| 发明名称 |
Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes |
| 摘要 |
A mixture of isomeric diisocyanatodiphenylmethanes composed of at least 2,2'-diisocyanato-diphenylmethane, 2,4'-diisocyanatodiphenylmethane and 4,4'-diisocyanatodiphenyl-methane is distilled in at least one stage and a divided-wall column is used in at least one distillation stage.
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| 申请公布号 |
US2004236139(A1) |
申请公布日期 |
2004.11.25 |
| 申请号 |
US20040838456 |
申请日期 |
2004.05.04 |
| 申请人 |
SCHAL HANS-PETER;WOLF ULRICH;THELEN BERND |
发明人 |
SCHAL HANS-PETER;WOLF ULRICH;THELEN BERND |
| 分类号 |
C07C263/20;C07C265/14;(IPC1-7):C07C253/34 |
主分类号 |
C07C263/20 |
| 代理机构 |
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