发明名称 |
Method for producing phthalic anhylic anhydride according to specifications |
摘要 |
On-spec phthalic anhydride is prepared by distillative purification of crude phthalic anhydride by a process in which crude phthalic anhydride is fed to a distillation column which is operated at reduced pressure, the low boilers are removed at the top or in the vicinity of the top of the distillation column and the on-spec phthalic anhydride is removed from the column via a side take-off.
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申请公布号 |
US6570026(B1) |
申请公布日期 |
2003.05.27 |
申请号 |
US20020049858 |
申请日期 |
2002.02.19 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
PESCHEL WERNER;BESSLING BERND;REUTER PETER;LORZ PETER MICHAEL;ULRICH BERNHARD;KNAB JEAN WERNER;KUMMER MATTHIAS;RUEHL THOMAS |
分类号 |
B01D3/00;B01D3/10;C07D307/89;(IPC1-7):C07D307/89 |
主分类号 |
B01D3/00 |
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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