Methods of mercaptanizing olefinic hydrocarbons and compositions produced therefrom
AssigneeChevron Phillips Chemical Company LP
InventorsMichael S. Matson, Mitchell D Refvik, Eric J Netemeyer, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright
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Abstract
The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
Claims24
A process for forming a polythiol composition, the process comprising:
- 1) contacting
- a) cyclooctadiene;
- b) H2S;
- and
- c) a phosphite compound;
- and
- 2) forming the polythiol composition;
- wherein a molar ratio of H2S to olefinic double bonds of cyclooctadiene is in a range from 10:1 to 500:1.
A polythiol composition derived from cyclooctadiene comprising sulfur-containing compounds, the sulfur-containing compounds comprising:
- i) an average of at least 22 wt. % thiol sulfur;
- and
- ii) an average of from 0.1 to 5 wt. % sulfide sulfur.
A polythiol composition comprising sulfur-containing compounds, wherein:
- the polythiol composition comprises less than 5 wt. % cyclooctadiene;
- and
- the sulfur-containing compounds of the polythiol composition comprise from 60 to 99 wt. % dimercaptocyclooctane.
A polythiol composition comprising sulfur-containing compounds, wherein the sulfur-containing compounds of the polythiol composition comprise:
- at least 50 wt. % dimercaptocyclooctane;
- and
- a total monomercaptocyclooctene and thiabicyclononane content of less than 5 wt. %.
Dependencies are inferred from the claim text.