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

C - Chemistry, Metallurgy

07

C

C07C 69/608 (2006.01) C07D 233/16 (2006.01) C09K 8/54 (2006.01) C23F 11/10 (2006.01) C23F 11/14 (2006.01) E21B 41/02 (2006.01)

Patent

CA 2075660

POLYBASIC ACID ESTERS AS OIL FIELD CORROSION INHIBITORS Abstract of the Invention 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.

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