C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/00 (2006.01) B01D 53/14 (2006.01) C10G 9/12 (2006.01) C10G 19/00 (2006.01) C10G 29/20 (2006.01) C10G 75/02 (2006.01) C23F 11/02 (2006.01) C23F 11/06 (2006.01)
Patent
CA 2301115
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 formula (I) where R is S or O, and R1, R2, R3 and R4 are independently H, C1 to C8 alkyl, C1 to C8 alkenyl, C6 to C10 aryl, C7 to C12 alkaryl, C7 to C12 aralkyl, C3 to C10 cycloalkyl, C1 to C8 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.
Selon cette invention, on inhibe la corrosion des métaux en contact avec une solution d'alcanolamine dans des unités d'élimination du gaz acide en maintenant dans cette solution une quantité inhibitrice de corrosion d'un composé ayant la formule (I) dans laquelle R représente S ou O, et R¿1?, R¿2?, R¿3? et R¿4? représentent, indépendamment, H, alkyle C¿1? à C¿8?, alcényle C¿1? à C¿8?, aryle C¿6? à C¿10?, alkaryle C¿7? à C¿12?, cycloalkyle C¿3? à C¿10?, thiophène C¿1? à C¿8? ou des groupes amino. L'alcanedithiol est utilisé pour inhiber la corrosion des métaux à la fois dans des parties riches et des parties pauvres en gaz acide de l'unité d'élimination du gaz acide.
Betzdearborn Inc.
Moffat & Co.
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