Compositions – Leather or fur treating
Patent
1986-08-22
1988-07-05
Guynn, Herbert B.
Compositions
Leather or fur treating
252 851, 530506, C09K 702, C07G 100
Patent
active
047553073
ABSTRACT:
An improved process for making drilling fluid additives. The drilling fluid additives generally comprise titanium and/or zirconium lignosulfonates. The improved process of this invention can be performed without any delays caused by plugging during filtration. Filtration plugging problems are eliminated by adding only stoichiometric amounts of zirconium and/or titanium lignosulfonate to the lignosulfonate mixture prior to filtration.
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patent: 4447339 (1984-05-01), Detroit
patent: 4457853 (1984-07-01), Detroit
Gray, et al., Composition and Properties of Oil Well Drilling Fluids (4th Ed. 1981), pp. 570-573.
Park Lee S.
Turner Finis S.
Dresser Industries Inc.
Guynn Herbert B.
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