139 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 belongs to the technical field of chemical engineering, and particularly relates to an aluminum alkoxide salt and a preparation method thereof. According to the method, argon non-thermal plasma is adopted for bombarding the surface of the aluminum foil, an oxidation film on the surface of the aluminum foil is stripped, active aluminum free radicals are formed, the reaction energy barrier of the aluminum alkoxide salt is reduced, the aluminum alkoxide salt can be synthesized under the catalyst-free condition, and green and efficient synthesis of the aluminum alkoxide salt is achieved; a thiosemicarbazide-carboxylic acid bidentate ligand is adopted for complexing impurity iron in alkoxide aluminum salt, sulfur and nitrogen double coordination sites in a thiosemicarbazide unit are matched with oxygen coordination sites in a carboxylic acid group, higher complexing capacity is formed for the impurity iron, and the stability of the complex is improved; the crystallization is regulated and controlled through the pH response characteristic of the carboxylic acid group, so that the impurity iron in the aluminum alkoxide salt is efficiently removed.

The invention discloses a preparation method and application of ultrahigh-temperature-resistant tantalum carbide ceramic aerogel, and belongs to the field of ultrahigh-temperature ceramic aerogel preparation. The preparation method of the ultrahigh-temperature-resistant tantalum carbide ceramic aerogel comprises the following steps: mixing a complexing agent and tantalum alkoxide in a polyol solvent for reaction, then adding organic acid for catalytic polymerization, then adding phenolic resin and a gel catalyst to obtain a tantalum carbide precursor solution, and carrying out sol-gel reaction to obtain tantalum carbide precursor wet gel; performing drying treatment on the tantalum carbide precursor wet gel to obtain tantalum carbide precursor aerogel, and performing pyrolysis to obtain the tantalum carbide ceramic aerogel. The tantalum alkoxide is modified by using the complexing agent, the polyhydric alcohol and the organic acid, the precursor solution in which the raw materials can stably coexist at room temperature is obtained, an oxide ceramic gel network does not need to be synthesized in the preparation process, normal-pressure drying can be performed, and the obtained tantalum carbide ceramic aerogel has the characteristics of high purity and low residual carbon content.

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 present invention relates to a safe flame-retardant electrolyte and a preparation method thereof, belonging to the technical field of lithium batteries. The electrolyte includes: 11.2 - 13.8 wt% of a lithium salt, 5.5 - 7.0 wt% of a modified phosphazene flame retardant, 2.6 - 3.2 wt% of an auxiliary additive, and the balance is a composite solvent; wherein, the modified phosphazene flame retardant uses tetrafluorobutylene glycol as a raw material, is treated with sodium hydride to synthesize a fluoride with an alkoxide structure, reacts with a hexachlorocyclotriphosphazene matrix, grafts a fluorine-containing group onto the hexachlorocyclotriphosphazene, and then the end is modified with dimethylethenylchlorosilane to introduce an organosilicon and a double bond structure, endowing the electrolyte with good flame retardancy, and at the same time, a silicon-containing protective film can be formed on the surface of the electrode material, reducing the thermal decomposition of the electrode material and the solvent erosion, so that the lithium battery exhibits excellent high-temperature stability.

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.

The present invention relates to a silicon precursor compound in an asymmetric structure containing an alkoxide capable of preparing a silicon-containing thin film with high quality, to a method for preparing the same, and to a method for preparing a silicon-containing thin film using the silicon precursor compound in an asymmetric structure containing an alkoxide.

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.

The invention provides a preparation method and application of perfluorosulfonate. The structural formula of perfluoroether sulfonate is CF2 = CFOCF2CF2SO3M, and M = Li, Na, K or Ca; the preparation method comprises the following steps: adding alkoxide and a hydrofluoroether solvent into a cyclic compound as shown in a formula I in # imgabs0 # to obtain a reaction solution, and heating the reaction solution to obtain CF2 = CFOCF2CF2SO3M. According to the preparation method of the perfluorosulfonate, provided by the invention, the selectivity of the alkoxide and cyclic combination reaction is improved, so that the generation of byproducts is reduced, and the reaction yield is improved.

A composition for an acoustic lens contains the following components (A) to (C):(A) a polysiloxane having a vinyl group;(B) a polysiloxane having two or more Si—H groups in a molecular chain thereof; and(C) zinc oxide surface-treated with at least one surface treatment agent of an aminosilane compound, a mercaptosilane compound, an isocyanatosilane compound, a thiocyanatosilane compound, an aluminum alkoxide compound, a zirconium alkoxide compound, or a titanium alkoxide compound, provided that the aminosilane compound does not have a Si—N—Si structure.

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.

The disclosed and claimed subject matter relates to a method for depositing tin-containing films that includes the steps of (a) contacting a substrate with organotin alkoxide precursor vapor in a deposition reactor, (b) thereafter introducing an organotin amide precursor vapor in a deposition reactor wherein the organo group is different from the organo group in the organotin alkoxide precursor, (c) purging the reactor vessel with inert gas, (d) contacting the substrate with a water-containing vapor to form an organotin oxo network layer, (e) purging the reactor vessel with inert gas.

To provide a novel method for producing pyrrolidine derivatives in fewer steps.SOLUTION: A method for producing 4-oxopyrrolidine-3-carboxamide derivatives represented by formula (1) includes a step A of obtaining a 4-oxopyrrolidine-3-carboxamide derivative represented by formula (1) by treating a compound represented by formula (2) and a compound represented by formula (3) by at least one base selected from alkali metal alkoxides, alkali metal hydrides and alkali metal amides in a solvent.SELECTED DRAWING: None

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.