发明名称 |
Process for producing diaryl carbonate |
摘要 |
A process for producing diaryl carbonate of the present invention comprises steps of: (1) a diaryl carbonate production step of subjecting an aromatic monohydroxy compound and phosgene to condensation reaction at a temperature of 80 to 180° C. in the presence of an aromatic nitrogen-containing heterocyclic compound catalyst to obtain the diaryl carbonate; (2) a purification step of removing impurities from a hydrogen chloride gas by-produced upon the condensation reaction; (3) a chlorine recovery step of recovering chlorine usable for the production of phosgene from the purified hydrogen chloride gas; and (4) a phosgene production step of reacting the recovered chlorine with carbon monoxide to obtain phosgene usable in the diaryl carbonate production step. Such a process for producing diaryl carbonate by reacting an aromatic monohydroxy compound with phosgene using a catalyst comprising an aromatic nitrogen-containing heterocyclic compound has merits that the diaryl carbonate can be produced in an industrially advantageous manner even at a high conversion rate, and the by-produced hydrogen chloride is converted into chlorine and then is used in phosgene production process.
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申请公布号 |
US2001041806(A1) |
申请公布日期 |
2001.11.15 |
申请号 |
US20000748766 |
申请日期 |
2000.12.26 |
申请人 |
MIYAMOTO MASAAKI;HYOUDOU NARUTOSHI |
发明人 |
MIYAMOTO MASAAKI;HYOUDOU NARUTOSHI |
分类号 |
C01B7/04;C01B7/07;C07C68/02;(IPC1-7):C07C69/96 |
主分类号 |
C01B7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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