GAS TREATING SOLUTION CORROSION INHIBITOR - COASTAL FLUID TECHNOLOGIES L L

Title:

GAS TREATING SOLUTION CORROSION INHIBITOR

Document Type and Number:

WIPO Patent Application WO1999019539

Kind Code:

A3

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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Inventors:

VELDMAN RAY R (US)
TRAHAN DAVID O (US)

Application Number:

PCT/US1998/021654

Publication Date:

July 01, 1999

Filing Date:

October 14, 1998

Export Citation:

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Assignee:

COASTAL FLUID TECHNOLOGIES L L (US)
VELDMAN RAY R (US)
TRAHAN DAVID O (US)

International Classes:

C01B3/00; C09K3/00; C09K15/20; C10G19/00; C10L3/10; C23F1/00; C23F11/02; C23F11/06; C23F11/10; C23F11/14; C23F; (IPC1-7): C09K3/00; C01B3/00

Foreign References:

US4405584A	1983-09-20
US5654260A	1997-08-05
US5590716A	1997-01-07
US5766548A	1998-06-16

Other References: