Claims
- 1. A method for the production of carbon disulfide from sulfur dioxide removed from a gaseous effluent which includes:
- (a) removing sulfur dioxide as a stream from a flue gas;
- (b) compressing the stream of step (a) and subsequently removing water from said stream;
- (c) blending carbon monoxide and nitrogen with the stream of step (b); the sulfur dioxide in the stream being between about 5-33%;
- (d) introducing the stream of step (c) which consists essentially of nitrogen, carbon monoxide and sulfur dioxide at a temperature between about 500.degree. F. to 900.degree. F. into a first reduction reactor containing a chromium-promoted iron oxide catalyst;
- (e) reducing between 60 to 99+% of the sulfur dioxide to carbonyl sulfide, the remainder being reduced to sulfur;
- (f) discharging a stream from the first reduction reactor, which stream consists essentially of carbonyl sulfide, sulfur, nitrogen and carbon dioxide;
- (g) introducing the stream of step (f) into a second reduction reactor which contains a catalysts of the group consisting of silica-alumina, faujasties and active alumina to decompose a portion of the carbonyl sulfide to form carbon disulfide at a temperature between about 400.degree. F. to 800.degree. F.; and
- (h) recovering the carbon disulfide formed.
- 2. The method of claim 1 which includes blending the carbon monoxide in an amount sufficient to reduce 99+% of the sulfur dioxide to carbonyl sulfide and wherein the stream entering the second reduction reactor consists essentially of carbonyl sulfide, carbon dioxide and nitrogen.
- 3. The method of claim 1 which includes introducing the main stream at a space velocity of between 500 to 60,000 hr.sup.-1 into the first reduction reactor; and
- introducing the blended stream at a space velocity of 500 to 60,000 hr.sup.-1 into the second reduction reactor.
- 4. The method of claim 1 wherein the catalyst in the second reduction reactor is active alumina.
Parent Case Info
This is a continuation, of application Ser. No. 604,091 filed Aug. 13, 1975, now abandoned.
Non-Patent Literature Citations (2)
Entry |
pearson, "Catalysts for Claus Proces", Kaiser Aluminum & Chemical Corporation, Center for Technology, (Oct. 1972). |
Goetz et al., "Catalyst Evaluation for The Simultaneous Reduction of Sulfur Dioxide and Nitric Oxide by Carbon Monoxide, " Industrial Engineering Chemistry Process Design Development, vol. 13, No. 2 (1974). |
Continuations (1)
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Number |
Date |
Country |
Parent |
604091 |
Aug 1975 |
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