US 11,945,770 B1
Catalytic processes and systems for alkyl sulfide purification
Kenneth M. Lassen, Bartlesville, OK (US); Ugochukwu Nwagwu, Kingwood, TX (US); Jonathan Powell, Amarillo, TX (US); and Daniel M. Hasenberg, Kingwood, TX (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Mar. 6, 2023, as Appl. No. 18/179,188.
Int. Cl. C07C 319/28 (2006.01); B01J 21/04 (2006.01); B01J 23/882 (2006.01); B01J 23/883 (2006.01); C07C 315/06 (2006.01)
CPC C07C 319/28 (2013.01) [B01J 21/04 (2013.01); B01J 23/882 (2013.01); B01J 23/883 (2013.01)] 32 Claims
 
1. A process for purifying an alkyl sulfide composition, the process comprising:
(i) contacting the alkyl sulfide composition comprising carbon disulfide (CS2) and at least 80 wt. % of an alkyl sulfide with water to form an aqueous alkyl sulfide composition;
(ii) contacting the aqueous alkyl sulfide composition with a mixed-metal catalyst at
a temperature in a range of from about 100° C. to about 300° C.,
a pressure in a range of from about 5 psig to about 300 psig,
a molar ratio of water to CS2 in a range of from about 10:1 to about 100:1, and
a weight hourly space velocity (WHSV) in a range of from about 0.05 to about 5; and
(iii) hydrolyzing a least a portion of the CS2 to form a purified alkyl sulfide product stream.