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Adipic acid is the most important industrial aliphatic dicarboxylic acid is an important organic chemical raw materials. Cyclohexane biomimetic catalytic oxidation process to produce large amounts of pickling water. The cyclohexane oxidation pickling water contains a lot of adipic. Recycling the cyclohexane oxidation pickling water adipic to reduce production costs, reduce environmental pollution, improve the economic value and social benefits, adipic acid recycling technology research. Nitrate as the oxidant treatment cyclohexane oxidation pickling optimum conditions for water recycling adipic the foundation on the determination of the physical properties of the reaction system, and to study the impact of adipic acid crystals have been identified related factors. Primary crystals and secondary crystallization conditions on the yield and purity of the adipic acid products were investigated to determine the amount of water taken once crystallization feeding amount of 80 to 85% is more appropriate, the water should be greater than the secondary crystallization The feeding amount of 85%, under this condition adipic secondary crystallization product recovery can reach 100%, purity over 99%. It also investigated the impact of the process conditions of the crystallization temperature, cooling rate, and the presence of seed yield, purity and particle size distribution of adipic acid crystals. The hydrogen peroxide treatment the cyclohexane oxidation pickling water process conditions, the effects of reaction temperature, the amount of hydrogen peroxide, and the reaction time and the influence of the catalyst on the product purity and recovery of adipic. In the presence of a catalyst under the conditions, the concentration of 30% hydrogen peroxide in an amount of 2/3 of the amount of raw materials, the reaction temperature was 70 ° C, the reaction time was 2.5h, the product purity of 98.67%, while the recovery was 79.72 %. The laser monitoring system, respectively, in the temperature range of 292.15K ~ 354.60K Determination of the solubility of the mixed solution of glutaric acid in glacial acetic acid, cyclohexanone, cyclohexanol, and their five kinds proportion. And using the empirical equation, λh equation solubility data regression, gives the relevant model parameters, and Wilson equation and NRTL equation predicted mixed ternary system the solubility of the glutaric acid in cyclohexanone / cyclohexanol. The results show that the empirical equation and the λh equation can be good regression glutaric acid solubility in pure solvent, the maximum average error of 1.15% and 2.20%, respectively. Wilson equation and the NRTL equation at high temperatures more good predictor for the solubility of glutaric acid in different concentrations mixed solvent.
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