Process for preparing stable aqueous gel

Details Process for preparing stable aqueous gel Process for preparing stable aqueous gel

1984-06-01

1986-04-15

Lovering, Richard D.

Hydraulic and earth engineering

Earth treatment or control

Chemical

252 855R, 405270, 523130, 524916, C09K 1700, E02D 312, E21B 4322

Patent

active

045824525

ABSTRACT:
A process for forming a gel by gelling an aqueous solution of a water-soluble polymer with a chromium compound as a gelling agent, in which a copolymer of acrylamide, 0.5 to 40% by mole of an unsaturated sulfonic acid or its salt, and optionally an unsaturated carboxylic acid or its salt having an intrinsic viscosity of at least 10 in 1N-NaNO.sub.3 at 30.degree. C., is used as the water-soluble polymer, and which is availably applied to improvement of water-oil ratio in oil production and to civil engineering for preventing leakage of underground water. The formed gel is very stable in a water system containing salts in high concentrations at high temperatures.

REFERENCES:
patent: 2801984 (1957-08-01), Morgan et al.
patent: 3502149 (1970-03-01), Pence, Jr.
patent: 3909423 (1975-09-01), Hessert et al.
patent: 4015991 (1977-04-01), Persinski et al.
patent: 4055502 (1977-10-01), Swanson

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