Influence of entrainer recycle for batch heteroazeotropic distillation

Application of Dimethyl Carbonate Assisted Chemical Looping Technology in the Separation of the Ethylene Glycol and 1,2-Butanediol Mixture and Coproduction of 1,2-Butene Carbonate

“…However, according to the simulation results reported by Chen et al, the flow rate of the recycled stream was very large, which resulted in a massive reboiler duty consumption . In addition, the yield of EG is limited as it is distilled out along with the removal of 1,2-BDO . Thus, physical methods cannot achieve a clear separation of the 1,2-BDO and EG mixture, increase the yield of the EG product, and obtain the 1,2-BDO product. ,, …”

Isobaric Vapor–Liquid Equilibrium of Isoamyl Alcohol, Cyclohexane, n-Hexane, and the n-Heptane + Isoamyl Butyrate Binary System at 101.3 kPa

“…According to the theory of chemical thermodynamics, entrainers form a binary or ternary azeotrope with water or one of the reactants to bring the water out of the reaction system in time, , breaking the thermodynamic equilibrium of the reaction and speeding up the reaction. − In addition, adding entrainers in reactive distillation can reduce the temperature of the reaction zone and protect the activity of the catalyst . The amount of entrainers, cost, impacts on the environment, and the ease of separation from the product are also important indicators for the choice of entrainers. − The common entrainers in the synthesis of isoamyl butyrate are n -hexane, cyclohexane, isoamyl alcohol, and n -heptane. In order to make the production process of ester products a truly green chemical industry, how to select, use, and deal with the problem of entrainers in the esterification reaction will surely arouse people’s general attention. , …”

A Novel Process for the Production of Triethylene Glycol Di-2-ethylhexoate by Reactive Distillation Using a Sulfated Zirconia Catalyst

“…The product purification accounts for about 50% of the total expenses of the chemical industry. 7,8 In the traditional chemical industry process, reactive distillation (RD) is a common intensification process that combines the reaction and separation into a single piece of equipment, which could significantly reduce energy consumption. 9−12 Besides, reactive distillation could also simplify the process, break the limitation of reaction equilibrium, and improve product yield in esterification, etherification, and transesterification.…”

“…The product purification accounts for about 50% of the total expenses of the chemical industry. , In the traditional chemical industry process, reactive distillation (RD) is a common intensification process that combines the reaction and separation into a single piece of equipment, which could significantly reduce energy consumption. − Besides, reactive distillation could also simplify the process, break the limitation of reaction equilibrium, and improve product yield in esterification, etherification, and transesterification. , Ran et al have broken the limitation of equilibrium conversion of methacrylic acid and methanol by a reactive distillation column and achieved 99.5% methyl methacrylate purity and 99.0% methacrylic acid conversion. According to Tung and Yu’s work, the case where reactants are intermediate key components is the most favorable for reactive distillation.…”