| 发明名称 |
SOLUBILIZATION OF HUMIC ACIDS, LIGNITES AND COALS |
| 摘要 |
A process for the preparation of water-soluble products from humic acids, lignites and pre-oxidized coals which are reacted with a sulfonating agent to form a sulfite or a bisulfite in situ, in an alkaline medium. The water-soluble product is useable as a well-drilling fluid.
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| 申请公布号 |
US3700728(A) |
申请公布日期 |
1972.10.24 |
| 申请号 |
USD3700728 |
申请日期 |
1968.12.30 |
| 申请人 |
CANADIAN PATENTS AND DEV. LTD. |
发明人 |
SPEROS E. MOSCHOPEDIS;ERNST CZAKERT;STEPHEN M. CREIGHTON |
| 分类号 |
C08H99/00;C09K8/20;(IPC1-7):C07C143/52 |
主分类号 |
C08H99/00 |
| 代理机构 |
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