Production of acrylonitrile acrylate hydrolysis, β- propiolactone law Leipei and modified Leipei law, cyanide ethanol and direct oxidation of propylene. 1. Cyanide ethanol chlorine ethanol and sodium cyanide as raw materials, the reaction of cyanide ethanol, ethanol in the presence of cyanide hydrolysis of acrylic acid in sulfuric acid. 2. Acrylonitrile hydrolysis acrylonitrile due to rich sources, we developed a method for the production of raw materials acrylonitrile acrylate. The method has been industrialized Societe Ugine France and Standard Oil Co (O-hio) method. Acrylonitrile with sulfuric acid heated to 90 ℃, hydrolyzed acrylonitrile into acrylamide, sulfate further esterification acrylate. Acrylonitrile-butyl acrylate as raw materials, the use of one-step production, yield 95% ester. 3.β- propiolactone method with acetic acid (or acetone) as raw materials, triethyl phosphate as a catalyst, at 625-730 ℃ cracking to ketene. Then reacted with anhydrous methylphenidate sales butyl acrylate, a gas phase reaction at 25 ℃ factory direct butyl acrylate, generating β- propiolactone at AICI3 or BF3 catalyst: as the desired product is acrylic acid, and then heat-propiolactone 100% phosphoric acid in contact, then isomerized acid; if the desired product is an acrylate, the crude propiolactone used without purification, reacted directly with the corresponding alcohol and sulfuric acid. Common solvents used for crystallization and recrystallization are: water, methanol, ethanol, isopropanol, acetone, ethyl acetate, chloroform, acetic acid, dioxane, carbon tetrachloride, benzene, petroleum ether and the like. In addition, toluene, nitromethane, diethyl ether, dimethylformamide, dimethyl sulfoxide and the like are often used. Dimethylformamide and dimethyl sulfoxide was dissolved capacity, when not find other suitable solvents Beijing butyl acrylate, can try. But often not easily crystallized from the solvent precipitation, and high boiling point, the solvent adsorbed on the crystals difficult to remove, is a disadvantage. Although it is commonly used ether solvent, but if other suitable solvent, preferably without ether, because on the one hand due to the ether flammable, explosive, particularly dangerous when used, should be especially careful; on the other hand due to the ether along easy For wall crawling leaving purified volatile chemicals on the sidewall precipitation, which affects the crystalline purity. Factory direct butyl acrylate | Qingdao acrylate | Xiang Xiang dry dry chemical from Jinan Chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) strong, credible, in Jinan, Shandong alcohol industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiang dry chemical into the brilliant and you work for a better future! You can also access (www.dilunyierchun.com/supply_details_38806185.html), for more information about the company.