthalate (BHET; CAS number: 959-26-2), and M A is an alkali metal selected from sodium, potassium, and lithium, and R is an alkyl group having 2 to 7 carbon atoms. A OR is a short-chain alkoxide M by alcohol exchange reaction. A OR'. The process according to the invention is characterized by a particularly low proportion of the undesired degradation products mono(2-hydroxyethyl) terephthalate (= "MHET") and terephthalate (= "TS") relative to the proportion of BHET. As a result, the process according to the invention provides a high yield of BHET, which can be used directly for the production of new PET. The invention therefore also relates to a process for recycling PET, in which BHET obtained in a process for depolymerizing PET, optionally after further purification, is polymerized again to PET.

A method of encapsulating a biomolecule in a silica shell to form a particle, the method comprising: • a) hydrolyzing a mixture of silica precursors, said mixture comprising a functionalized silica precursor comprising a Si-C bond and a non-functionalized silica alkoxide precursor, • b) directly contacting the hydrolyzed precursors with an aqueous solution comprising the biomolecule and • c) encapsulating the biomolecule in a silica shell to form a particle, such that at least a portion of the silica on the interior surface of the silica shell is functionalized and comprises a Si-C bond.

A method for coproducing a halogen and hydrogen can include dissolving at least one halogen containing polymer from a waste source in a solvent. The solvent having the at least one halogen containing polymer dissolved therein is then admixed with an alkoxide base under conditions to dehalogenate the at least one halogen containing polymer and precipitate at least one dehalogenated polymer, resulting in an admixture comprising the precipitated at least one dehalogenated polymer, a halogen salt, and an alkyl alcohol. The precipitate is separated and the halogen salt and the alkyl alcohol remain in the solvent. The halogen salt and the alkyl alcohol into an electrochemical cell, wherein upon application of a voltage, halogen ions from the halogen salt are converted to a halogen gas at the anode and the alkyl alcohol reacts at the cathode to generate an alkoxide and hydrogen gas.

This invention discloses a method for preparing long-term stable ultra-high purity silica sol. The method involves preparing silica sol using an alkoxide method, followed by forced cyclic desolvation. By adding conjugate acid-base ionic dispersants, the pH and thermal stability of the silica sol are maintained. The prepared silica sol is then modified and subjected to high-pressure aging to ultimately obtain an ultra-high purity silica sol with a mass fraction of over 20%, a primary particle size between 30-150 nm, a secondary particle size between 50-350 nm, and an association degree between 1.7-2.3. The silica sol has a metal ion content of less than 1 ppm, a loss of less than 5% during preparation, and exhibits excellent polishing performance.

An object of the present disclosure is to provide a novel method for producing a 1,3-dioxolane compound having a 2-(difluoromethylene) structure (e.g., 2-(difluoromethylene)-4,4,5-trifluoro-5-(trifluoromethyl)-1,3-dioxolane) from a corresponding carboxylic acid salt, the method suppressing the production of HF adducts (e.g., 2-hydro-perfluoro(2,4-dimethyl-1,3-dioxolane)) as by-products. The present disclosure relates to a method for producing a compound represented by formula (1), the method comprising the following steps A, B, C, and D:step A of reacting a compound represented by formula (2) with at least one base selected from the group consisting of hydroxides, carbonates, and alkoxides of alkali metals and alkaline earth metals to produce a compound represented by formula (3), thereby obtaining a reaction product having a pH range of more than 11.0;step B of adding carbon dioxide gas to the reaction product obtained in step A, or a liquid obtained by mixing the reaction product with water, to adjust the pH to 6.0 to 11.0, thereby obtaining a pH-adjusted liquid;step C of concentrating the pH-adjusted liquid obtained in step B to obtain a concentrate; andstep D of heating the concentrate obtained in step C to thermally decompose the compound represented by formula (3), thereby producing the compound represented by formula (1):wherein R1 to R4 are each independently a fluorine atom or a C1-C7 fluoroalkyl group optionally containing ethereal oxygen, X is a hydroxy group, a fluorine atom, a chlorine atom, or a C1-C3 alkoxy group in which one or more hydrogen atoms are optionally replaced by fluorine atoms, and M is an alkali metal atom or an alkaline earth metal atom.

A display device may include a display panel foldable based on at least one folding axis, and a protective member disposed on the display panel. The protective member may include a base layer, a hard coating layer disposed on the base layer, a first low refractive index layer disposed on the hard coating layer, and a primer layer disposed between the hard coating layer and the first low refractive index layer. The primer layer may include a metal compound and a polar compound, the metal compound may include a titanium alkoxide oligomer, a zirconium alkoxide oligomer, or a zirconium chelate compound, and a number of carbon atoms included in the titanium alkoxide oligomer may be 96 to 320. Accordingly, the display device may show excellent display quality and excellent folding reliability.

The invention discloses a method for catalyzing polyester depolymerization by alkoxide. The method comprises the following steps: carrying out chemical depolymerization reaction on polyester or a polyester-containing composite material in diester carbonate in the absence of a catalyst or in the presence of an organic salt as a catalyst, wherein the organic salt comprises metal organic salt and organic anion ionic liquid; anions in the metal organic salt and the organic anion ionic liquid are independently selected from the following anions: alcohol anions, phenol anions, mercaptan anions and thiophenol anions. The method has the advantages of high efficiency, greenness, mild reaction conditions and the like, polyester can be depolymerized to generate the polyester monomer, a new method is provided for chemical conversion of waste polyester plastic, and the method has high industrial application value.

In a first aspect, the invention relates to an integrated process for simultaneously preparing n mixtures P(i) comprising alkali metal methoxide and methanol and for preparing solid alkali metal methoxide A(i)OMe, comprising providing n reactive distillation columns K(i); providing n aqueous liquid streams H(i), a given stream H(i) comprising a dissolved alkali metal hydroxide A(i)OH, wherein n is an integer with n≥2 and i=1…n; and providing a rectification column D; wherein the process comprises preparing the one or more alkali metal methoxides in the n reactive distillation column K(i) under reactive distillation conditions from the n streams H(i) and n streams G(i) comprising methanol, thereby obtaining n top streams W(i) comprising methanol and water; and obtaining n bottoms streams P(i) comprising alkali metal methoxide A(i)OMe and methanol; the process further comprising (a) subjecting at least a part of at least one of the n bottoms streams P(i) comprising alkali metal methoxide A(i)OMe and methanol in a separation unit SU to a solid separation, obtaining a residue enriched in alkali metal methoxide A(i)OMe compared to P(i), preferably containing solid alkali metal methoxide A(i)OMe, and a stream MR(i) comprising methanol; and (b) feeding at least a part of the stream comprising methanol MR(i) obtained in (a) to at least one reactive distillation column K(i) and / or feeding at least a part of the stream comprising methanol MR(i) obtained in (a) to rectification column D. A second aspect of the invention is directed to a chemical production unit for carrying out the process according to the first aspect of the invention. In a third aspect, the invention relates to a use of the chemical production unit according to the second aspect of the invention or of a process according to the first aspect of the invention for simultaneously producing n mixtures P(i) comprising alkali metal methoxide and methanol, n being an integer with n≥2 and i=1…n, wherein either at least 2 of the mixtures P(i) comprise different alkali metal methoxides A(i)OMe, and / or at least 2 of the mixtures P(i) comprise the same alkali metal alkoxide A(i)OMe at different concentrations.

The invention relates to a method for treating ionic liquids in which an iminium salt, in particular in the form of an imidazolium salt, is reacted with an alkoxide to produce an iminium-alkoxide adduct, then the salt produced from cations of the alkoxide with anions of the iminium salt is separated out, and then the iminium salt is regenerated by adding an acid. When the added acid has anions that differ from those otherwise present in the iminium salts, the ammonium iminium alkoxide adducts allow for ease of separation of polar impurities or thorough exchange of anions of the iminium salts by significantly lower polarity than the iminium salts.

The present invention relates to a solid catalyst system comprising a chromium compound, a metal compound, an aluminum compound and a silica support, wherein the silica support has an average particle size in the range of > 20 to < 50 pm, a pore volume in the range of > 1.7 ml / g to < 3 ml / g, and a surface area in the range of > 400 m 2 / g to < 800 m 2 / g, and wherein the aluminum alkoxide compound has the formula R1-Al-OR2, wherein R1 is selected from (C1-C8)alkyl, and OR2 is selected from (C1-C8)alkoxy.

The film comprises a substrate and a coating deposited on the substrate. The coating comprises multiple double layers, each double layer comprising two layers of different materials. Each of the two layers of different materials may contain oxides, metal oxides, alkoxides, metal cones, or oxynitrides. The thickness of each of the two layers of different materials may be between approximately 3 nanometers and approximately 30 nanometers. The thickness of the coating may be between approximately 20 nanometers and approximately 100 nanometers. Films with nanometer-scale coatings can be used for food packaging and other applications.

This invention discloses a fully substituted alkyl alkenyl ether, its preparation method, and its applications. The preparation method includes the following steps: dissolving a catalyst, an additive, a 1-alkyne or polyfluorobenzene, or gem-difluorocyclopropane in a solvent, heating to a set temperature, allowing the reaction to proceed fully, and purifying to obtain the desired fully substituted alkyl alkenyl ether. The additive is one of an alkoxide, an alcohol, or an alkoxide mixed in any proportion. This invention provides a one-step method to obtain a fully substituted alkyl alkenyl ether with a defined configuration, and the preparation method is simple. The catalyst, ligand, additive, solvent, and other raw materials used in the preparation method are all commercially available or readily available, and the reaction conditions are mild, simple, and easy to operate.