| Original document(9 pages) Authorized document(4 pages) 中文版 |
To the concentrated black liquor from alkali process of pulpmaking, sulfurous acid is added under heating and stirring to adjust PH and to increase its activity. Sodium dichromate and iron salt are added to form Fe-Cr chelates of lignin. After spray drying, the diluent for oil well drilling slurry is thus obtd. This invention not only provides an excellent diluent for oil well drilling slurry, but also gives a perfect utilization of the black liquor, thus avoiding environmental pollution. |
Application Number
申请号 |
85105229 |
Application Date
申请日 |
1985.07.05 |
| Title 名称 |
Process of producing diluent for oil well drilling slurry made from black liquor of alkali process pulp |
Publication Number
公开号 |
1005080 |
Publication Date
公开日 |
1986.11.19 |
| Approval Pub. Date |
|
Granted Pub. Date |
1989.09.27 |
| International Classification 分类号 |
C09K7/00,C09K7/02 |
Applicant(s) Name
申请人 |
Huanan Polytechnical College |
| Address 地址 |
|
| Inventor(s) Name 发明人 |
Chen Dejun, Chen Yongheng |
| Attorney & Agent 代理人 |
LUO YONG LI BENXIANG |
| More information 更 多 信 息 |
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