Corrosion inhibitor for alkanolamine units
AssigneeBetzDearborn Inc.
InventorsLjiljana V. Minevski, Sydia B. Anderson, Michael A. Cady
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Abstract
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.
Claims9
A method for inhibiting corrosion of metals in contact with an aqueous alkanolamine solution comprising adding to the aqueous alkanolamine solution a corrosion inhibiting amount of a thiodialkanol effective as a corrosion inhibitor and having the formula:
- S(ROH).sub.2
- where R is C.sub.1 to C.sub.10 alkyl;
- C.sub.6 to C.sub.10 aryl;
- C.sub.3 to C.sub.10 cycloalkyl;
- or C.sub.7 to C.sub.12 aralkyl.
A method for inhibiting corrosion of metals in contact with an aqueous alkanolamine solution in the lean portions of acid gas removal equipment, comprising adding to said aqueous alkanolamine solutions a corrosion inhibiting amount of a thiodialkanol effective as a corrosion inhibitor and having the formula:
- S(ROH).sub.2
- where R is C.sub.1 to C.sub.10 alkyl;
- C.sub.6 to C.sub.10 aryl;
- C.sub.3 to C.sub.10 cycloalkyl;
- or C.sub.7 to C.sub.12 aralkyl.
Dependencies are inferred from the claim text.