发明名称 |
Process for the preparation of alkanolamines having improved color quality |
摘要 |
Preparation of alkanolamines having improved color quality by treating the alkanolamine with an effective amount of phosphorous acid or hypophosphorous acid or compounds thereof initially at elevated temperature over a period of at least 5 min (step a), and then distilling it in the presence of an effective amount of one of these phosphorus compounds (step b).
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申请公布号 |
US2001031897(A1) |
申请公布日期 |
2001.10.18 |
申请号 |
US20010805725 |
申请日期 |
2001.03.07 |
申请人 |
RUIDER GUNTHER;ROBETA KARL-HEINZ;MELDER JOHANN-PETER;SCHULZ GERHARD;GUTSCHOVEN FRANK;BUSKENS PHILIP |
发明人 |
RUIDER GUNTHER;ROBETA KARL-HEINZ;MELDER JOHANN-PETER;SCHULZ GERHARD;GUTSCHOVEN FRANK;BUSKENS PHILIP |
分类号 |
C07C213/10;C07C215/08;C07C215/12;C07C215/14;(IPC1-7):C0729/84 |
主分类号 |
C07C213/10 |
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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