Gelling organic liquids

Details Gelling organic liquids Gelling organic liquids

1990-01-05

1993-03-02

Lovering, Richard D.

Compositions

Leather or fur treating

2523151, 44268, E21B 4326, B01J 1300

Patent

active

051906759

ABSTRACT:
A method of producing a gel of an organic liquid, using a metal phosphate ester in which all of the reagents are substantially free of water and pH-affecting substances. The gel is particularly useful in fracturing subterranean formations by entraining a solid particulate proppant therein and pumping the resultant mixture into the subterranean rock formation at sufficient pressure to fracture the formation. The organic liquid is preferably a hydrocarbon such as diesel or crude oil, and the metal phosphate ester is preferably an aluminum phosphate diester. The metal phosphate diester may be prepared by the reaction of a triester with P.sub.2 O.sub.5 to produce a polyphosphate, which is then reacted with an alcohol to produce a phosphate diester. The latter diester is then added to the organic liquid along with a non-aqueous source of aluminum, such as aluminum isopropoxide in diesel, to produce the metal phosphate diester. The conditions in the foregoing two reaction steps are controlled to provide a gel with good viscosity versus temperature and time characteristics.

REFERENCES:
patent: 3575859 (1971-04-01), Monroe
patent: 3757864 (1973-09-01), Crawford et al.
patent: 4104173 (1978-08-01), Gay et al.
patent: 4153649 (1979-05-01), Griffin
patent: 4174283 (1979-11-01), Griffin
patent: 4200540 (1980-04-01), Burnham
patent: 4316810 (1982-02-01), Burnham
patent: 4537700 (1985-08-01), Purinton
patent: 4877894 (1989-10-01), Huddleston

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