Filtration of a coal liquid slurry using an ethylene vinyl aceta

Details Filtration of a coal liquid slurry using an ethylene vinyl aceta Filtration of a coal liquid slurry using an ethylene vinyl aceta

1979-05-07

1981-02-24

Wyse, Thomas G.

Liquid purification or separation

Processes

Separating

210778, 210727, 208 8LE, 210732, B01D 3702, C10G 104

Patent

active

042526469

ABSTRACT:
The rate of filtration of a coal liquid slurry is increased by adding an ethylene vinyl acetate copolymer and an alcohol containing 2 to 10 carbon atoms to the slurry prior to filtration or by adding the alcohol to the slurry and washing a precoat cake of filter aid with an oil solution of ethylene vinyl acetate copolymer prior to filtration. Although the ethylene vinyl acetate copolymer and the alcohol each provides a filter rate improving effect when used alone, a synergistic improvement in filtration rate is achieved by their combined use.

REFERENCES:
patent: 3242073 (1966-03-01), Guebert et al.
patent: 3492225 (1970-11-01), Ryznar
patent: 3715336 (1973-02-01), Nowak et al.
patent: 4029567 (1977-06-01), Farnard et al.
patent: 4030893 (1977-06-01), Keller
patent: 4046690 (1977-09-01), Rodgers
patent: 4079004 (1978-03-01), Tan et al.
patent: 4094770 (1978-06-01), Bose
patent: 4141691 (1979-02-01), Antonetti et al.
patent: 4156649 (1979-05-01), Quinn et al.

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