Alkoxylated polyalkyleneimines, preparation and use

Abstract

Disclosed herein is a method of using a composition including alkoxylated Polyalkyleneimine, the method including using the composition for capturing gases with a pKa greater than 5, from a gas or mixture of gases, the composition being obtained by a process for producing a composition including an alkoxylated polyalkyleneimine including the steps: (a) providing a reaction mixture including (i) a polyalkyleneimine; and (ii) an alkylene oxide; (b) carrying out a reaction between the (i) polyalkyleneimine and the (ii) alkylene oxide at a temperature of at least 50° C.; and (c) optionally diluting the product of step (b), where the mole ratio of alkylene oxide to NH of the polyalkyleneimine in the reaction mixture is from 0.1 to 0.35. Also described herein is a composition including an alkoxylated polyalkyleneimine, which is obtainable by the process.

Dependencies are inferred from the claim text.