Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound
Patent
1979-01-22
1980-12-23
Vertiz, O. R.
Chemistry of inorganic compounds
Sulfur or compound thereof
Binary compound
423427, 423242, 162 30K, 162 36, 423DIG3, C01B 1700, C01B 1716, D21C 1102, D21C 1112
Patent
active
042410410
ABSTRACT:
An improved method for recovering sulfur from flue gas which contains sulfur dioxide formed from burning sulfur containing fuels. The method first involves the reduction burning of auxilary fuel in the presence of sodium sulfite to convert it to smelt containing sodium sulfide and sodium carbonate. The smelt is dissolved, and the solution reacted with carbon dioxide, hydrogen sulfide and water vapor forming sodium hydrosulfide. The sodium hydrosulfide is reacted with a high concentration of recycled sodium bicarbonate and stripped with carbon dioxide to form sodium carbonate and release the sulfides as hydrogen sulfide from the stripper. The hydrogen sulfide released is then converted to sulfur dioxide, sulfuric acid or elemental sulfur. Pressurized carbon dioxide is used for pressure carbonation of recycled solution from the stripper to convert the sodium carbonate to the high concentration of recycled sodium bicarbonate used for stripping. The sodium carbonate and sodium bicarbonate from the stripper are reacted under pressure with sodium bisulfite in a decarbonator to form sodium sulfite and release carbon dioxide under pressure for use in the pressure carbonation. A portion of the sodium sulfite formed by decarbonation is then reduced in the smelter. The balance of the sodium sulfite is then used for absorption of the sulfur dioxide from the flue gas forming the sodium bisulfite used for decarbonation.
REFERENCES:
patent: 2656245 (1953-10-01), Gray et al.
patent: 2864669 (1958-12-01), Ahlborg et al.
patent: 3402992 (1968-09-01), Ahlborg
patent: 3508863 (1970-04-01), Kimidki et al.
patent: 3826710 (1974-07-01), Anderson
patent: 4049787 (1977-09-01), Romantschuk et al.
patent: 4083930 (1978-04-01), Kohl et al.
patent: 4141961 (1979-02-01), Miller
patent: 4148684 (1979-04-01), Farin
MEI Systems Inc.
Straub Gary P.
Vertiz O. R.
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