METHOD FOR REMOVING HIGH-BOILING HYDROCARBONS FROM SOLVENT FLOWS

摘要

A method for removing high-boiling hydrocarbons from water-soluble solvent flows, wherein said solvent flows are produced in industrial processes which circulate a solvent as a part of the process, and the solvent must be periodically or permanently freed of high-boiling hydrocarbons which influence the quality or the desired properties of the solvent in an unwanted way, and water is added for carrying out the method in a phase separator, so that the high-boiling hydrocarbons are separated off because of their immiscibility with water, and then the water-miscible phase containing water and solvent is returned to the process. According to the invention, the proportion of high-boiling hydrocarbons in circulating solvents in an industrial process can be kept permanently low.

主权项

1. Process for the removal of high-boiling hydrocarbons (20a) from water-soluble solvent streams (1) in an industrial process, in which
a partial stream (15) is withdrawn from a solvent (1) containing accumulated high-boiling hydrocarbons (20a) and fed to a tank (17), and water (18) is added to this partial stream of solvent (15) resulting in the formation of an aqueous (19b) and a non-aqueous phase (19a), and the hydrocarbonaceous phase (19a) is separated (20a) and withdrawn from the tank (17),characterised in that
the aqueous phase (19b) of adequate concentration is returned to the solvent process (20b) without further distillation.