24 results about "Alkoxide" patented technology

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.

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.

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.

Process for the preparation of substituted ferrocene and ferrocene-containing polymers, comprising a step (a) in which ferrocene (bis(5-cyclopentadienyl)iron) is reacted with an organometallic base of lithium neopentyl (LiNp, LiCH2C(CH3)3) and an alkali alkoxide to give 1,1',3,3'-metallated ferrocene of the structure wherein M is an alkali metal, wherein the organometallic base has the structural formula K4Np(OtAm)3 or Na4Np(OtAm)3, wherein Np is a neopentyl group with structural formula CH2C(CH3)3 and OtAm is a tert-amyl oxide group with structural formula OC(CH3)2(CH2CH3).

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 application belongs to the technical field of battery materials, and particularly relates to a titanium dioxide / graphene composite material and a preparation method and application thereof. The preparation method of the titanium dioxide / graphene composite material comprises the following steps: S1, stirring titanium alkoxide into anhydrous ethanol to form a uniform and transparent titanium alkoxide solution; S2, ultrasonically dispersing graphene in pure water to form a uniform graphene dispersion liquid; S3, dropping the titanium alkoxide solution into the graphene dispersion liquid to perform stirring treatment to obtain a mixed liquid; S4, dropping glacial acetic acid into the mixed liquid to perform heating and stirring to form a sol, and after aging, performing drying and crushing to obtain a composite precursor powder; and S5, performing annealing treatment on the composite precursor powder under a nitrogen atmosphere, and cooling to room temperature to obtain the titanium dioxide / graphene composite material. When applied to a battery, the application can ensure extremely low electrode internal resistance, and simultaneously strongly inhibit a hydrogen evolution side reaction.

A method of forming a chalcogenide-based thin film by atomic layer deposition may include a first cycle of forming a Ge—Se layer on a substrate by supplying a Ge precursor, a Se precursor, and a C1-C4 alcohol as a co-reactant into a reaction chamber provided with the substrate, and a second cycle of forming a Sb—Se layer on the substrate by supplying a Sb precursor, a Se precursor, and a C1-C3 alcohol, as a co-reactant into the reaction chamber. The Ge precursor may include an alkylamine group. The Se precursor may include an alkylsilyl group. The Sb precursor may include an alkoxide group. The first cycle may include p first subcycles. The second cycle may include q second subcycles. Also, p and q are each independently may be selected from integers of 1 to 10. The first cycle and the second cycle may be alternately performed multiple times.

This invention provides a water-based printing coating for aluminum coils and its preparation method, belonging to the field of coating technology. The invention introduces siloxane active groups into the chain ends of a water-based polyurethane prepolymer with isocyanate-terminated groups via an aminosilane coupling agent. This is combined with the chelation control of titanium alkoxides by acetylacetone and the formation of a titanium-silicon composite sol through acidic hydrolysis and condensation of tetraalkoxysilane and epoxysilane coupling agents. Finally, this sol is cured and mixed with a silane-terminated water-based polyurethane emulsion. This allows the coating to construct a uniform organic-inorganic hybrid network in situ during curing and film formation, and to form a more stable chemical anchoring and dense shielding structure at the aluminum substrate interface. Thus, while maintaining the workability of the water-based system, it significantly improves the adhesion, hardness, and corrosion resistance of the aluminum coil coating.

The invention provides certain mixed Sn (II) amide / alkoxide precursor compounds. These compounds are useful in precursor compositions in the vapor deposition of tin-containing films such as tin oxide films onto a surface of a microelectronic device. These precursor compounds are useful in, for example, extreme ultraviolet light (EUV) lithography techniques used in microelectronic device manufacturing when paired with certain counter-reactants in a vapor deposition process. In this process, the resulting organotin polymeric surface is thus EUV-patternable insofar as when exposed to a patterned beam of EUV light, exposed portions are subjected to further reaction, thus creating regions which are chemically and physically different; this difference enables further processing and lithography of exposed regions and / or non-exposed regions and lithography in pursuit of the ultimate fabricated microelectronic device.

This invention discloses a low-cost, easily sinterable ZrC / SiC multiphase ceramic precursor, the multiphase ceramic, and its preparation method. Using a low-cost difunctional siloxane as the silicon source and a zirconium alkoxide as the zirconium source, the copolymerization rate of the two components is controlled by a dual-ligand mechanism, achieving the copolymerization reaction of Zr-O and Si-O components. This yields a ZrC-Si multiphase ceramic precursor with Zr, Si, C, and O uniformly distributed at the nanoscale. Significant sintering occurs after pressureless pyrolysis at 1600℃ for 2 hours, transforming it into a multiphase ceramic with a cross-dispersed ZrC and SiC structure. The choice of siloxane as the silicon source significantly reduces the preparation cost of the multiphase ceramic precursor, thus showing broad application prospects in the field of ultra-high temperature ceramic matrix composites.

Provided is a method for producing positive electrode active material particles having a core-shell structure and excellent film thickness uniformity of a coating layer. The method for producing positive electrode active material particles is characterized by including, in the following order: a step (i) for mixing a specific alkoxide monomer and / or an oligomer thereof with an organic solvent to obtain a mixed solution 1; a step (ii) for mixing the mixed solution 1 with core particles formed of a composite oxide to obtain a mixed solution 2; and a step (iii) for adding a specific hydrolyzing agent to the mixed solution 2 to hydrolyze and dehydrate-condense the alkoxide monomer and / or oligomer and deposit the resultant on the surface of the core particles, thereby obtaining a mixed solution 3 in which positive electrode active material particles having a core–shell structure are dispersed, wherein, when the total amount of alkoxy groups contained in the specific alkoxide monomer in the mixed solution 2 is A (mol) and the total amount of water in the hydrolyzing agent in the mixed solution 3 is B (mol), A and B satisfy a specific relationship.

The present invention relates to a method for preparing a precursor material of a coated cathode active material comprising: (a) a step of preparing a solution containing a hydroxide, a nitrate, an acetate or an alkoxide of a metal M with M being other than lithium, (b) a step of bringing the particles of a precursor material of a cathode active material in oxide, hydroxide or carbonate form into contact with the solution prepared in step (a), (c) optionally a step of recovering the particles obtained at the end of step (b), (d) a step of drying the suspension obtained at the end of step (b) or optionally the particles recovered in step (c), whereby a precursor material of a cathode active material coated with a layer based on a metal M is obtained. The present invention also relates to the use of said method for preparing a coated cathode active material.

This invention discloses a photosensitive nanocrystalline material and its preparation method, belonging to the field of photoresist manufacturing technology. To address the problems of low light absorption efficiency, insufficient resolution, and complex preparation of existing photoresist materials, this invention uses an Hf / Zr mixed metal alkoxide precursor and prepares it through steps including anhydrous hydrolysis, two-phase reaction, surface modification, and photosensitive addition. Specifically, it includes: (i) reacting ultrapure water with the first ligand A at low temperature to form a 1.5-3 nm metal oxide nanocrystalline sol; (ii) growing crystals through an alkaline reaction in the two-phase system; (iii) surface modification with bridging 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-baking to form a film. This material is suitable for negative lithography processes, with an EUV absorption efficiency >85% and an LWR <2 nm. The method of this invention is simple to operate, has a yield >85%, significantly improves material stability and resolution, and is suitable for sub-10 nm semiconductor lithography.

This invention, entitled "A Composite Electrolyte Additive Composition, Electrolyte, and its Preparation and Application," belongs to the field of lithium-ion battery technology. The technical problem to be solved is the poor oxidative stability, low ion transference number, and poor cycle performance and high-efficiency kinetics of the electrolyte. The composite electrolyte additive composition provided by this invention comprises a nitrile compound and an aluminum alkoxide compound; the structural formula of the nitrile compound is shown in Formula I, wherein R1 is selected from substituted or unsubstituted C1-C12 straight-chain or branched saturated alkyl groups, C2-C12 alkenyl groups, C2-C12 alkynyl groups, C3-C12 cycloalkyl groups, C2-C12 alkoxyalkyl groups, unsubstituted C6-C18 aryl groups, and C6-C18 aryl groups substituted with alkyl or cyano groups; the structural formula of the aluminum alkoxide compound is shown in Formula I, wherein R2-R4 are each independently selected from alkyl groups with 1-8 carbons.

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.

The application discloses a synthesis method of high-purity silica crystal with successive online replenishment, and belongs to the technical field of material synthesis. The synthesis method of the application uses water glass as raw material, adds a promoter, and adopts an online successive replenishment hydrothermal crystallization synthesis process. The process is simple, the reaction condition is relatively mild, and the process is easy to control. No new impurities are introduced, and the slow directional growth of the crystal is facilitated. In addition, the high-purity silica crystal obtained by the application has the same crystal lattice as natural quartz, is a quartz crystal type, does not need to be crushed, and can effectively solve the problems of non-crystal synthesis, easy carbon residue, high bubble body coating, high hydroxyl and the like caused by raw materials such as organosilicon alkoxide, and can alleviate the shortage of natural quartz ore to a certain extent, and can be applied to industrial scale production.

The present disclosure relates to the field of precursors, more specifically precursors containing at least one fluorinated group. In some embodiments, the precursors are hafnium, zirconium, and titanium bis(cyclopentadienyl) precursors containing fluorinated alkoxides and amides. In some embodiments, the present disclosure relates to using precursors for deposition of group 4 containing thin films, such as HfOx, ZrOx, and TiOx film applications. These thin films can be used in a variety of applications including semiconductor device structures. The compounds of the present disclosure have been developed and synthesized to generate compounds that provide improvements in film applications, such as HfOx, ZrOx, and TiOx film applications. The improvements to the compounds of the present disclosure include increased molecule stability at delivery temperature and deposition temperature, improvements related to precursor film impurity levels, molecule volatility, molecule melting point, and step coverage.

A method for preparing titanide zeolites, such as titanide chamazoite-type (CHA) zeolites or titanide AEI zeolites. The method includes (i) forming a reactive gel comprising a precursor zeolite, a structure-directing agent (SDA), NaOH and / or KOH, and a SiO2 source; and (ii) heating the reactive gel. The precursor zeolite comprises a titanium-loaded precursor zeolite, and heating the reactive gel comprises heating to a temperature suitable for converting the titanium-loaded precursor zeolite into titanide zeolite and maintaining this temperature for a suitable duration. The titanium-loaded precursor zeolite can be prepared from organotitanium compounds, such as titanium alkoxides.