发明名称 |
PROCESS FOR THE DISTILLATIVE PURIFICATION OF DIURETHANES |
摘要 |
The present invention relates to a process for the purification of diurethanes. This process comprises distilling one or more diurethanes corresponding to the general formula: R1 - (NHCOOR2)2 wherein R1: represents a substituted or an unsubstituted aromatic, araliphatic, cycloaliphatic or aliphatic hydrocarbon radical containing from 4 to 10 carbon atoms, wherein suitable substituents comprise alkyl groups containing from 1 to 4 carbon atoms, and R2: represents an alkyl radical containing from 1 to 6 carbon atoms, or a cycloaliphatic hydrocarbon radical containing 5 or 6 carbon atoms; in the presence of low-boiling alcohols at elevated temperatures.
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申请公布号 |
CA2209754(A1) |
申请公布日期 |
1998.01.11 |
申请号 |
CA19972209754 |
申请日期 |
1997.07.07 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
KALTENBACHER, ERWIN;WERSHOFEN, STEFAN;PENNINGER, STEFAN;MENDOZA-FROHN, CHRISTINE |
分类号 |
C07C263/04;C07C269/08;C07C271/08;C07C271/26;C07C271/34;(IPC1-7):C07C269/08;C07C265/14 |
主分类号 |
C07C263/04 |
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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