发明名称 |
Modified lignosulfonate drilling fluid dispersants and process for the preparation thereof |
摘要 |
The present invention relates to modified lignosulfonate materials and the process for their preparation. These modified lignosulfonates result from the sulfonation of ultrafiltered lignosulfonates by reaction with sulfite-bisulfite salts. The removal of sugars and other low molecular weight impurities makes formation of these new modified lignosulfonates more complete. These derivative materials when reacted with metal salts such as chromium, ferrous, ferric, titanium, and zirconium produce oil well drilling fluid dispersant products with significantly improved performance and thermal properties.
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申请公布号 |
US4728727(A) |
申请公布日期 |
1988.03.01 |
申请号 |
US19870007772 |
申请日期 |
1987.01.28 |
申请人 |
ITT CORPORATION |
发明人 |
REINTJES, MARTEN;MARKEN, CRAIG D. |
分类号 |
C09K8/20;(IPC1-7):C08H5/02 |
主分类号 |
C09K8/20 |
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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