METHOD FOR THE SEPARATION AND PURIFICATION OF CARBON MONOXIDE FROM GAS MIXTURES USING IONIC LIQUIDS

The present invention contemplates a capture solution of carbon monoxide (co) comprising an ionic liquid, formed by a cation and an anion and a capture compound, where the anion of the ionic liquid (a) is not an element belonging to the group of the halogens (group 17) and where the capture compound (b) is a transition metal salt selected from those which can form reversible complexes with the co. It also contemplates a method for capturing and separating carbon monoxide (co) gas from a gas stream, comprising i) contacting the gaseous stream containing co with the capture solution of the invention, which eliminates the co of said current, ii) the selective and reversible reaction between the co and the transition metal salt, and iii) the regeneration of the capture solution and the recovery of the co contained therein. (Machine-translation by Google Translate, not legally binding)