Corrosion inhibitor for alkanolamine units

Details Corrosion inhibitor for alkanolamine units Corrosion inhibitor for alkanolamine units

1995-07-20

1997-07-01

Gibson, Sharon

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

422 7, 422 13, 422239, 25238962, 423228, 423229, C23F 1100, C09K 1300

Patent

active

056435347

ABSTRACT:
A method for inhibiting corrosion of metals in contact with an aqueous alkanolamine solution in an amine unit for removing of acid gases from a hydrocarbon, comprising adding to the solution a sufficient amount of a corrosion-inhibiting composition comprising a blend of salicylic acid with a reaction product of maleated tall oil fatty acid polyhydroxy polyalkane and ammonium or potassium hydroxide; tallow diamine quaternary dichloride or alkanediol or mixtures thereof, and alkanol or alkanolamine. The blend may be diluted in water and may optionally include an antifoam material.

REFERENCES:
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patent: 4062764 (1977-12-01), White et al.
patent: 4120655 (1978-10-01), Crambes et al.
patent: 4466946 (1984-08-01), Goddin, Jr. et al.
patent: 4730079 (1988-03-01), Hofinger et al.
patent: 4927669 (1990-05-01), Knox et al.
patent: 5292480 (1994-03-01), Fischer et al.
Copending U.S. Patent Application Ser. No. 08/504,635, "Oxygen Induced Corrosion Inhibitor Compositions", by Minevski, filed Jul. 20, 1995.

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