Process and apparatus for regenerating spent solvents containing at least one ketone and/or an ester and/or an ether, at least one alcohol and water, and application in a process for recovery of solvent in 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>