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US 10,927,074 B2Granted
Synthesis of methyl ethyl sulfide and related production systems
AssigneeChevron Phillips Chemical Company LP
InventorsDaniel M. Hasenberg, Kenneth M. Lassen, Jason L. Kreider, Henry Hwu
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Abstract
The present invention discloses processes for producing methyl ethyl sulfide by contacting dimethyl sulfide and diethyl sulfide in the presence of a suitable catalyst. Methyl ethyl sulfide can be used as an odorant in natural gas. Integrated mercaptan and sulfide manufacturing systems and integrated methods for making mercaptans and sulfides also are disclosed.
Claims21
An integrated mercaptan and sulfide manufacturing system comprising:
- (i) a mercaptan production system capable of producing methyl mercaptan and dimethyl sulfide from methanol and H2S, and capable of producing ethyl mercaptan and diethyl sulfide from ethanol and H2S;
- (ii) a DMDS production system for consuming at least a portion of the methyl mercaptan from the mercaptan production system, wherein the DMDS production system is capable of producing dimethyl disulfide from the methyl mercaptan;
- (iii) an ETE production system for consuming at least a portion of the ethyl mercaptan from the mercaptan production system, wherein the ETE production system is capable of producing ethylthioethanol from the ethyl mercaptan;
- and
- (iv) a MES production system for consuming at least a portion of the dimethyl sulfide and the diethyl sulfide from the mercaptan production system, wherein the MES production system is capable of producing methyl ethyl sulfide from the dimethyl sulfide and the diethyl sulfide.
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An integrated method for producing mercaptans and sulfides, the method comprising:
- (a) reacting methanol and H2S to form methyl mercaptan and dimethyl sulfide;
- (b) reacting ethanol and H2S to form ethyl mercaptan and diethyl sulfide;
- (c) reacting at least a portion of the methyl mercaptan with hydrogen peroxide and sodium hydroxide to form dimethyl disulfide;
- (d) reacting at least a portion of the ethyl mercaptan with ethylene oxide to form ethylthioethanol;
- and
- (e) reacting at least a portion of the dimethyl sulfide and the diethyl sulfide to form methyl ethyl sulfide.
3 more elements
Dependencies are inferred from the claim text.