Mixed metal hydroxide-clay adducts as thickeners for water and o

Details Mixed metal hydroxide-clay adducts as thickeners for water and o Mixed metal hydroxide-clay adducts as thickeners for water and o

1991-05-10

1993-03-23

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

252 2, 252 28, 252 71, 25217425, 252184, 252309, 252314, 2523152, 428697, 501118, 501119, 507140, 507906, B01F 314, B01J 1300

Patent

active

051961431

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.sup.n.sub.a.H.sub.2 O, where x is zero or more representing excess water of hydration, 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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