Corrosion inhibitor
AssigneeMobil Oil Corporation
InventorsBruce D. McLaughlin, Tsoung Y. Yan
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Abstract
A corrosion inhibitor is disclosed which is produced by reacting an aqueous alkanolamine solution with an acid gas to form an amide and an alkanolamine salt, mixing aqueous alkanolamine with said amide and said alkanolamine salt in the absence of added inorganic base, and reacting the mixture at elevated temperature.
Claims9
A method of decreasing the rate of corrosive attack of a liquid solution on ferrous metal-containing equipment of a petroleum refining unit said method comprising adding a corrosion inhibitor produced by the reaction of (a) an aqueous alkanolamine solution containing from about 10 to about 98 weight percent alkanolamine;
- with (b) the degradation products formed by reacting said alkanolamine with an acid gas;
- in the absence of added inorganic base at elevated temperatures of from about 180 to about 350 degrees Celsius for a reaction time of from about 0.1 to about 20 hours to produce a substantially water-free product, to said liquid solution in concentrations of from about 0.1 to about 8.0 weight percent.
A method for disposing of a liquid hazardous waste stream containing an alkanolamine and degradation products formed by contacting said alkanolamine with an acid, said method comprising reacting said hazardous waste stream at elevated temperature of from about 180.degree. to about 350.degree. C. in the absence of added inorganic base for reaction time of from about 0.1 to about 20 hours to vaporize water from said hazardous waste stream to produce a substantially water-free product.
Dependencies are inferred from the claim text.