Recovering useful oil from wax filter hot washings and dumped sl

Details Recovering useful oil from wax filter hot washings and dumped sl Recovering useful oil from wax filter hot washings and dumped sl

1977-12-27

1979-09-25

Davis, C.

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 37, 208 38, C10G 4308

Patent

active

041690397

ABSTRACT:
In a DILCHILL* dewaxing process employing rotary drum wax filters, the waxy slurry in the filters must be periodically dumped and the filters washed with hot solvent to remove wax fines which plug the cloth. The dumped slurry contains useful oil which can be recovered, with no detriment to the subsequent filter rate, by mixing the dumped slurry with the hot filter washings and recycling this mixture back into the DILCHILL dewaxing zone at one or more points therein wherein the temperature of the recycled mixture is from about 5.degree. to 50.degree. F. lower than the bulk temperature of the oil in the dewaxing zone and in an amount ranging from about 0.02 to 0.4 volumes of recycle per volume of feed.

REFERENCES:
patent: 3171798 (1965-03-01), Woodle
patent: 3720599 (1973-03-01), Gould
patent: 3764517 (1973-10-01), Bodemuller
patent: 3773650 (1973-11-01), Hislop et al.
patent: 3775288 (1973-11-01), Eagen et al.

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