Water swellable clay composition and method to maintain stabilit

Details Water swellable clay composition and method to maintain stabilit Water swellable clay composition and method to maintain stabilit

1985-06-28

1987-01-06

Guynn, Herbert B.

Compositions

Leather or fur treating

2523152, 252 851, 405264, C09K 702, E02D 312

Patent

active

046345388

ABSTRACT:
Disclosed is a composition including a water swellable clay, and particularly a montmorillonite clay, such as bentonite; xanthan gum; and one or more additional water-soluble gums, for example, guar dextran, acacia or locust bean. The xanthan gum together with one or more additional water-soluble gums prevents montmorillonite clay composition from substantial coagulation or flocculation upon contact with salt contaminated water even in high concentrations of, for example, 15-40% by weight salt. It has been found that xanthan gum in an amount of 0.1-20% based on the weight of the water-swellable clay, i.e. bentonite, in the composition together with one other water soluble gum, for example guar gum, dextran gum, acacia gum and/or locust bean gum in an amount of 1.0-10% based on the weight of bentonite in the composition will provide a clay composition capable of excellent stability without component separation in salt contaminated water. The composition is particularly useful as an additive to compositions used as stable drilling fluids in rotary drilling, and as lagoon and landfill sealants.

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patent: 3909421 (1975-09-01), Gaddis
patent: 4105461 (1978-08-01), Racciato

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