Absorption of mercaptans

Details Absorption of mercaptans Absorption of mercaptans

B - Operations, Transporting

01

D

B01D 53/14 (2006.01)

Patent

CA 2176222

Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e.g., methoxytriglycol, and a secondary monoalkanolamine, e.g., N-methylethanolamine, as well as optionally other amines, e.g., methyldiethanolamine and diethanolamine. The absorption solvents do not require the presence of iodine for removal of mercaptans. Absorption processes utilizing the solvents are also disclosed.

L'invention se rapporte à des solvants d'absorption destinés à extraire les mercaptans de flux de gaz, ces solvants comprenant un alkyléther d'un polyalkylène glycol, par exemple méthoxytriglycol, ainsi qu'une monoalcanolamine secondaire, par exemple N-méthyléthanolamine, et le cas échéant d'autres amines, par exemple la méthyldiéthanolamine et la diéthanolamine. La présence d'iode n'est pas nécessaire pour que ces solvants d'adsorption extraient les mercaptans. L'invention concerne également des procédés d'absorption dans lesquels on utilise ces solvants.

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