Desulphurization

Details Desulphurization Desulphurization

1987-09-24

1989-09-12

McFarlane, Anthony

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423244, 502 34, 502 56, 55 73, C01B 1704

Patent

active

048658260

ABSTRACT:
Desulphurization of a feedstock using a regenerable sorbent to give a desulphurized stream, regeneration of the sorbent by heating, feedstock, and during at least the initial part of the cooling, at least part of the effluent from the sorbent is contacted with a non-regenerable particulate sorbent. The desired desulphurized product comprises the effluent from the regenerable sorbent that has bypassed the particulate sorbent.
Preferably the heat for regeneration is obtained by heat exchange with the products of combustion of the sulphur laden regeneration fluid.
In an alternative process using a particulate sorbent for a "polishing" operation, the regenerable sorbent is replaced by a membrane separation unit giving a desulphurized stream and a sulphur laden stream, which is combusted to heat, by heat exchange, the desulphurized stream before it passes through the particulate sorbent.

REFERENCES:
patent: 3072458 (1963-01-01), Page
patent: 3384601 (1968-05-01), Price
patent: 3492083 (1970-01-01), Lowicki
patent: 4283212 (1981-08-01), Graham et al.
patent: 4427642 (1984-01-01), Arashi et al.
patent: 4489047 (1984-12-01), de Jorg et al.
patent: 4534943 (1985-08-01), Novak et al.
patent: 4717552 (1988-01-01), Carnell et al.

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