Methods of Mercaptanizing Olefinic Hydrocarbons and Compositions Produced Therefrom
AssigneeChevron Phillips Chemical Company LP
InventorsMichael S. Matson, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright, Mitchell D. Refvik, Eric J. Netemeyer
Life of this patent
Estimating the term…
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.
Claims27
A process for forming a polythiol composition, the process comprising:
- 1) contacting
- a) a hydrocarbon compound having at least two olefinic double bonds;
- b) H2S;
- and
- c) a phosphite compound;
- and
- 2) forming the polythiol composition;
- wherein a molar ratio of H2S to olefinic double bond of the hydrocarbon compound is in a range from 10:1 to 500:1.
3-17. (canceled)
A polythiol composition derived from cyclododecatriene comprising sulfur-containing compounds, the sulfur-containing compounds of the polythiol composition comprising:
- i) an average of at least 20 wt. % thiol sulfur;
- and
- ii) an average of from 0.1 to 8 wt. % sulfide sulfur.
A polythiol composition derived from trivinylcyclohexane comprising sulfur-containing compounds, the sulfur-containing compounds of the polythiol composition comprising:
- i) an average of at least 20 wt. % thiol sulfur;
- and
- ii) an average of from 0.1 to 8 wt. % sulfide sulfur.
24-25. (canceled)
A polythiol composition comprising sulfur-containing compounds, wherein the sulfur-containing compounds of the polythiol composition comprise:
- from 30 to 85 wt. % tri(2-mercaptoethyl)cyclohexane;
- and
- from 10 to 60 wt. % di(2-mercaptoethyl)vinylcyclohexane.
A process for forming a polythiol composition, the process comprising:
- 1) contacting
- a) trivinylcyclohexane;
- b) H2S;
- and
- c) a phosphite compound;
- and
- 2) forming the polythiol composition;
- wherein a molar ratio of H2S to olefinic double bonds of trivinylcyclohexane is in a range from 10:1 to 500:1.
Dependencies are inferred from the claim text.