发明名称 |
Recovery of catalyst systems from diarylcarbonate-containing reaction mixtures by melt crystallization |
摘要 |
Catalyst systems with a content of a platinum-group-metal catalyst, a co-catalyst, a quaternary salt and a base for the oxidative carbonylation of aromatic hydroxy compounds to the corresponding diaryl carbonates are obtained according to the invention as a residual melt by melt crystallization and can be returned into the carbonylation reaction or worked up to valuable materials. The melt crystallizate, which consists predominantly of diaryl carbonate and the parent aromatic hydroxy compound, is worked up to pure diaryl carbonate and pure hydroxy compound.
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申请公布号 |
US5824816(A) |
申请公布日期 |
1998.10.20 |
申请号 |
US19970825602 |
申请日期 |
1997.04.01 |
申请人 |
BAYER AG |
发明人 |
BUYSCH, HANS-JOSEF;HESSE, CARSTEN;RECHNER, JOHANN;WIRGES, HANS-PETER |
分类号 |
B01J38/00;C07B61/00;C07C68/00;C07C68/08;C07C69/96;(IPC1-7):C07C68/00 |
主分类号 |
B01J38/00 |
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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