122 results about "Benzoic anhydride" patented technology

A disinfectant with hydrogen peroxide bactericidal activity is composed of A, B, C and D component. If the solute is metered by 100%, its weight account proportion of mixed solution A:B:C:D=5-100:1-50:1-100:1-1000 obtained through hydrogen cation resin exchanged and filtered, wherein A is hydrogen peroxide; B is form one or more of glutaric anhydride, adipic anhydride, succinic anhydride, acetic anhydride, propionic anhydride, benzoic anhydride and phthalic anhydride; C is from one or more of sulfuric acid, phosphoric acid, salicylic acid, tartaric acid, citric acid, dipicolinic acid, sorbic acid, acetic acid, glutaric acid, oxalic acid, succinic acid, acetic acid, propionic acid, benzoic acid, and phthalic acid; D is from one or more of ethanol, ethylene glycol, isopropanol, glycerol, and polyvinyl alcohol. It is a good stability, strong bactericidal, fungicidal spectrum-efficient disinfectant.

The invention relates to a method for synthesizing phthalide catalyzed by benzoic anhydride in liquid phase, especially relates to method with loading nickel catalyst. Said method employs phthalide as reacting solvent, prepares phthalide through selective hydrogenation with benzoic anhydride under catalysis of loading nickel catalyst; the ratio by weight between said benzoic anhydride and phthalide is 1: 0.1-10, the reacting temperature is 130-200 Deg. C, reacting pressure is 1.0-5.0 Mpa; said loading nickel catalyst is catalyst with nickel loaded on SiO2, diatom earth, activated char, TiO2, ZrO2, TiO2-SiO2, TiO2-Al2O3 or TiO2-ZrO2, and the loading amount of nickel is 5-50 wt.%. The invention is characterized by high activity and stability of used loading nickel catalyst, no pollution of process, direct usage of phthalide as solvent, low cost for post treatment, and simple process.

The invention discloses a foaming material of polyurethane-imide and a preparation method thereof. In the method, after a component A, a component B and a component C are uniformly mixed, a one-trip foaming technique is adopted to carry out preparation and obtain the foaming material of polyurethane-imide, wherein, the component A consists of pyromelliticdianhydride and triguaiacyl ( Beta-chloroethyl) phosphate; the component B includes hydroxyl terminated polysiloxane, PCDL, benzoic anhydride polyester polyols, tributyl amine, the dipropylene glycol liquid of DABCO, water, silicon oil and DMMP; the component C is WDP. The method selects a liquid compound with the effect of a solvent as a special functional addition agent to solve the technical problem of uneven material mixing in the existing preparation method, thus being suitable for the one-trip foaming technique; in addition, the technique is simple and easy to be industrialized. The method can be utilized to prepare the foaming material with excellent thermal stability and flame retardance. The working temperature of the foaming material can achieve more than 150 DEG C; and the oxygen index can reach 30 to 40.

The invention discloses a method for using by-products of phthalic anhydride to prepare BDO / succinic acid diester and phthalic acid diester, wherein, the by-products comprise at least one of wastewater, waste residues and phthalic anhydride residues, a preparation method thereof includes the major steps of esterification, distillation, reduction, etc., thereby obtaining a phthalic acid diester product, and also a BDO or succinic acid diester product. The method can fully recycle phthalic anhydride, phthalic acid, maleic anhydride, fumaric acid, maleic acid, succinic acid, etc. in the by-products such as wastewater, waste residues and phthalic anhydride residues in the production process of phthalic anhydride, thereby obtaining products such as chemical intermediate BDO or succinic acid diester and phthalic acid diester with great market demands, and maximally reducing the discharge of wastes; and the preparation method has advantages of simple and controllable technical process and rather low cost.

The invention relates to a composite epoxy asphalt pavement material and a preparation method thereof. The composite epoxy asphalt pavement material is composed of following components in parts by weight: 50-55 parts of coal tar asphalt, 24-29 parts of phenolic resin, 15-17 parts of bisphenol F-type epoxy resin, 3-5 parts of stearic acid diethanolamide, 6-12 parts of benzoic anhydride and 5-9 parts of aluminum carbonate. According to the composite epoxy asphalt pavement material, the composition materials are heated and fused, agitated, crushed and reacted to prepare the composite epoxy asphalt pavement material; the prepared composite epoxy asphalt pavement material has good corrosion resistance and heat resistance; the composite epoxy asphalt pavement material serves as a bonding layer so that the corrosion stability and the heat stability of a road can be improved.

The invention discloses a preparing method of polyurethane hardener, which comprises the following steps: (1) adopting C16-18 saturated fatty acid as modifier; making benzene carbonic acid as molecular weight controller; dissolving benzoic anhydride, pentaerythrite and adjuvant in the solvent under 150-200 deg.c to proceed catalyzing reaction; preparing modified polyester polyatomic alcohol of fatty acid; (2) catalyzing modified polyester polyatomic alcohol of fatty acid, toluene diisocyanate and adjuvant in the solvent under 50-90 deg.c to obtain the product.

The invention discloses a manufacturing method for producing an unsaturated vibrin by utilizing the wastes and the distilling fractions generated during a phthalic anhydride production process, which belongs to the composing manufacture industry of a macromolecule compound. In the invention, the wastes, the distilling fractions, diethylene glycol, glycol and a catalyst are firstly fed into a reaction kettle and mixed uniformly; the temperature is gradually raised; when the temperature of the reaction kettle is raised to 200 DEG C, the temperature is controlled to be 200 to 220 DEG C for about 3 to 8 hours; when an acid value achieves to 35 to 40, vacuumizing is carried out for 1 to 2h; then a polymerization inhibitor and cinnamene are added into a diluting kettle; the adding amount of the polymerization inhibitor is 100 to 200ppm; when the acid value of the reaction kettle reaches a theoretical value (30 to 35), the temperature is reduced to 150 to 170 DEG C; then the unsaturated vibrin in the reaction kettle is transferred into the diluting kettle for dilution, adjusted into a proper viscosity and packaged. The technique of the method of the invention is simple and changes wastes to be valuable as well as changes the harm into benefit; in addition, the method of the invention can generate excellent economic benefits, reduce the pollution of the wastes to the environment and is beneficial to environment protection.