Compositions – Preservative agents – Anti-corrosion
Patent
1991-11-15
1994-05-03
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
252 2, 252 28, 252 71, 25217425, 252184, 252309, 252314, 507136, 507139, 507140, B01F 314, B01J 1300
Patent
active
053085477
ABSTRACT:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
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Barnes Audrey L.
Burba, III John L.
Lovering Richard D.
The Dow Chemical Company
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