Process of treating the gasification residue formed by the gasif

Details Process of treating the gasification residue formed by the gasif Process of treating the gasification residue formed by the gasif

1995-03-23

1997-06-03

Straub, Gary P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423563, 4235663, 44620, 201 17, 201 45, C01B 1716, C10B 5700

Patent

active

056351470

ABSTRACT:
In addition to ash and coke, the gasification residue contains alkaline earth metal sulfide and alkaline earth metal oxide because desulfuring agents have been supplied to the gasifier. At temperatures from 5.degree. to 80.degree. C. the gasification residue is mixed with an acid-containing aqueous solution so that a gas which is rich in H.sub.2 S is produced. Ash, coke, and alkaline earth metal salt are supplied to a flotation zone, in which coke is separated. A solid residue which contains ash and alkaline earth metal salt is withdrawn from the flotation zone. Carbonic acid or dilute sulfuric acid is preferably used as an acid.

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