Heat-efficient method for dewatering solids

Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor

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44 27, 208 8R, F26B 300

Patent

active

042234492

ABSTRACT:
Water is removed from a hydrocarbonaceous solid such as peat by contacting the solid with a liquid solvent relatively free of moisture such as benzene or toluene at elevated temperatures, i.e. 200.degree.-600.degree. F. and preferably at elevated pressures to prevent excessive volatilization, i.e. pressures of about 1 to about 100 atmospheres, to transfer at least a portion of the moisture in the solid to the solvent. The solvent is further characterized by its relative inability to dissolve appreciable amounts of water at low or ambient temperatures and its ability to dissolve substantially greater amounts of water at higher temperatures, i.e. 200.degree.-600.degree. F. After the solids are contacted with the solvent and while the solids and solvent are still at an elevated temperature, at least a portion of the solvent, now containing dissolved water, is removed from the solids to provide a product solids having a diminished water content. The removed liquid stream, containing solvent and water, is then cooled to a lower temperature, i.e. less than 150.degree. F., thereby causing the water to separate from the solvent as a separate phase and to provide a liquid solvent stream relatively free of moisture suitable for reuse in extraction of water from the solids. This system of moisture removal is particularly useful when a slurry of a solid in a solvent is to be prepared for passage to a high pressure reactor.

REFERENCES:
patent: 1794865 (1931-03-01), Pier et al.
patent: 1863669 (1932-06-01), Pier et al.
patent: 1881968 (1932-10-01), Pier et al.
patent: 2610115 (1952-09-01), Lykker
patent: 3327402 (1967-06-01), Lamb et al.
patent: 3520067 (1970-07-01), Winegartner
patent: 3552031 (1971-01-01), Evans et al.
patent: 3953927 (1976-05-01), Hoffert
patent: 4014104 (1977-03-01), Murphy

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