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Study On Solid-Liquid Equilibrium For The Systems Of Synthesizing Diphenyl Carbonate

Posted on:2009-01-24Degree:MasterType:Thesis
Country:ChinaCandidate:W C LiFull Text:PDF
GTID:2121360275469966Subject:Chemical Engineering
Abstract/Summary:PDF Full Text Request
Diphenyl carbonate(DPC) is an important aromatic carbonate. This work was carried out with the purpose of providing basic physical data for developing and magnifying the process of synthesizing the diphenyl carbonate by the method of transesterification. On the other hand, the model of DPC solubility was established in order to offer the theoretic fundamation for the industrial process design of DPC.The related reactants such as phenol, ethanol, diethyl carbonate (DEC) and so on, were chosen as the single or mixed solvent, in which the solubility of DPC was measured in this study. The solubility data of DPC in ethanol, DEC, ethanol-DEC and ethanol-phenol at the temperature between 278.15 and 333.15 K were measured by laser-scattering method with the equipment specially used for solid-liquid phase equilibrium , respectively. The results showed that the solubility of DPC in solvents augmented as the temperature increased. And at the same temperature, the solubility of DPC in DEC was much larger than that in ethanol. With increasing of the concentration of ethanol, the solubility of DEC in both ethanol-DEC and ethanol-phenol decreased.Furthermore, the mixtured system of DPC-phenol, DPC-ethanol and DPC-ethanol-phenol were characterized by IR spectrogram, respectively. From analysis , it could be seen that the hydrogen bond formed between DPC and phenol was stronger than that between DPC and ethanol. So it was proved that the solubility of DPC was larger in phenol than in ethanol, which was in good accordance with the experimental data.Wilson equation andλh equation were used to correlate the solubility data, and the binary interaction parameters and the binary interaction energy parameters were gain by regressing the solubility data with particle swarm optimization and Origin 7.0 software. The model of solid-liquid equilibrium established in this work could provide theoretic direction to the industrial production of diphenyl carbonate.
Keywords/Search Tags:diphenyl carbonate, diethyl carbonate, ethanol, phenol, solid-liquid equilibrium, solubility model
PDF Full Text Request
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