Patent ID: 9211495
Filing Date: 2015-12-15
Classification: B01D,C07C,Y02P

Abstract:
1. A method of absorbing acidic compounds contained in a gaseous effluent, comprising: bringing a gaseous effluent containing acidic compounds into contact with a solution comprising: a) at least one amine selected from the group consisting of N,N,N′,N′,N″-pentamethyldiethylenetriamine, piperazine, monoethanolamine, diethanolamine, methyldiethanolamine, diisopropanolamine, diglycolamine, a glycine salt and a taurine salt, b) water, c) at least one degradation-inhibiting compound for limiting the degradation of said amine, said degradation-inhibiting compound corresponding to one of the following general formulas: in which X is selected from a hydrogen atom, an alkali or alkaline-earth element, a monovalent or multivalent metal, NH a phosphonium cation, in which each of the radicals R 1 , R 2 and R 3 is selected independently from: a hydrogen atom, a hydrocarbon radical comprising 1 to 12 carbon atoms, a radical  in which W is selected from a sulfur atom and an oxygen atom and Y is selected from: and in which each of the radicals R 4 and R 5 is selected independently from: a hydrogen atom, a hydrocarbon radical comprising 1 to 12 carbon atoms.