Oil soluble hydrogen permeation inhibitor

A method for inhibiting hydrogen permeation into metal equipment comprising:

• providing a product stream handled by equipment comprising metal in a wet refinery environment, said product stream comprising hydrogen sulfide, ammonia, and cyanide;
• and
• incorporating into said product stream an amount of a composition effective to inhibit said hydrogen permeation, wherein said composition is selected from the group consisting of:
• propanamide, N-[2-[2-[3-(dodecenyl)-2,5-dioxo-1-pyrrolidinyl]ethyl]amino]ethyl]-3-[dodecylthio]-2-methyl;
• 15-thia-5,8,11-triazaheptacosanoic acid, 2-(dodecenyl)-13-methyl-4,12-dioxo;
• and, combinations thereof.

A method for inhibiting permeation of hydrogen into metal equipment comprising:

• providing a product, stream handled by equipment comprising metal in a wet refinery environment, said product stream comprising hydrogen sulfide, ammonia, and cyanide;
• and
• incorporating into said product stream an amount of a composition effective to inhibit said hydrogen permeation, wherein said composition has the following general formula:
• wherein
• n is between about 1-6;
• wherein R1 is a hydrocarbyl group comprising at least about 10 carbon atoms selected from the group consisting of straight, branched, and cyclic alkyl groups, alkenyl groups, and alkynyl groups, aryl groups, alkaryl groups, and aralkyl groups, and heterocyclic alkyl groups containing oxygen or nitrogen as a ring constituent;
• and,
• wherein R2 is selected from the group consisting of hydrogen, nitrogen-containing groups selected from the group consisting of amine groups, amide groups, and cyclic imide groups, wherein a nitrogen of a nitrogen-containing group also comprises a nitrogen of said polyamine, and hydrocarbyl groups having at between about 1-20 carbon atoms selected from the group consisting of straight, branched, and cyclic alkyl groups, alkenyl groups, alkynyl groups, aryl groups, alkaryl groups, and aralkyl groups, and heterocyclic alkyl or alkenyl groups containing oxygen or nitrogen as a ring constituent.

A method for decreasing corrosion and permeation of hydrogen into metal equipment used in wet refinery environments containing hydrogen sulfide, ammonia, and cyanide comprising incorporating into a product stream handled by said equipment an amount of a composition that is effective to inhibit said hydrogen permeation, wherein said composition has the following general formula:

• wherein
• n is between about 1-6;
• wherein R1 is a hydrocarbyl group comprising at least about 10 carbon atoms selected from the group consisting of straight, branched, and cyclic alkyl groups, alkenyl groups, and alkynyl groups, aryl groups, alkaryl groups, and aralkyl groups, and heterocyclic alkyl groups containing oxygen or nitrogen as a ring constituent;
• and,
• wherein R2 is a nitrogen-containing group selected from the group consisting of a cyclic imide group and a hydrocarbyl amide group wherein a nitrogen in said nitrogen-containing group also comprises a nitrogen of said polyamide, and wherein said cyclic imide group further comprises between about 4-6 carbon atoms, and wherein said hydrocarbyl group has between about 1-20 carbon atoms selected from the group consisting of straight, branched, and cyclic alkyl groups, alkenyl groups, and alkynyl groups.