Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound
Patent
1990-11-26
1992-02-18
Langel, Wayne A.
Chemistry of inorganic compounds
Sulfur or compound thereof
Binary compound
423437, 423572, C01B 1716
Patent
active
050892460
ABSTRACT:
A process for converting carbon disulfide (CS.sub.2) to hydrogen sulfide (H.sub.2 S) in mixtures of H.sub.2 S and CS.sub.2 is provided. The H.sub.2 S/CS.sub.2 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 CS.sub.2 is converted to additional H.sub.2 S. A vapor product comprising H.sub.2 S, CO.sub.2, unreacted H.sub.2 O, unconverted CS.sub.2 and sulfur is formed by the hydrolysis reaction. The vapor product is cooled to form a H.sub.2 S/CO.sub.2 vapor phase and a sour water condensate phase. The H.sub.2 S/CO.sub.2 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 CS.sub.2 and decanted to form a sulfur-free sour water layer and a CS.sub.2 layer containing dissolved sulfur. The sour water layer is recycled and combined with the original H.sub.2 S/CS.sub.2 mixture. The CS.sub.2 layer is recycled to a sulfur removal device to remove the sulfur dissolved in the CS.sub.2.
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Atochem North America, Inc.
Langel Wayne A.
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