Polybasic acid esters as oil field corrosion inhibitors

Details Polybasic acid esters as oil field corrosion inhibitors Polybasic acid esters as oil field corrosion inhibitors

1991-09-20

1992-12-29

Stoll, Robert L.

Compositions

Leather or fur treating

25238962, 252392, 422 16, 5483471, 544107, 544127, 544156, 544157, C23F 1114

Patent

active

051749130

ABSTRACT:
A corrosion inhibitor with excellent film forming and film persistency characteristics may be produced by first reacting in a condensation reaction a polybasic acid with a polyalcohol to form a partial ester. The partial ester is reacted with imidazoline and/or fatty diamines to salt the ester. If warranted, the salted partial ester may be reacted with a metal hydroxide, a metal oxide, and/or ammonia to further salt the ester. Surfactants may be added to tailor the inhibitor formulation to meet the specific needs of the user (i.e., the corrosion inhibitor may be formulated to produce an oil-soluble, highly water-dispersible corrosion inhibitor or an oil-dispersible, water-soluble corrosion inhibitor). Suitable carrier solvents may be employed where needed to effectively disperse the corrosion inhibitor formulation.

REFERENCES:
patent: 4179457 (1979-12-01), Crawford

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