Mineral oils: processes and products – Refining
Patent
1978-06-19
1979-12-25
Crasanakis, George
Mineral oils: processes and products
Refining
208 10, C10G 2114
Patent
active
041804562
ABSTRACT:
A feed slurry containing fine solids, polar liquids and premium liquid oil and produced by high temperature hydrogenation of a solid fuel, such as coal, is separated into a first fraction comprising the premium liquid oil and a second fraction comprising the fine solids and polar liquids by (a) contacting the feed slurry with a solvent, such as (1) C.sub.5 -C.sub.9 aliphatic hydrocarbon (2) C.sub.5 -C.sub.9 alicyclic hydrocarbon or (3) naphthenic or paraffinic fraction of a coal liquefaction product containing less than 10 wt. % aromatics at a temperature of 100.degree.-250.degree. C. and pressure sufficient to maintain the feed slurry and solvent in the liquid state but less than 450 psi. The feed slurry is introduced at or near the top of a contacting zone of a vertical column, which also has an upper settling zone and a lower collection zone, and the solvent is introduced at or near the bottom of the contacting zone of said column at a solvent; slurry wt ratio of at least 0.5:1, or more specifically at a ratio between 0.6:1 and 5:1. The first fraction is recovered as an overflow from the settling zone and the second fraction as an underflow from the collection zone. The column wall defining the collection zone is maintained at a temperature at least 20.degree. C. above the temperature of that portion of the column wall defining the contacting zone, more specifically, the column wall defining the collection zone has a temperature of at least 150.degree. C.
REFERENCES:
patent: 3583900 (1971-06-01), Gatsis
patent: 3970541 (1976-07-01), Williams et al.
patent: 4090957 (1978-05-01), Leonard
Moll Norman G.
Quarderer George J.
Crasanakis George
Plotecher G. R.
The Dow Chemical Company
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