发明名称 |
PROCESS FOR PRODUCING ISOCYANATE |
摘要 |
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel. |
申请公布号 |
EP2275406(A4) |
申请公布日期 |
2015.10.14 |
申请号 |
EP20080752810 |
申请日期 |
2008.05.15 |
申请人 |
ASAHI KASEI CHEMICALS CORPORATION |
发明人 |
SHINOHATA, MASAAKI;MIYAKE, NOBUHISA |
分类号 |
C07C263/04;C07C263/18;C07C265/14 |
主分类号 |
C07C263/04 |
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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