发明名称 |
Production of oxidized humic acids by an oxygen-alkali process |
摘要 |
A method is disclosed for the production of oxidized humic acids. The process of the invention comprises reacting humic acid bearing ores with oxygen under alkaline conditions at a temperature between 100 DEG C. and 200 DEG C. for at least +E,fra 1/2+EE hour, but usually for 1-2 hours, to produce oxidized humic acids which are soluble at pH as low as 2.9 and which are formed in yields of at least 70%. The oxidized humic acids produced according to the process of the invention are also superior viscosity reducers.
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申请公布号 |
US5688999(A) |
申请公布日期 |
1997.11.18 |
申请号 |
US19960592678 |
申请日期 |
1996.01.26 |
申请人 |
LIGNOTECH USA, INC. |
发明人 |
LEBO, JR., STUART E.;WIRTZ, KEVIN R.;DICKMAN, STEPHEN L. |
分类号 |
C08H99/00;(IPC1-7):C07C65/01 |
主分类号 |
C08H99/00 |
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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