B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/347
B01D 53/14 (2006.01) B01D 15/00 (2006.01) C01B 17/05 (2006.01) C10K 1/12 (2006.01)
Patent
CA 1142327
ABSTRACT OF THE DISCLOSURE In the Stretford process wherein hydrogen sulfide, obtained in the catalytic conversion of sulfur compounds, is absorbed into an alkaline solution of the sodium salt of anthraquinone disulfonic acid (ADA) and sodium vanadate, and eventually converted to ele- mental sulfur by a reaction of the sodium vanadate and the hydrogen sulfide, some of the hydrogen sulfide under- goes side reactions and is converted to undesirable by-products, e.g., sodium sulfate and sodium thiosulfate. These by-products were removed in the prior art by burning; however, the expen- sive salts of ADA were also burned in the process of the prior art. In the present improvement, the sodium salts of ADA are preferentially removed in an adsorption column filled with a macroporous adsorption resin, prior to the combustion stage. The adsorption column can be regenerated either with water or with an aqueous solution of sodium carbonate formed in the combustion stage.
346114
Borden Ladner Gervais Llp
Linde Aktiengesellschaft
LandOfFree
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