Conditioning of carbonaceous material prior to physical benefici

Details Conditioning of carbonaceous material prior to physical benefici Conditioning of carbonaceous material prior to physical benefici

1986-05-15

1987-09-22

Pal, Asok

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208309, 208314, 208424, 208426, 208952, 209 3, C10G 1704

Patent

active

046953728

ABSTRACT:
A carbonaceous material such as coal is conditioned by contact with a supercritical fluid prior to physical beneficiation. The solid feed material is contacted with an organic supercritical fluid such as cyclohexane or methanol at temperatures slightly above the critical temperature and pressures of 1 to 4 times the critical pressure. A minor solute fraction is extracted into critical phase and separated from the solid residuum. The residuum is then processed by physical separation such as by froth flotation or specific gravity separation to recover a substantial fraction thereof with reduced ash content. The solute in supercritical phase can be released by pressure reduction and recombined with the low-ash, carbonaceous material.

REFERENCES:
patent: 3607717 (1971-09-01), Reach
patent: 3768988 (1973-10-01), Meyer
patent: 3807557 (1974-04-01), Miller
patent: 3815826 (1974-06-01), Aldrich et al.
patent: 3850477 (1974-11-01), Aldrich et al.
patent: 3909211 (1975-09-01), Diaz et al.
patent: 3938966 (1976-02-01), Kindig et al.
patent: 3960513 (1976-06-01), Agarwal et al.
patent: 4162958 (1979-07-01), Baldwin
patent: 4192731 (1980-03-01), Stearns et al.
patent: 4217201 (1980-08-01), Chervenak
patent: 4248692 (1981-02-01), Knebel et al.
patent: 4388171 (1983-06-01), Corcoran et al.
patent: 4402821 (1983-09-01), Yan
patent: 4426281 (1984-01-01), Meyers et al.
Warzinski et al, Div. of Fuel Chemistry (1985), A. C. S. (Sep. 8-13, 1985), vol. 30, No. 4, pp. 244-249.
Warzinski, ACS, Div. of Fuel Chemistry, vol. 30, No. 3, pp. 139-147 (Sep. 8-13, 1985).
Warzinski and Cavallaro, "Physical Beneficiation of Char and Chemically Conditioning Coal".
C&EN, Nov. 20, 1978, pp. 29-30, "Supercritical Solvents Enhance Coal Liquefaction".

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