Method of dehydrating the solvent resulting from a process step

Details Method of dehydrating the solvent resulting from a process step Method of dehydrating the solvent resulting from a process step

1993-06-22

1995-09-05

Pal, Asok

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208187, 208321, 203 14, 203 17, C10G 7310, C07C 5144

Patent

active

054476208

ABSTRACT:
A method of dehydrating a solvent originating from a hydrocarbon dewaxing operation, wherein a moist composite organic solvent, for example a moist MEK/toluene mixture is dehydrated in a first distillation zone, the resulting first distillate is contacted with water to form two phases one of which, rich in organic solvent, is returned as a reflux to the first distillation zone whereas the other phase rich in water is distilled in a second distillation zone, and the head product and one portion of the bottom product of the second distillation zone are returned to the zone of contact between the first distillate and water, the invention being applicable to the dewaxing of lubricating oils.

REFERENCES:
patent: 2655468 (1953-10-01), Greene
patent: 4033855 (1977-07-01), Putz
patent: 4088564 (1978-05-01), Perry et al.
patent: 4088565 (1978-05-01), Watts et al.
patent: 4186059 (1980-01-01), Fleck
patent: 4354921 (1982-10-01), Pitman et al.
patent: 4898674 (1990-06-01), Pasternak et al.
Perry's Chemical Engineers' Handbook, Perry et al., editors, Sixth Edition, pp. 13.5-13.15, McGraw-Hill (1984).
Le Petrole, Raffinage et Genie Chimique, pp. 641-649, P. Wuithier, 1965.

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