发明名称 |
PROCESS FOR THE PRODUCTION OF ISOCYANATES, PREFERABLY DIISOCYANATES AND POLYISOCYANATES WITH SOLVENT RECIRCULATION |
摘要 |
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to form the corresponding isocyanates, subsequent removal of the solvent in at least two steps to obtain at least two solvent streams, individual treatment of the at least two solvent streams, and re-circulation of at least a portion of the solvent streams.
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申请公布号 |
US2012101299(A1) |
申请公布日期 |
2012.04.26 |
申请号 |
US201013380680 |
申请日期 |
2010.06.16 |
申请人 |
SCHELLING HEINER;PENZEL ULRICH;STROEFER ECKHARD;EIERMANN MATTHIAS;SPEIER JON S.;THIELE KAI;BOCK MICHAEL;BASF SE |
发明人 |
SCHELLING HEINER;PENZEL ULRICH;STROEFER ECKHARD;EIERMANN MATTHIAS;SPEIER JON S.;THIELE KAI;BOCK MICHAEL |
分类号 |
C07C263/10 |
主分类号 |
C07C263/10 |
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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