Oxygen scavenging solutions for reducing corrosion by heat stable amine salts
OwnerRay R. Veldman, David Trahaninventors
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Abstract
The formation of amine or glycol degradation products in solutions used to remove acid gases or water from hydrocarbon or inert streams is reduced by adding to the solution an oxygen scavenger in which the effective component is an oxime of the formula: ##STR1## Mixed with a quinone promotor in which R.sub.1 and R.sub.2 are the same or different and are selected from hydrogen or lower alkyl groups of one to six carbon atoms. The addition of the quinone promotor increases the reactivity with oxygen at lower temperatures. The compound may also be as a corrosion inhibitor in gas treating or processing equipment.
Claims14
A method of reducing the formation of amine salts, in an alkanolamine solution for treating light hydrocarbon or gas, wherein said amine salts are formed by the reaction of the solution with carboxylic acids or sulfates formed from reactions of the alkanolamine with oxygen or H.sub.2 S with oxygen comprising reacting an oxime with the oxygen, in the presence of a quinone, by adding to the solution from 0.001 to 50,000 ppm an oxime of the formula ##STR5## in which R.sub.1 and R.sub.2 are the same or different and are selected from hydrogen or lower alkyl groups of one to six carbon atoms.
A method of removing reaction products of alkanolamine and oxygen in an amine solution for treating light hydrocarbons or gas by filtering the alkanolamine solution through activated carbon.
A method of removing reaction products of both oxime and quinone in an alkanolamine solution for treating light hydrocarbons or gas by filtering the alkanolamine solution through activated carbon.
Dependencies are inferred from the claim text.