Filtration in solvent dewaxing with continuous spraying of filte

Details Filtration in solvent dewaxing with continuous spraying of filte Filtration in solvent dewaxing with continuous spraying of filte

1991-06-12

1993-03-02

Drodge, Joseph W.

Liquid purification or separation

Processes

Separating

208 33, 208 38, 210784, 210797, C10G 7306, C10G 7310

Patent

active

051906732

ABSTRACT:
An improved solvent dewaxing process in which a method and apparatus for continuous hot wash of a dewaxing filter is disclosed. A hot wash solvent is continuously sprayed below the doctor blade followed by a cold solvent spray below the hot solvent spray. Additionally, a solvent management process for changing the proportions of the solvent in response to different viscosity feedstocks thereby increasing filtration efficiency is also disclosed.

REFERENCES:
patent: 1874972 (1932-08-01), Hall
patent: 2040056 (1936-05-01), Manley
patent: 2048244 (1936-07-01), Bray et al.
patent: 2081296 (1937-05-01), Gard
patent: 3791525 (1974-02-01), Harris et al.
patent: 4820400 (1989-04-01), Ryan et al.
Hobson, G. D. (ed.), Modern Petroleum Technology, 4th ed., pp. 427-429 (Date Unknown).
Hengstebeck, R. J., Petroleum Processing Principles and Applications, pp. 256-257 (1959).

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