CONTINUOUS PROCESS TO SEPARATE COLOUR BODIES AND/OR ASPHALTHENIC CONTAMINANTS FROM A HYDROCARBON MIXTURE

摘要

Continuous process to separate colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture by passing part of the hydrocarbon mixture through a membrane over which membrane a pressure difference is maintained thereby obtaining ä hydrocarbon permeate having a reduced content of colour bodies and/or contaminants, wherein at regular time intervals the pressure difference over the membrane is substantially lowered.