12 results about "Sodium Phenolate" patented technology

The application belongs to the technical field of chemical industry, and particularly relates to a mixed cresol separation method, which comprises selective oxidation, filtration, neutralization, secondary filtration and rectification processes in sequence. The selective oxidation comprises: adding mixed cresol, sodium hydroxide, sodium methoxide, a solvent and a catalyst into an oxidation kettle, heating, and introducing oxygen for selective oxidation. In the selective oxidation step, sodium methoxide is added, which can react with water obtained in a salification reaction step (i.e. a reaction step of sodium hydroxide and mixed cresol to generate sodium phenate and water) to generate methanol and sodium hydroxide, thereby promoting the selective oxidation reaction and improving the yield.

This application discloses a photocatalytic method for dehydrogenating sodium cyclohexoxide, comprising the following steps: mixing sodium cyclohexoxide with a catalyst, and conducting a photocatalytic reaction under light irradiation to obtain sodium phenolate; the catalyst is selected from metal catalysts and / or supported metal catalysts; the metal catalyst is Rh metal particles; the supported metal catalyst is selected from at least one of Pt / TiO2, Pd / TiO2, Rh / TiO2, Rh / Al2O3, and Rh / C. The photocatalytic sodium cyclohexoxide dehydrogenation method provided in this application can achieve rapid hydrogen release from sodium cyclohexoxide without external heating, and has a faster response speed and a faster dehydrogenation rate compared to thermal catalysis. Furthermore, the photocatalytic sodium cyclohexoxide dehydrogenation method of this application can be carried out under sunlight, and the use of solar energy can effectively reduce the cost of sodium cyclohexoxide dehydrogenation, which is beneficial for its large-scale application.

The invention discloses a texturing process of a single crystal battery piece. The texturing process comprises the following steps: S1, performing pre-texturing treatment on a silicon wafer by adopting pre-texturing liquid; s2, texturing the silicon wafer by adopting texturing liquid; the prefabricated down liquid comprises polyvinylpyrrolidone and polyvinyl alcohol; the texturing liquid comprises inorganic alkali, a defoaming agent and a catalyst; the inorganic base is selected from at least one of sodium hydroxide and potassium hydroxide, and the defoaming agent is selected from at least one of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, diethylene glycol, triethylene glycol and tetraethylene glycol. The catalyst is selected from at least one of sodium 5-nitro-o-methoxyphenolate, sodium o-nitrophenolate and sodium p-nitrophenolate. A nucleating agent solution is adopted to carry out texturing pretreatment on a silicon wafer, then alkali treatment texturing is carried out on the silicon wafer, and the liquid changing period of the texturing process is long; and the cell pieces prepared by taking the polyvinylpyrrolidone and the polyvinyl alcohol as the combined nucleating agent are relatively small in inter-piece color difference.

The application relates to the technical field of phosphazene flame retardants, and particularly discloses a high-performance low-cost phosphazene flame retardant and a preparation method thereof. The method comprises the following steps: first, purifying an industrial by-product mixed sodium phenate to obtain anhydrous mixed sodium phenate; then, under the action of a nucleophilic substitution promoter composed of an alkaline compound and a polar aprotic solvent, step-by-step nucleophilic substitution reaction is carried out by controlling feeding sequence, reaction temperature and other conditions; after the reaction is completed, high-purity phosphazene flame retardant products are obtained through vacuum concentration and water washing precipitation; meanwhile, unreacted sodium phenate and solvents are recycled and reused; and a complete green closed-loop production process is constructed. Through the unique promoter system and process design, the application effectively coordinates the reaction activities of different components in the mixed sodium phenate, inhibits side reactions, significantly reduces the cost of raw materials, ensures excellent thermal stability and flame retardant efficiency of the products, realizes near-zero emission and maximization of resource utilization, and has an outstanding industrial application prospect.

The application provides a high-efficiency humidity-controlling energy-saving building material, a preparation method and application thereof, and the preparation method comprises the following steps: step one, preparing a porous substrate; step two, immersing the porous substrate in a humidity-controlling solution for a period of time, and taking out the porous substrate to obtain the high-efficiency humidity-controlling energy-saving building material, wherein the humidity-controlling solution comprises a humidity-controlling composition, the humidity-controlling composition comprises at least three kinds of light metal salts and one other kind of substance, the light metal salts are selected from calcium chloride, copper sulfate, potassium citrate, sodium malate, sodium citrate, sodium phenolate, ammonium chloride, potassium chloride, ammonium lactate, potassium carbonate, lithium bromide and sodium chloride, and the other kind of substance is selected from xanthan gum, silicon dioxide, sodium polyacrylate and sodium hexametaphosphate.

The invention relates to the field of sodium sulfite production, in particular to sodium sulfite and a refining method thereof.The method comprises the steps that S1, a sodium sulfite crude product is dissolved, solid impurities are removed, filtrate is obtained, and the sodium sulfite crude product comprises one or more of impurity sodium sulfate, sodium phenolate organic matter and solid impurities; s2, adjusting the pH value of the filtrate to be less than or equal to 9, then contacting with an extraction agent for extraction, and separating to obtain a water phase and an oil phase; s3, carrying out first concentration crystallization on the water phase, and carrying out solid-liquid separation to obtain a first crystal solid and a first crystal filtrate; s4, dissolving the first crystal solid, carrying out second cooling crystallization, and carrying out solid-liquid separation to obtain a second crystal solid and a second crystal filtrate; and S5, carrying out third crystallization water removal crystallization on the second crystallization solid, carrying out solid-liquid separation, washing to obtain a sodium sulfite wet finished product and a third crystallization filtrate, and drying the sodium sulfite wet finished product. The color and the purity of the sodium sulfite product can be improved, and the obtained product meets the industrial standard.

This invention discloses a method for preparing quinone compounds. The method comprises the following steps: in the presence of a base, a compound as shown in Formula II and a compound as shown in Formula III undergo a condensation reaction to obtain a quinone compound as shown in Formula I; wherein the base is more basic than sodium phenolate. This method is simple to operate and suitable for industrial production.

A preparation method of 4, 4 '-dinitrodiphenyl ether belongs to the field of organic synthesis, and comprises the following steps: step 1, weighing p-nitrochlorobenzene, sodium carbonate, a phase transfer catalyst and DMF according to a ratio; 2, mixing p-nitrochlorobenzene, sodium carbonate, a phase transfer catalyst and DMF, and carrying out a reaction; 3, filtering after the reaction is completed, and cooling filtrate to crystallize; 4, after cooling crystallization of the filtrate is completed, filtering and washing; and 5, drying to obtain the product 4, 4 '-dinitrodiphenyl ether. The synthesis method is simple to operate, p-nitrochlorobenzene is converted into 4, 4 '-dinitrodiphenyl ether by adding a proper phase transfer catalyst, sodium p-nitrophenolate is not used any more, the reaction risk is reduced, the reaction steps are shortened, impurities are few, the conversion rate is high, the purity is high, the production efficiency is improved, and the solvent DMF can be recycled and reused.

The invention relates to the technical field of solar cells, and particularly discloses a polishing additive for solving the problem of white spots in the pre-rough polishing process of a BC battery and a using method.The polishing additive is prepared from, by weight, 1.0%-10.0% of accelerant, 0.1%-5% of defoaming agent, 0.1%-0.5% of pH regulator, 0.01%-0.1% of surfactant and the balance deionized water; the accelerant is selected from one or a combination of more than two of sodium p-toluenesulfonate, perbenzoic acid, 2-nitroaniline, parachloronitrobenzene and sodium 2-methoxy-5-nitrophenolate; the accelerant is one or a combination of more than two of sodium p-toluenesulfonate, perbenzoic acid, 2-nitroaniline, parachloronitrobenzene and sodium 2-methoxy-5-nitrophenolate; by adopting an alcohol-free and phosphorus-free environment-friendly component design, the polishing additive obviously reduces the difficulty of subsequent sewage treatment while ensuring the efficient polishing performance, avoids the pollution of a traditional alcohol-containing and phosphorus-containing additive to the environment, effectively solves the problem that a silicon wafer is easy to generate white spots after a previous rough polishing process, and also has the advantages of simple process and low cost. And through an optimized surfactant and defoaming agent compounding technology, the surface flatness of the silicon wafer is further improved, and double breakthrough of environmental protection and performance is realized.

The utility model belongs to the technical field of fraction washing, and particularly relates to a mixed fraction washing system for tar distillation, which comprises an unwashed naphthalene oil tank, an alkaline sodium phenolate elevated tank, a primary continuous washing separation tower and a washed naphthalene oil tank, and is characterized by also comprising a secondary continuous washing separation tower and a dilute alkali elevated tank, the output end of the unwashed naphthalene oil tank and the output end of the alkaline sodium phenolate head tank are respectively connected with the input end of the primary continuous washing separation tower, and the upper oil phase output end of the primary continuous washing separation tower is connected with the input end of the primary dephenolization buffer tank; the output end of the dilute alkali overhead tank and the output end of the primary dephenolization buffer tank are respectively connected with the input end of the secondary continuous washing separation tower, and the oil phase output end of the secondary continuous washing separation tower is connected with the input end of the washed naphthalene oil tank. According to the utility model, a secondary dephenolization process is adopted, and the secondary continuous washing separation tower is additionally arranged to carry out secondary dephenolization on the naphthalene oil, so that the purity of the finished product naphthalene oil is greatly improved.

The invention relates to the field of preparation of p-hydroxyphenylglycine, in particular to a synthetic method of novel D-p-hydroxyphenylglycine. The synthesis method comprises the following steps: S1, adding D-tartaric acid into a methanol solution of D, L-p-hydroxyphenylglycine methyl ester, and reacting to obtain a mixed solution; s2, cooling and filtering the mixed solution obtained in the step S1 to obtain D-p-hydroxyphenylglycine methyl ester tartrate; s3, adding sodium carbonate and deionized water into the filtrate obtained in the step S2, reacting for 1-2 hours to obtain a reaction solution, and filtering to obtain D-sodium p-phenolate phenylglycine methyl ester tartrate; s4, combining the D-p-hydroxyphenylglycine methyl ester tartrate obtained in the step S2 and the D-sodium p-phenolate phenylglycine methyl ester tartrate obtained in the step S3, then adding into deionized water, uniformly stirring, and hydrolyzing; and S5, neutralizing the hydrolyzed solution obtained in the step S4, and slowly separating out a solid to obtain the D-p-hydroxyphenylglycine. The synthesis method disclosed by the invention is simple in preparation process, low in reagent cost, high in resolution rate and easy for industrial production, and can be quickly popularized and applied.

The invention relates to the technical field of metallurgical coking, in particular to a dephenolization washing pump front mixing pressurization process and system. According to the process, inert gas pressurization is carried out on a primary continuous washing separation tower and a secondary continuous washing separation tower, and a traditional normal-pressure self-flow extraction mode is changed into pressurized outflow. The method specifically comprises the following steps: respectively controlling oil-water separation interfaces of two towers through a neutral sodium phenolate flow regulating valve and an alkaline sodium phenolate flow regulating valve under a pressurization condition; and tower top extraction and liquid level sealing are controlled through a primary mixed part liquid level regulating valve and a washed mixed part liquid level regulating valve. The system comprises a pressurized separation tower, a gas supply pipeline, a regulating valve and an automatic control instrument, according to the invention, the separation interface and the extraction flow are automatically and accurately controlled, the adjustment sensitivity is obviously improved, meanwhile, equipment such as an alkaline sodium phenolate head tank is omitted, the process is simplified, the investment and operation cost is reduced, and the production efficiency and the control level are effectively improved.