发明名称 |
Phenolic resin purification |
摘要 |
The invention is for a process of removing acid salt contaminants from a resin solution. The process comprises providing an organic solution of a phenolic resin having a portion of its phenolic hydroxyl groups condensed with an acid halide in the presence of a base catalyst. The organic solutions is then contacted with a strong acid cation exchange resin and a base anion exchange resin for a time sufficient to remove essentially all of said acid salt contaminants. Acid salt contamination is reduced to a level below normal detection limits.
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申请公布号 |
US6200479(B1) |
申请公布日期 |
2001.03.13 |
申请号 |
US19970783211 |
申请日期 |
1997.01.14 |
申请人 |
SHIPLEY COMPANY, L.L.C. |
发明人 |
ZAMPINI ANTHONY;SANDFORD HAROLD F. |
分类号 |
B01J39/04;C08G8/10;C08G8/28;G03F7/023;(IPC1-7):B01D15/04 |
主分类号 |
B01J39/04 |
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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