Corrosion inhibitor for alkanolamine units

Details Corrosion inhibitor for alkanolamine units Corrosion inhibitor for alkanolamine units

1997-08-22

1999-03-23

Kelly, C. H.

Compositions

Preservative agents

Anti-corrosion

252390, 252395, 422 7, 208207, 208236, 208 47, C09K 300, C23F 1100, C10G 2900

Patent

active

058854878

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 compound having the formula: ##STR1## where R is S or O, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently H, C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.8 alkenyl, C.sub.6 to C.sub.10 aryl, C.sub.7 to C.sub.12 alkaryl, C.sub.7 to C.sub.12 aralkyl, C.sub.3 to C.sub.10 cycloalkyl, C.sub.1 to C.sub.8 thiophene, or amino groups. The alkanedithiol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.

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