Method and apparatus for regeneration of the solvents used containing at least one ketone and / or an ester and / or an ether, at least one alcohol and water, and an application in a process for recovery of solvent in the air

摘要

Process and apparatus for regeneration of spent solvents. The apparatus is characterised in that it comprises a distillation column 12 for the solvent to be regenerated at a suitable pressure for separating the ketones and/or esters at the tail 12a of the column, and the alcoholic fraction containing water and possibly contaminated with ketones and/or esters at the head 12b of the column. This column 12 is coupled to a permeation device 14 containing a hydrophilic permeation membrane 16 for dehydrating the alcoholic fraction obtained as distillate from the column 12. The invention makes it possible to regenerate solvents containing ketones and/or esters and/or ethers, alcohols and water in an extremely simple manner. IMAGE