Precipitation control

Details Precipitation control Precipitation control

1994-05-28

1992-06-30

Maples, John S.

Compositions

Leather or fur treating

252 8553, 252 8555, 252146, 166311, 166312, C23F 1104, E21B 4327

Patent

active

051260590

ABSTRACT:
A precipitation control composition comprises an iron sequestering agent and a ketone-type compound as sulfide modifier. The precipitation control composition is useful to retard undesirable precipitation of iron and sulfur species from an acid solution of increasing pH. In combination with an acid solution, the precipitate control composition comprises an acidizing composition which is particularly useful in the acidizing of sour hydrocarbon wells. Also disclosed is the method of retarding undesirable precipitation of iron and sulfur species from an acid solution of increasing pH.

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patent: 4381950 (1983-05-01), Lawson
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patent: 4679631 (1987-07-01), Dill et al.
patent: 4683954 (1987-08-01), Walker et al.
patent: 4938925 (1990-07-01), Peterson et al.
patent: 5013483 (1991-05-01), Frenier et al.

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