The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2000
Filed:
Oct. 14, 1997
Applicant:
Inventors:
Ray R Veldman, Houston, TX (US);
David O Trahan, Lafayette, LA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C09K / ; C23F / ; C23F / ;
U.S. Cl.
CPC ...
25218828 ; 252390 ; 252393 ; 252394 ; 422-7 ; 422 12 ; 422 14 ; 422 16 ; 507939 ; 507245 ; 507262 ; 507264 ;
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.