Processes for removing carbon disulfide from symmetrical and asymmetrical sulfide product streams
AssigneeChevron Phillips Chemical Company LP
InventorsKenneth M. Lassen, Michael S. Matson, Daniel M. Hasenberg, Dave C. Schwierman
Life of this patent
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Abstract
Processes for removing carbon disulfide from product streams containing a sulfide compound are performed by contacting the product stream with an alkanolamine and converting the carbon disulfide to a higher boiling point product, thereby reducing or eliminating carbon disulfide from the product stream. Subsequent removal of the higher boiling point product via distillation can lead to a purified sulfide stream with high purity.
Claims26
A process to purify a product stream containing a sulfide compound and CS2, the process comprising:
- (i) contacting the product stream with an alkanolamine to convert at least a portion of the CS2 to a higher boiling point product, wherein the product stream contains at least about 85 wt. % of the sulfide compound;
- and
- (ii) removing at least a portion of the higher boiling point product from the product stream to form a purified sulfide stream.
A process to purify a product stream containing a sulfide compound and CS2, the process comprising:
- (i) contacting the product stream with an alkanolamine to convert at least a portion of the CS2 to a higher boiling point product, wherein the product stream contains:
- at least about 98 wt. % of the sulfide compound;
- and
- from about 100 ppm to about 10,000 ppm of CS2;
- and
- (ii) removing at least a portion of the higher boiling point product from the product stream to form a purified sulfide stream.
Dependencies are inferred from the claim text.