求关于二氧化碳和甲醇直接生成碳酸二甲酯的热力学资料
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发布时间：2022-05-26 03:36
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时间：2024-03-22 22:37
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碳酸二甲酯与苯酚酯交换合成碳酸二苯酯的热力学性质及均相催化剂(英文)--《合成化学》
The Gibbs free energy of formation and entropy of liquid dimethyl carbonate(DMC) at 298.15K and 101.325kPa were estimated to be -472.3 kJ·mol -1 and 245.2 J·mol -1 ·K -1 respectively. The thermodynamic properties (Δ rH 0 m,Δ rS 0 m,Δ rG 0 m and equilibrium constant) of the reactions for the proction of diphenyl carbonate(DPC) and anisole between DMC and phenol from 298K to 523K were calculated. These values indicated that the reaction of transesterification of DMC with phenol to DPC was endothermic and thermodynamically unfavorable. n Bu 2SnO, Ti(OC 4H 9) 4, AlCl 3 and ZnCl 2 were tested to catalyze the synthesis of DPC by transesterification of DMC with phenol. n Bu 2SnO had the highest catalytic activity among them. The optimum temperature was 453K for the synthesis of DPC. When the molar ratio of phenol to dimethyl carbonate was 4∶1, the yield and selectivity of DPC were 43.0% and 88.7% respectively using n Bu 2SnO as a catalyst.
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时间：2024-03-22 22:37
