Gas treating solution corrosion inhibitor

Details Gas treating solution corrosion inhibitor Gas treating solution corrosion inhibitor

1997-10-14

2000-05-09

Tucker, Philip

Compositions

Reductive bleachant, deoxidant, reductant, or generative

Deoxidant or oxygen scavenging

252390, 252393, 252394, 422 7, 422 12, 422 14, 422 16, 507939, 507245, 507262, 507264, C01B 300, C09K 300, C23F 1100, C23F 1104

Patent

active

060599928

ABSTRACT:
Corrosion in aqueous alkanolamine, physical solvents, or combination of alkanolamine and physical solvent solutions used to remove acid gases from natural gas, synthetic gas, or light hydrocarbon streams can be reduced by addition of mixtures of oxygen scavengers or mixtures of oxygen scavengers and sodium molybdate. The oxygen scavengers must be promoted to reduce metal surfaces in contact with the solutions to a more passive, harder, and insoluble form at the operating temperature of the treating system. The sodium molybdate provides additional passivation especially in the imperfections on the surface of the metal where corrosion accelerates.

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