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摘要: 研究了氧化羰化苯酚合成碳酸二苯酯反应。发现了Fe(III)EDTA 在PdCl2/Fe(III)EDTA/1,4苯醌/ 四丁基溴化铵催化体系中具有很好的助催化效果。讨论了上述催化体系中的每一组分的作用，并提出了一个催化反应机理。氧化羰化苯酚合成碳酸二苯酯反应的最佳温度为100℃～120℃。当反应在100℃、PCO=2.0MPa、PO2=0.5MPa、苯酚 0.5mol、 PdCl2 0.28mmol、n(PdCl2)∶n(Fe(III)EDTA)∶n(苯醌)∶n(四丁基溴化铵)=1∶1∶10∶40、 4A 分子筛 5.0g、 4h进行时，碳酸二苯酯的产率和选择性分别为8.35%和97.5%。压力越高对生成碳酸二苯酯越有利。
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关键词:
- Fe(III)EDTA /
- 碳酸二苯酯 /
- 氧化羰化 /
- 氯化钯
Abstract: The synthesis of diphenyl carbonate (DPC) by oxidative carbonylation of phenol was studied. Fe(III)EDTA was found to be efficient in PdCl2/Fe(III)EDTA/1,4benzoquinone (BQ)/ tetrabutylammonium bromide (TBAB) catalyst system. The role of each component in the catalyst system was discussed. A catalytic mechanism was proposed. The optimum reaction temperature for oxidative carbonylation of phenol to DPC was 100℃～120℃. When the reaction was catalyzed over PdCl2/Fe(III)EDTA/BQ/Bu4NBr, at 100℃，p CO=2.0MPa，pO2=0.5MPa，phenol 0.5mol, PdCl2 0.28mmol, nPdCl2)∶n(redox cocat.)∶n(BQ)∶n(Bu4NBr)=1∶1∶10∶40, 4 A molecular sieve 5.0g, 4h, the yield and selectivity of DPC were 8.35% and 97.5% respectively. High pressure was favorable for the production of DPC.-
Key words:
- Fe(III)EDTA /
- diphenyl carbonylation /
- oxidative carbonylation /
- palladium chloride
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