Recovery and recycle of dewaxing aid

Details Recovery and recycle of dewaxing aid Recovery and recycle of dewaxing aid

C - Chemistry, Metallurgy

10

G

196/252

C10G 21/00 (2006.01) C10G 73/06 (2006.01)

Patent

CA 1117064

ABSTRACT OF THE DISCLOSURE Dewaxing aid used in a solvent dewaxing process is recovered in wax bottoms from slack wax by vacuum distilling the slack wax to about 5-10 wt. % bottoms at a temperature no greater than about 320°C. The dewaxing aid-containing wax bottoms is recycled back into the dewaxing process by adding same to the wax containing oil feed in an amount ranging from about 0.5-5 wt.%. This has been found to be particularly advantageous when the dewaxing aid is an .alpha.-olefin copolymer, a chlorinated paraffin/naphthalene condensation product and mixture thereof because of their thermal stability.

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