CONTROLLING CHILLING TOWER PROFILE FOR DILUTION CHILLING DEWAXING OF 600N WAXY OIL

摘要

The incremental solvent dilution chilling of 600N waxy oils in a staged agitated chilling tower (3) using cold solvent injection is improved in terms of feed filter rate with respect to a 600N waxy oil having a final boiling point of > 600 DEG C and a mean boiling point of about 500 DEG C when the solvent dewaxing process is practiced under conditions of cold solvent injection such that there is an equal chilling rate/stage profile as compared to an equal temperature drop/stage profile in the chilling tower and with respect to a 600N waxy oil having a final boiling point of 600 DEG C and a mean boiling point of about 500 DEG C when the solvent dewaxing process is practiced under conditions of cold solvent injection such that there is an equal temperature drop/stage profile as compared to an equal chilling rate/stage profile in the chilling tower.