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U.S. Department of Energy
Office of Scientific and Technical Information

Oil well drilling clay conditioner

Patent ·
OSTI ID:5588563
A high quality chrome lignosulfonate for use as an oil well drilling additive is produced from molecular weight and/or high carbohydrate containing spent sulfite liquor. The additive is obtained by adding boron prior to the oxidation of the lignosulfonate and complexing with chrome. The use of boron allows the raw material spent sulfite liquor source to be less pure and from a wide variety of wood.
Assignee:
Reed Lignin Inc.
Patent Number(s):
US 4505827
OSTI ID:
5588563
Country of Publication:
United States
Language:
English