5 results about "Aqueous sodium hydroxide" patented technology

Provided are high purity sodium p-styrenesulfonate with an excellent hue which is useful as a reactive emulsifier or dispersant for producing a polymer emulsion, or synthetic starch for clothing ironing and poly(sodium p-styrene-sulfonate) with an excellent hue using the same or sodium p-styrenesulfonate improved in fluidity while keeping good solubility.

An aqueous p-β-bromoethylbenzenesulfonic acid solution and an aqueous sodium hydroxide solution are reacted under specific conditions to control the particle size, thereby obtaining sodium p-styrenesulfonate particles improved in a balance between fluidity and solubility, and further, impurities such as isomers are reduced, thereby obtaining high-purity sodium p-styrenesulfonate with an excellent hue.

The invention belongs to the technical field of biochemical engineering and discloses a 1-carboxy alkyl-4-nitroimidazole preparation method and the application of the method. 6-bromohexanoic acid and thionyl chloride are mixed by a molar ratio of 1:1.5, and reflux reaction is carried out on the 6-bromohexanoic acid and the thionyl chloride, and compound methyl 6-bromohexanoate is prepared; 2-methyl-4- nitroimidazole and sodium hydride are dissolved in DMF by a molar ratio of 1:1.2, the compound 6-methyl 6-bromohexanoate with the same molar weight as the 2-methyl-4- nitroimidazole is added into the DMF to prepare 2-methyl-4-nitryl-1-(6-carboxyl hexyl) imidazate; the imidazate is hydrolyzed in a sodium hydroxide aqueous solution to prepare 1-carboxy alkyl-4-nitroimidazole. According to the method, the synthesis steps are simple and effective, the product is high in purity after being identified, and the requirement for immune research on nitroimidazole drugs of China can be met.

The invention provides a method for preparing an adhesive solution in a wet granulation process. The formula of the adhesive solution comprises 1.0-10.0 parts of sodium hydroxide, 24.8-50.0 parts of meglumine, 36.0-73.0 parts of poloxamer P407 and water, and the mass of the water is 19-60 times that of the poloxamer P407. The method comprises the following steps: firstly, respectively dissolving poloxamer P407 and sodium hydroxide with water to obtain a poloxamer P407 aqueous solution and a sodium hydroxide aqueous solution; and mixing the poloxamer P407 aqueous solution and the sodium hydroxide aqueous solution, adding meglumine into the mixture, and stirring the mixture to obtain an adhesive solution. The adhesive solution containing the poloxamer P407, the meglumine and the sodium hydroxide is obtained by the method, the solution is clear and transparent, and the dissolution end point of the solution is easier to judge when raw auxiliary materials or active drugs of other prescription components are subsequently dissolved, so that great convenience is brought to judgment of the dissolution end point.

The invention belongs to the technical field of preparation of functional materials, and particularly discloses a modified nano magnesium hydroxide flame retardant and a preparation method thereof.A silane coupling agent 702 is used as a modifier, and a sodium hydroxide aqueous solution and a magnesium chloride aqueous solution react to generate the modified nano magnesium hydroxide flame retardant in a microchannel reaction mode; after surface modification, part of mechanical properties of the modified nano magnesium hydroxide flame retardant are greatly improved, the modified nano magnesium hydroxide flame retardant has better dispersity, and the flame retardant property of the modified nano magnesium hydroxide flame retardant is excellent.

The invention discloses a preparation of silica-coated silver core composite particles. The preparation method comprises the following steps of mixing silver nitrate, ethanol and water, heating the mixed solution, adding polyvinylpyrrolidone into the mixed solution, then dropwisely adding a sodium hydroxide aqueous solution into the mixed solution for a reaction, after the reaction is finished, cooling to obtain a nano-silver particle-containing solution, adding ammonia water into the nano-silver particle-containing solution, then dropwisely adding tetraethoxysilane into the mixed solution for a reaction to obtain a composite particle-containing solution after the reaction is finished, filtering and washing the composite particle-containing solution to obtain composite particles, carrying out ultrasonic dispersion of the composite particles in water, heating the composite particles, adding polyvinylpyrrolidone into the composite particles for reactions of surfaces of the composite particles, cooling the reaction products, then dropwisely adding a sodium hydroxide aqueous solution into the reaction products for follow-up reactions, filtering, washing and drying to obtain the silica-coated silver core composite particles. The preparation method has simple processes, can be operated easily and has a high yield. The invention also discloses the silica-coated silver core composite particles. The silica-coated silver core composite particles have mesoporous structures having uniform sizes and shapes, have good controlled-release performances and antimicrobial activity and are especially suitable for preparation of antibacterial films.