Process for recovering deashing solvent from insoluble coal prod

Details Process for recovering deashing solvent from insoluble coal prod Process for recovering deashing solvent from insoluble coal prod

1980-05-22

1982-02-02

Gantz, Delbert E.

Mineral oils: processes and products

Refining

208 8LE, C10G 100

Patent

active

043138195

ABSTRACT:
A process for effecting deashing solvent recovery from insoluble coal products and preparing a slurry of the insoluble products. An elevated temperature and pressure stream comprising insoluble coal products and deashing solvent is admixed with a makeup liquid to dilute the stream. The diluted stream is reduced in pressure and introduced into a first treatment vessel containing sufficient slurry to provide a hydrostatic pressure to prevent boiling of the diluted stream upon entry therein. The solvent then is permitted to flash and cool the remainder of the slurry. A portion of the cooled slurry is recycled to provide the makeup liquid and a second portion is introduced into a second treatment vessel to permit diffusion of solvent infused into the insoluble coal products in the slurry. The slurry of insoluble coal products in the second vessel then is introduced into a thickener to concentrate the slurry and provide a feed suitable for a gasifier.

REFERENCES:
patent: 3607716 (1971-09-01), Roach
patent: 3607717 (1971-09-01), Roach
patent: 3784466 (1974-01-01), Arnold et al.
patent: 4040958 (1977-08-01), Rammler
patent: 4070267 (1978-01-01), Leonard
patent: 4070268 (1978-01-01), Davis et al.
patent: 4119524 (1978-10-01), Leonard et al.
patent: 4162956 (1979-07-01), Rhodes
patent: 4162958 (1979-07-01), Baldwin
patent: 4164466 (1979-08-01), Baldwin
patent: 4177135 (1979-12-01), Rhodes

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