7 results about "Perbenzoic acid" patented technology

This invention discloses a method for the continuous synthesis of benzoic acid from sodium benzoate mother liquor, comprising the following steps: (1) continuously pumping sodium benzoate mother liquor into a high-temperature acidification kettle, adding hydrochloric acid dropwise, controlling the pH value to 1~2, and the reaction temperature to 97~100℃; (2) overflowing the acidification mother liquor into a cooling kettle #1 to reduce the temperature to 70~80℃; (3) overflowing part of the acidification mother liquor in the cooling kettle #1 into a dispersion kettle as a dispersion mother liquor, and overflowing part of the acidification mother liquor into a cooling kettle #2; reducing the temperature to below 40℃; adding crude benzoic acid to the dispersion kettle to increase the concentration of benzoic acid, and then returning it to the high-temperature acidification kettle; (4) centrifuging the acidification mother liquor in the cooling kettle #2 into a centrifuge and then discharging it into a crude benzoic acid buffer tank, part of the crude benzoic acid into the dispersion kettle, and the remaining crude benzoic acid dried and discharged to obtain the finished benzoic acid. This invention utilizes continuous high-temperature acidification of sodium benzoate mother liquor and increases the concentration of benzoic acid during high-temperature acidification, resulting in high-quality benzoic acid with high production efficiency.

The invention discloses a preparation method of a bumetanib injection, and belongs to the technical field of medicines. The method comprises the following steps: (1) preparing materials, namely respectively weighing bumetanib, xylitol, sodium dihydrogen phosphate dihydrate, disodium hydrogen phosphate dihydrate and benzoic anhydride modified polyoxyethylated castor oil according to prescription amounts for later use; (2) preparing a solution: weighing water for injection, adding xylitol, sodium dihydrogen phosphate dihydrate and disodium hydrogen phosphate dihydrate according to the prescription dosage in a stirring state, stirring and dissolving, then adding benzoic anhydride modified polyoxyethylated castor oil and bumetanib according to the prescription dosage, and stirring until the materials are completely dissolved; and (3) fixing the volume: supplementing the water for injection to the total amount of the prescription, and uniformly stirring and mixing. According to the bumetanib injection disclosed by the invention, the polyoxyethylated castor oil is modified by benzoic anhydride, so that the dissolution rate of bumetanib is effectively improved, and meanwhile, the high-temperature and illumination stability of the bumetanib injection is remarkably enhanced.

Disclosed herein are methods for oxidative catalytic depolymerization of polystyrene (PS) can produce benzoic acid, but the annual consumption of benzoic acid is about 40 times lower than PS. For this catalytic oxidation method to be a viable means to manage PS waste, benzoic acid should be converted to higher-volume chemicals. We demonstrate a hybrid chemical and biological process that uses PS as feedstock for production of adipic acid, a high-volume co-monomer for nylon 6,6 via benzoic acid. Mn / Br co-catalyzed autoxidation of PS to benzoic acid proceeds with a yield of up to 94% in a solvent mixture of benzoic acid and water. The PS-derived benzoic acid undergoes bioconversion at near-quantitative yield to muconic acid, which is readily converted to adipic acid through catalytic hydrogenation.

The invention discloses an organic-inorganic hybrid early-strength polycarboxylate superplasticizer and a preparation method thereof, and the organic-inorganic hybrid early-strength polycarboxylate superplasticizer comprises the following components: a modified polyether monomer, methyl allyl polyoxyethylene ether, deionized water, a hydrogen peroxide solution, acrylic acid, a reducing agent, a chain transfer agent, a sodium hydroxide solution, modified graphene oxide, modified cellulose and modified fly ash, the invention relates to the technical field of polycarboxylate superplasticizers. Methyl allyl polyoxyethylene ether is modified through benzoic anhydride, so that the adsorption capacity of methyl allyl polyoxyethylene ether on the surfaces of cement particles is enhanced, and compared with unmodified methyl allyl polyoxyethylene ether, modified molecules can be more effectively combined with active sites on the surfaces of the cement particles through new functional groups of the modified molecules, so that the adsorption capacity of the modified molecules on the surfaces of the cement particles is improved. Therefore, a more stable adsorption layer is formed, the polycarboxylic acid water reducer can play a better dispersion role, and cement particles can be kept in a better dispersion state.

The application discloses sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants. Modified sodium lignosulfonate is obtained by esterification of sodium lignosulfonate with benzoic anhydride. The esterification reaction reduces the hydrophilicity of the sodium lignosulfonate and improves the hydrophobicity. Then, the surface of the sodium lignosulfonate is coated with titanium dioxide through hydrophobic self-assembly and hydrothermal treatment, so that a porous and rough structure is obtained. The rough structure can improve the anchoring capacity on the leaf surface, and the porous structure can disperse the shear force of rainwater washing and avoid the rainwater washing from falling off the leaf surface. The sulfonic acid group can increase photo-generated carriers, improve the separation efficiency of photo-generated electrons and holes, improve the absorption rate of titanium dioxide to ultraviolet light, and effectively adsorb and combine water molecules due to the strong polarity of the sulfonic acid group, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignosulfonate nanosphere is promoted, and a titanium dioxide coating layer is formed through condensation.

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 invention discloses a sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants, sodium lignin sulfonate is esterified through benzoic anhydride to obtain modified sodium lignin sulfonate, the hydrophilicity of the sodium lignin sulfonate is reduced through esterification reaction, the hydrophobicity is improved, and the pesticide adhesion is improved. Then titanium dioxide is coated on the surface through a hydrophobic self-assembly effect and hydrothermal treatment to obtain a porous and coarse structure, the coarse structure can improve the anchoring capability on the leaf surface, and the porous structure can disperse the shear force of rain wash to prevent the shear force applied to the leaf surface from falling off by rain wash; the sulfonic acid group can increase photon-generated carriers, improve the separation efficiency of photo-generated electrons and holes and improve the absorption rate of titanium dioxide to ultraviolet light, and the strong polarity of the sulfonic acid group can effectively adsorb and combine water molecules, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignin sulfonate nanosphere is promoted, and the photocatalytic activity of the porous sodium lignin sulfonate nanosphere is improved. And condensing to form a titanium dioxide coating layer.