103 results about "Methoxide" patented technology

The invention discloses a molecularly imprinted polymer and a preparation method and application thereof. The molecularly imprinted polymer of the invention is the molecularly imprinted polymer, which is prepared by using ractopamine as a template, polymerizing the template with a functional monomer, a cross-linking agent, a pore-forming agent and an initiator to form a block polymer, grinding the block polymer, sieving the obtained powder, removing the template by using acetate methoxide and methoxide and carrying out vacuum drying on the obtained product and has high compatibility and obvious selectivity for the ractopamine. The molecularly imprinted polymer of the invention has high compatibility and selectivity for the ractopamine and has wide application prospect in analysis of a sample pretreatment solid phase extraction material of the ractopamine in substrates such as a feed, animal tissue or environment water and the like.

Atomic layer deposition (ALD) type processes for producing titanium containing oxide thin films comprise feeding into a reaction space vapour phase pulses of titanium alkoxide as a titanium source material and at least one oxygen source material, such as ozone, capable of forming an oxide with the titanium source material. In preferred embodiments the titanium alkoxide is titanium methoxide.

The invention relates to a kind of modifying nanometer ZSM-5 molecular-sieve catalyst and its manufacturing method, and it also can be used to produce para-xylene by base reaction with toluene and alkane methoxide. The catalyst uses the nanometer ZSM-5 molecular-sieve as the parent, and uses aluminium oxide, mixed rare earth and their community as the supporter respectively. The active component modifier, such as the oxidate loading La, Mg or Si, undergoes dipping, desiccating and roasting, and then as a result the catalyst can be acquired. In the reaction that toluene and alkane methoxide producing para-xylene, the catalyst has the advantages of the high selectivity, excellent activity and stability and so on.

The invention discloses a preparation method of nanometer aluminium hydroxide, which adopts organic aluminium to hydrolyze and generate nanometer aluminium hydroxide; then the nanometer aluminium hydroxide is served as seed crystal, and inorganic aluminum salt is used for industrially producing nanometer aluminium hydroxide on a large scale so as to effectively ensure the stability of sintetics seed crystal. Organic aluminium can choose aluminium methoxide which has low cost and is easy to synthetize; inorganic salt can be served as basic sintetics, thus greatly lowering raw material cost; the obtained nanometer aluminium hydroxide has favourable dispersibility after modified by silane coupling agent. The nanometer aluminium hydroxide produced with the preparation method of the invention is served as inkjet printing media to ensure that color ink jet printing paper has the characteristics of water resistance, high ink adsorption speed, high gloss, bright color and the like; the nanometer aluminium hydroxide also can be served as the main component to be used in inorganic / organic composite coating, so that the coating has excellent adhesive force, hardness, corrosion resistance and the like.

A zinc-enriched coating against cavity corrosion and its production are disclosed. The coating consists of carbon nanometer tube: 0.3-4 wt%, nanometer zinc powder 3-8 wt%, and organic resin additive 12-30 wt%. The process is carried out by reflux decontaminating for carbon nanometer tube by mixed acid, soaking in diluted lithium aqueous glass, centrifugal treating, collecting or mixing carbon nanometer tube with silicon acid, ball grinding, adding carbon nanometer tube into lithium silicate-sodium silicate solution, adding into organic resin, heavy potassium chromate solution, FC80, methyl-methoxide, multifunctional accessories and de-foaming agent while agitating to obtain coating component A, mixing ordinary zinc powder with nanometer zinc powder proportionally to obtain coating component B, and mixing component A with component B proportionally to obtain final product.

The double-function catalyst for synthesizing cyclic carbonate and methyl carbonate includes main catalyst quadridentate Schiff base aluminum complex (R1)(R2)SalenAlX, where R1 and R2 is H, Cl-C6 alkyl, alkoxy Cl, Br, NO2 and other group; and X is C1, Br, I, OR NO3, CH3COO, ClO4 BF4 and other one valent negative ion, and cocatalyst being organic compound YR3, where Y is group V element and R3 is C2-C12 alkyl or aryl, with the molar ratio between the main catalyst quadridentate schiff base aluminum complex and the cocatalyst being 0.05-1. The catalyst can catalyze the reaction of epoxy compound with Co2 to synthesize cyclic carbonate and catalyze the exchange reaction of cyclic carbonate with methoxide to synthesize methyl carbonate in high efficiency.

Relating to the technical field of demoulding agent production, the invention discloses a building template demoulding agent for concrete pouring. The building template demoulding agent is prepared from the following raw materials by weight: 40-45 parts of modified silicone oil, 15-20 parts of polypropylene oxide glycol 2000, 8-12 parts of C9 petroleum resin, 6-10 parts of volcanic ash, 5-8 parts of sepiolite powder, 5-8 parts of ethylene-tetrafluoroethylene copolymer, 4-6 parts of toluene diisocynate, 3-5 parts of rapeseed cake, 2-3 parts of oleic acid polyoxyethylene ester, 2-3 parts of nano-alumina, 2-3 parts of glass fiber powder, 1-2 parts of tri-n-butyltin methoxide, 1-2 parts of sulfated castor oil, 10-15 parts of butyl acetate, and 10-15 parts of n-butanol. The demoulding agent provided by the invention can significantly improve the demoulding effect of concrete, prevents concrete from adhering to the template during demouling and protects the template and concrete surface structure. At the same time, the demoulding agent has no corrosion on the template, thus fully extending the service life of the template.

A description is given of a process for preparing methyl formate by reacting excess methanol with carbon monoxide under superatmospheric pressure and at elevated temperature in the presence of alkali metal methoxide or alkaline earth metal methoxide as catalyst in a pressure-rated reactor, in which the use of at least two reactor elements, preferably operated in countercurrent, at about 100° C. and a pressure of about 100 bar in combination with a solids-free desalting of the reaction product makes possible very economical, largely trouble-free production of methyl formate in any desired quality and with a very good production capacity.Furthermore, the process for solids-free desalting and apparatuses for carrying out this process are described.

The invention discloses a preparation method of esomeprazole and a magnesium salt thereof. The preparation method comprises the steps: with 4-methoxy-2-hydroxymethyl-3,5-dimethyl pyridine as raw material, carrying out a reaction with hydrobromic acid to obtain 4-methoxy-2-bromomethyl-3,5-dimethyl pyridine, namely a compound II; dripping a methanol solution of the compound II into a methanol solution of a compound III, and carrying out a reaction to obtain 5-methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl thio-1H-benzimidazole, namely a compound IV; dissolving the compound IV in dichloromethane, adding D-diethyl tartrate, tetrabutyl titanate and water for reaction, and thus obtaining esomeprazole; and carrying out a reaction of esomeprazole with magnesium methoxide to obtain magnesium esomeprazole. The method is utilized to prepare esomeprazole and the magnesium salt thereof, and can effectively reduce the production cost.

A process for preparing 3-methyl methoxypropionate includes proportionally adding methanol and sodium (or potassium) methoxide as catayst to reactor, stirring while reaction, adding MA, continuous reaction, cooling, stirring while adding concentrated sulfuric acid (or phosphonic acid ) to neutralize catalyst, and refining.

Related are a chemical warfare agent (CWA) decontaminant, a method of decontaminating a CWA using the CWA decontaminant, and a product including the CWA decontaminant. The CWA decontaminant may include a metal-organic framework (MOF) including at least one metallic compound among metal hydroxide, metal hydride, metal acetate, metal methoxide, and metal oxide, and the at least one metallic compound may be dispersed either on a surface of the MOF or in pores of the MOF, or both.

The invention discloses an isotope labeling reagent which is an isothiocyanopyrimidine isotope labeling reagent with a chemical name of [d0] / [d6]-4,6-dimethoxine-2-isothiocyanate. The preparation method of the reagent comprises the following steps of: firstly, reacting 4,6-dichloro-2-amiopyrimidine with sodium methoxide / deuterosodium methoxide to obtain a [d0] / [d6]-4,6-dimethoxy-2-amiopyrimidine crude product; carrying out reflux reaction on the obtained crude product, thiophosgene and sodium bicarbonate to obtain a final crude product; and then carrying out column chromatography to obtain the isotope labeling reagent disclosed by the invention. The isotope labeling reagent disclosed by the invention can be applied to the identification analysis of polypeptide N-end residues and the quantitative analysis of protein, can speed up the labeling reaction rate and improve a signal of the labeled peptide section, is beneficial to strengthening the accuracy and the credibility of the identified peptide section and has the advantages of less molecular weight of the labelled part, relative simple structure, stable performance, simpleness and convenience for operation, and the like.

The mesoporous silicon dioxide material has mesopore diameter of 3.5-4.0 nm, pore volume of 0.80-1.1 cu cm / g and specific surface area of 372.9-836.8 sq cm / g,. The material is one kind of latent industrial catalyst carrier. The preparation process has dioctadecyl dimethyl ammonium chloride as template agent and ethyl silicate as silicon source, and under alkaline condition, white precipitate is prepared and refluxed in methanol / hydrochloric acid solution to eliminate surfactant. The preparation process is simple, novel, low in surfactant amount and environment friendly, and opens one way for the application of double alkyl chain quaternary ammonium salt surfactant in material and catalyst field.

A process for the preparation of cefoxitin of formula (I)The process includes treating the compound of formula (II)with a halogenating agent in an organic solvent, followed by treatment with alkali / alkaline earth metal methoxide at a temperature in the range of −100° C. to 0° C. The product formed is then isolated as an organic amine salt of the formula (III),The salt of formula (III) is treated with a base in the presence of solvent at a temperature in the range of −75 to 10° C., the product formed is isolated as an organic amine salt of the formula (IV)The compound of formula (IV) is carbamoylated with isocyanate of formula (V)RNCO  (V)in the presence of a solvent at a temperature in the range of −60° C. to 10° C., and isolating to get cefoxitin of the formula (I).

This invention relates to a synthetic method of fatty acid methyl ester, belongs to organic chemistry esters compounds synthesis technical fields. It takes fatty acids and methanol as raw materials. Their characteristics lies in the role of a catalyst under refluxed reaction to obtained fatty acid methyl ester, and then distilling out excess methanol; fatty acid is Lauric acid or oleic acid; catalytic agent is one of the p-toluenesulfonic acid, sodium methylatesodium methoxide, sodium hydroxide, etc, and the amount of it account for 0.2 to 1.0 percentage of total weight of fatty acid and methanol; molar ratio of fatty acids and methanol is 1:5.0 to 10.0.

A method for making a hindered phenolic antioxidant based on Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate uses a methanol solution containing alkali metal methoxide as a catalyst solution, wherein the catalyst solution is filtered with a filter device with a filter pore diameter of less than 50 μm to remove insoluble matters therefrom before used in a transesterification process where methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and 1-Octadecanol are taken as reactants to obtain a crude product of Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate having high conversion rate and low color, and the crude product further undergoes a purification process for crystallization, filtering and drying to obtain a product of Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate having high purity and low color.

The invention provides a synthetic method for obtaining high-purity GHK copper peptides. According to the method, the post-treatment meanses of complexing GHK tripeptides with a copper complexing agent, performing filtering, preforming rotary drying, performing freeze drying and the like are taken, and high-purity GHK copper peptides can be obtained. The obtained copper complexing agent is selected from one or a mixture of two of copper acetate, copper hydroxide and copper methoxide. The synthetic method mainly has the advantages that compared with a conventional synthetic method, the synthetic method is simpler to operate and lower in cost, application of resins is avoided, the GHK copper peptide products being high in purity, high in yield and qualified and stable in sample parameters can be obtained, and the synthetic method can be applied to mass production.

This invention is an ambient temperature method to strip cured paint from low temperature threshold plastic substrates; in addition, this novel method can be utilized to strip wood, steel, aluminum, brass, magnesium and non-ferrous substrates. A paint stripping composition based on a unique mixture of Boron methoxide, at least one alcohol, at least one surfactant and at least one evaporation inhibitor, at least one alkaline or acid activator and at least one additive and may contain at least one co-solvent and may be utilized as-is, water thin, in an immersion tank or thickened and applied by spray, brush or roller. More specifically, a paint stripping process invented to salvage, recover and recycle reject or sometimes called rework painted production parts, in-tact, without adversely affecting the parts substrate and form.

The invention discloses an antioxidation slag removal agent for the welding of metal materials, and belongs to the technical field of welding materials. The slag removal agent comprises the following components in percentage by mass: 30 to 70 percent of rare-earth additive, 5.0 to 25 percent of methoxide, 2.5 to 5.0 percent of ethyl acetate and 10 to 40 percent of cosolvent. The slag removal agent has the advantages of improving the physicochemical performance and mechanical strength of an alloy, enhancing the weldability and electrical conductivity of metals, along with a good slag removal effect, and is convenient to use.

The invention relates to a liquid hardening agent with high wear resistance and a preparation method thereof. In terms of 100% of the mass of the hardening agent, the liquid hardening agent is prepared from the following raw materials: 50-90% of silicate ester, 1-30% of aluminum salts, 1-30% of alcohol and 1-5% of a catalyst, wherein the silicate ester is selected from one or a combination of more of methyl silicate, ethyl silicate, tri(methyl silicate), and preformed polymer of methyl silicate and ethyl silicate; the aluminum salt is selected from one or a combination of more of aluminum chloride, aluminum nitrate, aluminum chlorohydrate, polymer aluminum nitrate, aluminum formate, aluminum acetate, aluminum methoxide, aluminum ethylate and aluminum isopropoxide. According to the liquid hardening agent, silicate ester and the aluminum salt are adopted as the main ingredients, so that the content of the active ingredients is higher than that of a common water-based product, and the permeability is extremely high, and therefore, the hardness and wear resistance of cement can be remarkably improved. Meanwhile, the preparation method is simple and is beneficial to reduction in the industrial production cost.

The invention relates to a catalyst for block polyether synthesis and application thereof to block polyether synthesis. The invention mainly solves the technical problem of wide distribution of the molecular weight of the block polyether in the prior art. The catalyst for block polyether synthesis comprises the following component in part by mole: 1 part of alkaline compound and 0.1 to 2 parts of crown ether, wherein the alkaline compound is selected from any one of alkali metal hydroxide, alkaline earth hydroxide, alkali metal oxide, alkali metal methoxide or alkali metal ethoxide; and the crown ether is selected from at least one of 18-crown ether-6 or benzo 18-crown ether-6. By adoption of the technical scheme, the technical problem is solved well and the catalyst can be applied to industrial production of the block polyether with narrow molecular weight.

The invention discloses a vapor-phase corrosion inhibition antirust agent containing 1,2-methylimidazole. The vapor-phase corrosion inhibition antirust agent comprises the following raw materials in parts by weight: 85-95 of casator oil, 1-2 of ferrocene, 0.5-1.4 of polyisobutylene, 0.9-1.2 of benzoic acid monoethanolamine, 0.4-0.9 of soidum methoxide, 0.9-1.6 of sodium dihydrogen zinc phosphate, 1-1.6 of 1,2-methylimidazole, 0.9-1.8 of triethanolamine, 0.7-1.3 of benzotriazole, 1-1.5 of zinc dialkyl dithiophosphate, 0.9-1.9 of sodium dodecylbenzene sulfonate, 5-6 of film-foaming resin and 1-2 of modified attapulgite. The vapor-phase corrosion inhibition antirust agent has excellent contact anti-rust performance and a very good vapor-phase anti-rust effect for steel and brass.

The process of synthesizing ethyl amidine hydrochloride includes: setting acidyl methoxide into synthesizing kettle, dropping acetonitrile, maintaining at 15-30 deg.c for 4-6 hr before lowering the temperature to -5 deg.c to 20 deg.c, adding amido alcohol, stirring to react, cooling after reaction and discharging, solid-liquid separation, concentrating and centrifugally separating to obtain ethyl amidine hydrochloride. The synthesizing kettle is provided with a valve in the discharge port for measuring temperature, and the concentrating kettle is provided with a stirrer for favoring heat transfer and mass transfer. The present invention has optimized aminating condition, less reaction step, simplified reaction apparatus, high yield and high product quality.

The invention discloses a method for preparing cyclopropylamine midbody cyclopropanecarboxylic acid methyl ester. First in a sealed reaction kettle, methanol is added dropwise into calcium carbide, togenerate calcium methoxide and acetylene; gamma-chloro methyl butyrate is added into calcium methoxide at 60-120 DEG C, the temperature is controlled to be constant in the reaction process, methanolgenerated in the process is collected, and the cyclopropanecarboxylic acid methyl ester is obtained through distillation. The method is simple in process, types of raw materials necessary for production are fewer, some of the raw materials can be reused, the yield is high, the quality is good, and the method is safe and environmentally friendly.

The invention relates to a method for preparing boron-10 acid with boron-10 trifluoride. The method includes following steps: carrying out a reaction between the boron-10 trifluoride and calcium methoxide to obtain trimethyl borate-10 with absolute methanol being a solvent; carrying out a solid-liquid separation process to a reaction product; performing hydrolysis to a liquid mixture to obtain the boron-10 acid. The method is divided into two processes: an esterification process and a hydrolysis process, wherein methanol is used as the solvent and a reaction is carried out between the boron-10 trifluoride and the calcium methoxide to obtain the mixture composed of the trimethyl borate-10 and the methanol in the esterification process. The reaction product is subjected to a distillation process with a distillate being subjected to hydrolysis to obtain a mixed solution composed of boric acid, methanol and water. A condensation process and a crystallization process to obtain the boron-10 acid. A solid by-product obtained after the distillation is single in content, wherein a main component in the solid by-product is calcium fluoride. A yield of the boron-10 acid is more than 95.2% through the method and a purity of the boron-10 acid is more than 99.7% after the boron-10 acid being detected through a detection method in GBT12684-2006.

The invention relates to the technical field of external medicine compositions for pets, in particular to a deodorization spray for pets and a preparation method thereof. The deodorization spray for pets is prepared from, by weight, 3-10 parts of composite biological enzyme, 0.01-20 parts of surfactant, 5-20 parts of plant extract, 0.01-5 parts of plant essential oil and 55-95 parts of pure water. The deodorization spray for pets has the three highlights of bacteriostasis, deodorization and mild parasite expelling; compared with existing products on the market, the deodorization spray has the advantages that the deodorization spray is good in antibacterial effect, the removal rate of escherichia coli, pseudomonas aeruginosa and staphylococcus aureus can reach 99%, the deodorization effect is better, and the removal rate of hydrogen sulfide, sulfur methoxide and ammonia in dog excrement can reach 86% or above; by adopting the non-toxic harmless compound biological enzyme, the natural plant extract without special peculiar smell, the surfactant with a good sterilization effect and the mild essential oil with an insect expelling effect, the pet deodorant is easier to accept by pets while effectively inhibiting bacteria and deodorizing, cannot cause pet stress reaction, is stable in chemical property, has no side effect, meets the requirements of environmental protection, and is suitable for popularization and application.

The invention discloses a Melphalan intermediate and a preparation method thereof. The Melphalan intermediate is prepared by acidifying a compound p-nitrobenzaldehyde under the action of methanol, a hydrochloric acid solvent, etc. The preparation method has a route with mild reaction conditions, is higher than an existing preparation method in yield, is economical and effective, and is suitable for large-scale industrial production. The synthesis route is as shown in the description.