发明名称 |
PROCESS FOR THE PREPARATION OF STABLE DYESTUFF SOLUTIONS: PRESSURE PERMEATION IN PRESENCE OF BORIC ACID OR BORATE |
摘要 |
By adding boric acid or salts of boric acid before or during the pressure permeation of anionic dyestuff solutions, the filtration flux is substantially increased, resulting in a low-cost process, due to the shorter plant time required.
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申请公布号 |
US5145485(A) |
申请公布日期 |
1992.09.08 |
申请号 |
US19910665630 |
申请日期 |
1991.03.06 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
MICHNA, MARTIN;ZILLGER, WERNER;TEGTMEYER, DIETRICH |
分类号 |
C09B67/26;C09B67/54 |
主分类号 |
C09B67/26 |
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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