Recovery and recycle of dewaxing aid

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

1978-07-21

1980-03-11

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 38, C10G 4306, C10G 4308

Patent

active

041927320

ABSTRACT:
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.degree. 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
aphthalene condensation product and mixture thereof because of their thermal stability.

REFERENCES:
patent: 1715670 (1929-06-01), Olsen
patent: 1921860 (1933-08-01), Bahlke
patent: 2064506 (1936-12-01), Towne
patent: 2248498 (1941-07-01), Gross et al.
patent: 2612465 (1952-09-01), Kiersted et al.

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