C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/132, 23/343
C01B 17/16 (2006.01) B01D 53/34 (2006.01) C01B 17/20 (2006.01) C10L 3/10 (2006.01)
Patent
CA 2035062
A process for converting carbon disulfide (CS2) to hydrogen sulfide (H2S) in mixtures of H2S and CS2 is provided. The H2S/CS2 mixture is combined with water to form a hydrolysis feed mixture. The hydrolysis feed mixture is passed through a hydrolysis reactor containing e.g., an alumina-based catalyst, wherein a substantial portion of the CS2 is converted to additional H2S. A vapor product comprising H2S, CO2, unreacted H2O, unconverted CS2 and sulfur is formed by the hydrolysis reaction. The vapor product is cooled to form a H2S/CO2 vapor phase and a sour water condensate phase. The H2S/CO2 vapor phase is separated from the sour water condensate phase and subsequently recovered. The sour water condensate phase, which contains small amounts of solid sulfur particles, is optionally then combined with additional CS2 and decanted to form a sulfur-free sour water layer and a CS2 layer containing dissolved sulfur. The sour water layer is recycled and combined with the original H2S/CS2 mixture. The CS2 layer is recycled to a sulfur removal device to remove the sulfur dissolved in the CS2.
Atochem North America Inc.
Atofina Chemicals Inc.
Borden Ladner Gervais Llp
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