Apparatus for the production of H.sub.2 S from SO.sub.2 obtained

Details Apparatus for the production of H.sub.2 S from SO.sub.2 obtained Apparatus for the production of H.sub.2 S from SO.sub.2 obtained

1978-11-15

1981-03-10

Turk, Arnold

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422189, 422209, 423242, 423563, B01D 5334, C01B 1716

Patent

active

042553881

ABSTRACT:
This invention is an apparatus and a process for producing gaseous hydrogen sulfide in concentrated form from sulfur dioxide obtained from a dilute gas source by (1) reacting the SO.sub.2 with Na.sub.2 CO.sub.3 to form Na.sub.2 SO.sub.3, (2) reducing the Na.sub.2 SO.sub.3 to Na.sub.2 S, (3) reacting the Na.sub.2 S with NaHCO.sub.3 to form H.sub.2 S and Na.sub.2 Co.sub.3, (4) recycling part of the Na.sub.2 CO.sub.3 to the SO.sub.2 reaction step, (5) reacting the remainder of the Na.sub.2 CO.sub.3 with CO.sub.2 and H.sub.2 O to form NaHCO.sub.3 and (6) recycling the NaHCO.sub.3 to the H.sub.2 S formation reaction.

REFERENCES:
patent: 2936220 (1960-05-01), Bill et al.
patent: 3519815 (1970-07-01), Sandbrook
patent: 3832444 (1974-08-01), Doyle
patent: 3932587 (1976-01-01), Grantham et al.
patent: 3961021 (1976-06-01), Morita et al.
patent: 3972980 (1976-08-01), Lowell
patent: 4079119 (1978-03-01), Nicholson et al.

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