47 results about "Potassium ethoxide" patented technology

A method of preparing a bis(thio-hydrazide amide) disalt includes the steps of combining a neutral bis(thio-hydrazide amide), an organic solvent and a base to form a bis(thio-hydrazide amide) solution; and combining the solution and methyl tert-butyl ether, thereby precipitating a disalt of the bis(thio-hydrazide amide). In some embodiments, a method of preparing a bis(thio-hydrazide amide) disalt includes the steps of combining a neutral bis(thio-hydrazide amide) and an organic solvent selected from methanol, ethanol, acetone, and methyl ethyl ketone to make a mixture; adding at least two equivalents of a base selected from sodium hydroxide, potassium hydroxide, sodium methoxide, potassium methoxide, sodium ethoxide and potassium ethoxide to the mixture, thereby forming a solution; and combining the solution and methyl tert-butyl ether to precipitate the disalt of the bis(thio-hydrazide amide). The disclosed methods do not require lyophylization and the solvents used in the process can be more readily removed to low levels consistent with pharmaceutically acceptable preparation.

A preparation method of conjugated linoleic acid glycerides comprises the following steps: (1) C1-4 sodium alcoholate/potassium alcoholate is taken as a catalyst, linoleic acid short-chain alcohol ester is prepared to be conjugated linoleic acid short-chain alcohol ester through inversion reaction for 1-8 hours at 90-150 DEG C, and the using amount of the catalyst is 1.5-8.0% of weight of the linoleic acid short-chain alcohol ester; (2) sodium methylate/potassium methylate and sodium ethoxide/potassium ethoxide are taken as catalysts, the conjugated linoleic acid short-chain alcohol ester and acetoglyceride with mole ratio being 3:1-3.5:1 are reacted for 3-10 hours at 100 DEG C and 170 DEG C to prepare the conjugated linoleic acid glycerides, and the using amount of the catalysts is 0.8-10% of the weight of acetoglyceride. According to the preparation method, the natural resources are utilized sufficiently, an organic solvent is not needed in the main reaction; the esterification rate of conjugated oil acid is more than 99%; the reaction time is short, and the postprocessing simple; the triglyceride content of the conjugated linoleic acid glycerides is more than 90%, and the acid value of the conjugated linoleic acid glycerides is under 1.0mgKOH/g; and the conjugated linoleic acid glycerides is free from extraneous odor, good in taste and light in color, and the optimal Gar is less than or equal to 1.0.

Soluble polyphosphides were successfully generated in a number of organic solvents by a reaction between shelf-stable red phosphorus and potassium ethoxide or other nucleophilic activators. The species were identified by ³¹P-NMR in solution. The reaction was scaled up to gram quantities by using a flow-chemistry process.

The invention discloses a preparation method of a comb-type polymer phase change energy storage material. The preparation method comprises the following steps: firstly, dissolving polymers such as dried poval and the like in a solvent the amount of which is 2-4 times that of the polymers, and then carrying out metallization reaction on the mixture and one of calcium hydride, sodium hydride, potassium hydride, sodium methoxide, sodium ethoxide, potassium methoxide or potassium ethoxide; stirring and reacting for 1-4 hours in the solvent at the temperature of 30-60 DEG C so as to obtain a polymer metalized product with an active group; adding at leas one of 1-halognated n-alkanes, wherein the molar ratio of the 1-halognated n-alkane to the polymers such as poval and the like is (0.1:1)-(6:1), and the adding speed is controlled at 1-10mL/min; adding a catalyst the weight of which is 0.01-1% of that of the polymers such as poval and the like; and stirring and carrying out grafting reaction for 4-12 hours in the solvent at the temperature of 30-90 DEG C; and washing the obtained product for impurity removal and drying, so as to obtain the comb-type polymer phase change energy storage material.

The invention relates to a synthesis process of an important pharmaceutical chemical intermediate 4-nitroindole. The synthesis process consists of: under the catalysis of p-toluenesulfonic acid, reacting 2-methyl-3-nitroaniline with triethyl orthoformate to produce N-(2-methyl-3-nitrophenyl)ethoxy methylenimine, then reacting the N-(2-methyl-3-nitrophenyl)ethoxy methylenimine with potassium ethoxide and diethyl oxalate to generate 4-nitroindole, then carrying out recrystallization and vacuum sublimation, thus obtaining a light yellow product, i.e. the 4-nitroindole. And the total yield is about 35%.

The invention relates to an electroplating wastewater treatment agent and a preparation method thereof. The treatment agent comprises the following components in parts by mass: 3-8 parts of calcium hydroxide, 1-5 parts of polyacrylamide, 2-6 parts of sodium phosphate, 0.5-3.5 parts of triethanolamine oleate soap, 2-5 parts of sulfonated coal tar, 0.3-1 part of chlorine dioxide, 1-4 parts of aluminum sulfate, 0.7-1.8 parts of potassium ethoxide, 0.2-0.7 part of barium sulfate, 1.3-3.2 parts of sodium sulfide, 0.1-0.6 part of ethylene diamine tetra(methylene phosphonic acid), and 0.1-0.6 part of isoascorbic acid. The electroplating wastewater treatment agent provided by the invention can effectively remove oil stains, iron rust, cyanides, free acids, heavy metals and other substances in electroplating wastewater, is convenient to use, is used for assisting treatment of wastewater produced at different stages of electroplating, and can make the concentration of Zn<2+>, Cr<3+> and Fe<3+> in the wastewater drop to less than 4.5 mg/L from 200 mg/L.

The invention discloses a method for chemically synthesizing potassium sodium niobate nano-powder, comprising the following steps of mixing sodium ethoxide (NaOCH2CH3), potassium ethoxide (KOCH2CH3) and columbium ethoxide (Nb[OCH2CH3]5) by the following stoichiometric ratio of Na0.5K0.5NbO3; and hydrolyzing in a micro-emulsion, carrying out heat treatment, and finally preparing the potassium sodium niobate nano-powder with the grain dimension less than 20 nanometers. The potassium sodium niobate nano-powder prepared by the method has fine grain and uniform distribution of grain size and meets the requirement of different electronic ceramic fields; and the method is simple, energy-saving and exhaust-reducing, has low cost and is suitable for batch production.

The present invention provides a new topiroxostat synthesis intermediate 4-(2-(imino(pyridine-4-yl)methyl)hydrazinocarbonyl)pyridine N-oxide (compound VI) and a preparation method thereof, wherein isoniazid N-oxide IV and 4-cyanopyridine V are subjected to a reaction in a suitable solvent under an alcohol alkali condition to obtain the product, the alcohol alkali is selected from sodium methoxide, sodium ethoxide, potassium ethoxide or potassium t-butoxide, and the reaction formula is defined in the specification. According to the present invention, through the compound VI, the gout treating drug topiroxostat can be prepared under the mild and easy industrial control reaction conditions.

The invention discloses a method for cooperatively reducing odor of polyether glycol through a catalyst and photo-catalytic oxidation. According to the method disclosed by the invention, firstly, the polyether glycol is synthesized by adopting a specific binary compound catalyst containing potassium ethoxide and zinc glutarate and a chemical reaction speed is improved. Meanwhile, in a post-treatment process of a product, a titanium dioxide photo-catalytic oxidation aldehyde substance is adopted and is used for cooperatively reducing the concentration of low molecular weight aldehyde substances, so that the aim of reducing the odor of the polyether glycol is realized. The polyether glycol prepared by the method is characterized in that the content of low molecular weight aldehydes including free formaldehyde, acetaldehyde and the like is low, the quality of the product is stable and the utilization performance is good.

The invention provides an automobile protective device material and a preparation process thereof. The automobile protective device material provided by the invention is formed by the following raw materials in parts by weight: 400 to 4000 parts of reinforced fiber, 1000 parts of caprolactam, 0.001 to 10 parts of an activating agent and 0.002 to 10 parts of a catalyst, wherein the activating agent is isocyanate and/or imide derivatives; and the catalyst is selected from one or more of sodium hydroxide, sodium methoxide, potassium methoxide, potassium ethoxide, sodium ethoxide, caprolactam, caprolactam magnesium bromide, caprolactam magnesium chloride, double caprolactam magnesium, sodium hydride, potassium hydride, potassium hydroxide and a Grignard reagent. The protective device material provided by the invention has the protective property capable of meeting the protection requirement on the basis of realizing light weight, and also has high reusability after being wasted. The preparation process provided by the invention is simple and practical, thereby facilitating large-scale production.

The invention relates to an improved formula for electroplating wastewater treatment. The formula includes, by weight percentage, 23-26 parts of calcium oxide, 3-8 parts of calcium hydroxide, 11-15 parts of activated alumina, 1-5 parts of polyacrylamide, 21-28 parts of persulfate, 0.1-0.6 part of isoascorbic acid, 6-15 parts of oxidizing agent, 0.1-0.6 part of fresh ginger extract acid, 5-8 partsof insoluble starch xanthate, 1.3-3.2 parts of sepiolite powder, 9-14 parts of active diatomaceous earth, 0.2-0.7 part of barium sulfate, 6-12 parts of basic catalyst, 0.7-1.8 parts of potassium ethoxide, 3-6 parts of polydimethylsiloxane di-quaternary ammonium salt, 1-4 parts of aluminum sulfate, and 2-4 parts of potassium borohydride. The improved formula for electroplating wastewater treatmenthas the advantages that a prepared electroplating wastewater treatment agent can effectively remove oil strains, rust, cyanide, free acid, heavy metals and the like in electroplating wastewater, is convenient to use, and can be used for auxiliary treatment of wastewater generated in various stages of electroplating.

The invention provides a morpholine dehydration auxiliary agent, and a preparation method and an application thereof, and belongs to the technical field of auxiliary agents. The dehydration auxiliaryagent is a mixed solution formed with water as a solvent and taking one or more of sodium hydroxide, potassium hydroxide, sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, sodium tert-butoxide and potassium tert-butoxide as active components. The invention also provides a preparation method and application of the dehydration auxiliary agent. The dehydration auxiliary agent is used for dehydrating morpholine in an extraction layering manner: mixing the dehydration auxiliary agent with morpholine mother liquor, and standing the mixture for layering an oil phase and a water phase. When the dehydration aid is used for dehydrating morpholine, water in morpholine can be removed from 20% to 1% or below. A dehydration auxiliary agent is adopted to replace a traditional rectification method for dehydration, energy consumption is reduced by 50% or above, and dehydration time is shortened by 50% or above.

The invention relates to a preparation method of amisulpride, which comprises the steps of carrying out condensation reaction on 4-amino-2-methoxy-5-ethyl sulfonyl methyl benzoate, N-ethyl-2-aminomethylpyrrolidine and a solvent at the temperature of 50-100 DEG C under the condition of taking organic alkali as a catalyst, and after the reaction is finished, concentrating the reaction liquid to remove the solvent, and filtering and drying to obtain the amisulpride. The organic alkali is sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, sodium isopropoxide, potassium isopropoxide, potassium tert-butoxide or sodium tert-butoxide, and the specific synthetic route is shown in the description. By adopting the preparation method disclosed by the invention, a catalyst harmful to the environment is not used in the reaction process, the post-treatment is simple, the solvent is a common recyclable solvent, the yield reaches 90% or above, the purity can reach 99.7%, the single impurity content is less than 0.1%, the requirements of medicinal preparations are met, and the preparation method is suitable for industrial production.

The invention provides a swainsonine derivative and a preparation method of a research reagent of the swainsonine derivative. The swainsonine is prepared through the following synthesis steps: a, adding chloroacetic acid and potassium hydroxide by taking swainsonine as a raw material and taking water as a solvent; b, feeding hematoporphyrin into thionyl chloride, and then adding cordycepin; and c, pouring the product obtained in the step a into the product obtained in the step b, and dropwise adding newly prepared potassium ethoxide into the obtained mixture, so that a swainsonine derivative solution is obtained. The swainsonine derivative disclosed by the invention is a product derived on the basis of a swainsonine structure, and by comparing, the difference is as follows: an enriched heterocyclic ring is connected, so that the swainsonine derivative disclosed by the invention has a function of enriching cancer cells, and can allow drugs to tend to parts with tumors but allow the drug concentration of other parts to be little.

The invention relates to a method for producing safe and environment-friendly carbonic ester series mixed solvents. Raw materials of dimethyl carbonate and an initiator in the presence of a catalyst are subjected to a transesterification. The initiator comprises a first initiator, which is at least one selected from the group containing ethanol, isopropyl alcohol, isobutyl alcohol, n-butyl alcohol, glycol, diglycol and glycerol, and a second initiator, which is least one selected from the group consisting of ethyl acetate, isopropyl acetate, SEC-butyl acetate and isobutyl acetate. The catalyst comprises a first catalyst, which is at least one selected from the group consisting of sodium methoxide, sodium ethoxide, potassium methoxide, potassium ethoxide, triethanolamine and polyethylene glycol, and a second catalyst, which is at least one selected from the group consisting of dibutyltin oxide, tetrabutyl titanate, rare earth salt and rare earth oxide. The through selection of catalyst and initiator, the invention uses an ester exchange method to obtain carbonic ester series solvents with different boiling points, which can be used as green and environment-friendly coating solvents.

The invention discloses a synthesis method of a nevirapine intermediate 2-amino-3-nitro-4-methylpyridine shown as the chemical formula I. The synthesis method includes steps: under catalysis of inorganic base or organic base and actions of concentrated sulphuric acid and dilute nitric acid, subjecting the 2-amino-3-nitro-4-methylpyridine shown as the chemical formula I to nitration reaction in organic solvent. The inorganic base can be calcium hydroxide, barium hydroxide, sodium hydroxide or zinc hydroxide; and the organic base can be sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, sodium tert-butoxide or potassium tert-butylate. The invention further discloses a synthesis method of a nevirapine intermediate 2-chloro-N-(2-chloro-4-methylpyridin-3-yl)nicotinamide. The synthesis method is easy and safe in operation, high in yield, low-cost, low in pollution to environments and suitable for industrial production in scale.

The invention relates to a treatment agent used for removing polychlorinated dibenzofuran in waste incineration tail gas. The treatment agent is prepared from taraxasterol acetate, potassium ethoxide,4-aminoisoquinoline, oleanolic aldehyde, phytolaccoside, 4-acetoxy-3-methoxy-(2-propenyl) benzene, 1,4-Dimethyl-piperazine, hydroxypropyl bi(trimethyl ammonium diiodide), 3-oxo-olean-12-en-28-oic acid. Combination capacity of the treatment agent with target substances is high, complex precipitate formation speed is high, removing rate is as high as 99%, cost is low, using amount is small, application range is wide, and no environment influence is caused.

The invention relates to a modified titanium ore catalyst which is applied to preparation of ethylene, propylene and butene through CO or CO2 hydrogenation. The catalyst shows good CO hydrogenation performance after being treated and modified by potassium ethoxide and potassium tert-butoxide, the selectivity of low-carbon olefin is kept at 50% or above, and the olefin-to-alkane ratio (O/P) can reach 5.6. Potential economic value is realized.