C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 17/54 (2006.01) C01B 17/50 (2006.01) F23C 9/00 (2006.01)
Patent
CA 2387875
Production of sulfur dioxide by means of the combustion of sulfur and pure oxygen in a closed system that produces a high yield in the recovery of SO2 and reduces environmental contamination to levels below the standard requirements. Sulfur dioxide is produced by burning sulfur and pure oxygen diluted in recirculated combustive gas that has been previously cooled in order to maintain combustion at less than 1200°C. The gaseous mix thus obtained would be comprised of approximately 16% V/V oxygen and 84% V/V of SO2. This latter percentage makes it very easy to liquefy SO2 so that a 95% SO2 recovery efficiency would be obtained at -10°C. The non-liquefied gas is recirculated in a closed system. The SO2 content in the 84% V/V SO2 gas could even be liquefied at 20°C, at 5 bar, thus increasing the system's efficiency even further.
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