Haimeng study on the supply of food-grade adipic Industry

Haimeng study described in detail the role of Industrial Co., the manufacturer of high-quality, adipic phone manufacturers, adipic acid, CAS number, adipic acid, adipic Shanghai's latest offer, the price of adipic acid, adipic acid, adipic acid manufacturers distributor, adipic acid manufacturers latest offer, the amount of adipic acid. English: Adipic acid. Molecular formula: C6H10O4. Molecular Weight: 146.14. Chinese alias: adipic acid (capacitor grade); sublimation, also known as fat acids. CAS: 124-04-9. Properties: white crystalline powder, microstrip sour, melting point 153 ℃, the density of 1.360g / cm3, mp153 ℃, normal boiling point 337.5 ℃, begin to decompose at 330.5 ℃, flash point 210 ℃, 191 ℃ (closed) Application: Buffer ; neutralizer; sour agents; flavoring agents as food acidifier, ester plasticizers and textile treatment agents; used in medicine, pesticides, fragrances, adhesives and the like flux level of production: solid beverage 0.01 g / kg of chewing gum 4.0mg / kg Solubility soluble in water, soluble in most organic solvents such as alcohol, ether. Adipic acid solubility in water with large temperature changes, when the solution temperature from 28 ℃ rose to 78 ℃, the solubility can be increased 20-fold. At 15 ℃ solubility of 1.44g / 100mL; 25 ℃, the solubility of 2.3g / 100mL; 100 ℃, the solubility of 160g / 100mL. Is mainly used as raw material for synthetic polymers, plasticizers and lubricants are also used for making adipic acid is a white crystalline solid. Soluble in alcohol, ether, soluble in acetone, slightly soluble in cyclohexane and benzene. When adipic acid content higher than 14% oxygen mass is easy to produce static electricity caused a fire. Contents ranged from adipic dust explosion in the air 3.9% -7.9%. Adipic acid is an aliphatic dicarboxylic acid value of the most dibasic acid salt-forming reaction can occur, esterification, and amidation reaction with diamine or diol condensation into a polymer, etc. . White crystals, m.p. 153.0 ~ 153.1 ℃. Dicarboxylic acid is of great significance in the industry, in all the dicarboxylic acid production ranks second. The main system for adiponitrile thereby producing hexamethylene diamine, and the production of nylon 66 with hexamethylene diamine (see polyamide). In addition, also for the production of unsaturated polyester, hexanediol and adipic acid esters. In 1937, DuPont cyclohexanol with nitric oxide (derived from phenol hydrogenation system), the first to achieve the industrial production of adipic acid. Into the 1960s, the industry gradually switched to cyclohexane oxidation method, that made first by the intermediate product cyclohexane cyclohexanone and cyclohexanol mixture (ie one alcohol oil, also known as KA oil), and then the KA oil nitric acid or air oxidation. The catalyst used in the reaction is copper - vanadium (0.1% to 0.5% copper, 0.1% to 0.2% vanadium), temperature 60 ~ 80 ℃, pressure 0.1 ~ 0.4MPa. The yield was 92% to 96% of the theoretical value. KA oil oxidation products distilled nitric acid, and then purified through two crystal can be obtained high purity adipic acid. Air oxidation method is based on copper acetate and manganese acetate as catalyst, acetic acid as the solvent, direct KA oil oxidation with air. Generally use two reactors in series: a first stage of the reaction temperature is 160 ~ 175 ℃, pressure 0.7MPa (gauge pressure), and the reaction time is about 3h; the second stage reaction temperature 80 ℃, pressure 0.7MPa (gauge pressure), and the reaction time is about 3h. The product was purified by crystallization oxidation levels can be recycled solvent recovered after treatment. The law is quite selective and nitric acid method, highly corrosive nitric acid method of problem-free, but the response time was four times the nitric acid method, so the use is still small. Haimeng study Industrial Co., integrity management, welcomed the new and old customers call to discuss! Contact: Zhou Li 021-61720900 / 60536060 13917028007/13917026856 QQ: 1317125719 Want: mengjiu2015