Liu J.,Research Institute of Yangzi Petrochemical Ltd Company |
Xu Y.,Research Institute of Yangzi Petrochemical Ltd Company |
Xiao X.,Research Institute of Yangzi Petrochemical Ltd Company |
Xing Y.,Research Institute of Yangzi Petrochemical Ltd Company |
And 2 more authors.
Huagong Xuebao/CIESC Journal | Year: 2012
Using the static analytical method, the solubilities of terephthalic acid and 1, 4-carboxybenzaldehyde in binary solvent mixtures of acetic acid and water were measured. The experimental temperature ranged from 420 K to 505 K, and the mass fraction of acetic acid in the solvent mixtures ranged from 0 to 100% for terephthalic acid and from 40% to 100% for 1, 4-carboxybenzaldehyde. It is shown that as the mass fraction of acetic acid increases from 70% to 100%, the solubility of terephthalic acid reduces gradually within the temperature range. Above 470 K, the solubility of terephthalic acid increases rapidly with temperature, and at 70% mass fraction of acetic acid the solubility is most sensitive to temperature. The solubility of terephthalic acid in water shows different characteristics from that in binary solvent mixtures of acetic acid and water. Below 470 K, the solubility of terephthalic acid is less than that in the aqueous acetic acid solution. When the mass fraction of acetic acid increases from 40% to 100%, the solubility of 1, 4-carboxybenzaldehyde increases gradually, but it is not sensitive to temperature. All solubility data of terephthalic acid and 1, 4-carboxybenzaldehyde are correlated by modified Apelblat equation, which is in good agreement with experimental data. © All Rights Reserved.
Ling Z.-J.,Research Institute of Yangzi Petrochemical Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2011
With the commercial scale wall-cooled fixed-bed reactor of ethylene oxide synthesis in Yangzi Petrochemical Co. as the object. The models of global kinetic of YS-6 sliver catalyst are amended to obtain the models of global kinetic of YS-7 sliver catalyst. One-dimensional pseudo homogeneous reactor model in steady state of ethylene oxide synthesis is founded. Compared the calculated values with industrial actual values, the result of simulation is identical to the actual data of the plant, the accuracy of reactor model and global kinetic equations used in this paper are tested. The model can be used in the reactor simulation and operation optimization.