Patent ID: 6802960
Filing Date: 2004-10-12
Classification: C10G

Abstract:
A process for the production of a process oil, the process comprising:a) contacting a petroleum distillate with a polar solvent in an extraction column which operates with a bottom temperature of 30 to 80Â° C.; b) withdrawing a primary raffinate from the column of step a), and removing, in a distillation column, 70-100% of the polar solvent from step a) from the primary raffinate; c) contacting the primary raffinate with a polar solvent in an extraction column which operates at a bottom temperature that is higher than the bottom temperature of the extraction column of step a), and in the range of 40 to 90Â° C.; d) withdrawing a secondary extract from the column of step c); and e) removing said polar solvent from said secondary extract.