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Conversion of spent sulfite liquor into chromium lignosulfonates and its evaluation as a drilling fluid additive

Journal Article · · Energy Sources (N.Y.); (United States)
The chemistry of Indian spent sulfite liquor and methods to isolate sodium lignosulfonates from it have been discussed earlier. It has been observed experimentally that spent sulfite liquor as such is not an effective oil-well drilling fluid additive. Although its sodium lignosulfonate derivatives exhibited some effectivity, they were not thermostable. An effort has been made to further improve the performance characteristics and chemical nature of the sodium lignosulfonate by chromium metal ion complexing, employing conductometric titration method. The resulting chromium lignosulfonates possess better chemical properties, thermal stability, and effectivity as oil-well drilling fluid additive. Synthesis of metal ion lignosulfonates would save a considerable amount of foreign exchange in India and lead to ''import substitution'' in oil exploration. Experimental details of chromium metal ion complexing of sodium lignosulfonate, its chemistry, and its industrial application as oil-well drilling fluid additive have been discussed.
Research Organization:
Inst. of Drilling Technology, ONGC, Dehra Dun
OSTI ID:
5601040
Journal Information:
Energy Sources (N.Y.); (United States), Journal Name: Energy Sources (N.Y.); (United States) Vol. 8:2; ISSN EGYSA
Country of Publication:
United States
Language:
English