发明名称 |
METHOD FOR PROCESSING PARTICULATE RAW POLYOXYMETHYLENE |
摘要 |
The invention relates to a process for working up particulate crude polyoxymethylene, which comprises the following steps: (a) introduction of the particulate crude polyoxymethylene into an extraction column (13) operated at a pressure in the range from 1 to 6 bar, (b) introduction of a polar extractant into the extraction column (13) with a temperature in the range from 95 to 140° C. and a pressure in the range from 1 to 6 bar, wherein from 10 to 1000 ppm, based on the amount of polar extractant introduced, of a buffer substance which buffers in the pH range from 7.5 to 11.5 are introduced into the extraction column (13). |
申请公布号 |
EP2742077(A2) |
申请公布日期 |
2014.06.18 |
申请号 |
EP20120740169 |
申请日期 |
2012.07.27 |
申请人 |
BASF SE |
发明人 |
DEININGER, JÜRGEN;DEMETER, JÜRGEN;HÄFFNER, RÜDIGER;SCHULZ, RALF;STAMMER, ACHIM |
分类号 |
C08G2/18;C08G2/00;C08G2/38;C08L59/00 |
主分类号 |
C08G2/18 |
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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