Three catalytic reactor extended claus process and apparatus

Details Three catalytic reactor extended claus process and apparatus Three catalytic reactor extended claus process and apparatus

C - Chemistry, Metallurgy

01

B

23/332

C01B 17/04 (2006.01)

Patent

CA 1303331

ABSTRACT Sulfur is recovered in a Claus process sulfur recovery plant comprising a thermal reaction zone and three Claus catalytic conversion zones, the first Claus catalytic conversion zone being operated as a high temper- ature Claus converter, and the second and third Claus catalytic reaction zones being operated alternately as high temperature converters and as adsorption-type con- verters. After regeneration, the freshly regenerated reaction zone is preconditioned to further reduce residual sulfur loading of at least a substantial portion of the catalyst therein and then is switched into the final posi- tion where the low sulfur loading on such portion facili- tates a high average recovery of sulfur on the order of about 99.1% to 99.25%.

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