Oxidation of thiols employing cobalt molybdate/triethylamine catalyst
First Claim
1. A process for the conversion of a thiol represented by the formula ##STR2## wherein R, R1, and R2 can be hydrogen, alkyl, or cycloalkyl containing from 1 to 20 carbon atoms, R and R1 taken together can be an alkylene radical having from 5 to 10 carbon atoms to a corresponding disulfide which comprises subjecting the same to oxidation conditions including air or oxygen-containing gas in the presence of a cobalt oxide molybdenum oxide catalyst on a support and a liquid tertiary amine represented by the formula
where R3 can be any alkyl radical having 1 to 6 carbon atoms.
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Abstract
A thiol is oxidized to a corresponding disulfide employing a supported cobalt molybdate catalyst in combination with a liquid tertiary amine. 2-propanethiol is converted to diisopropyl disulfide with conversions of the order of 94% and selectivities of the order of 98%.
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Citations
7 Claims
- 1. A process for the conversion of a thiol represented by the formula ##STR2## wherein R, R1, and R2 can be hydrogen, alkyl, or cycloalkyl containing from 1 to 20 carbon atoms, R and R1 taken together can be an alkylene radical having from 5 to 10 carbon atoms to a corresponding disulfide which comprises subjecting the same to oxidation conditions including air or oxygen-containing gas in the presence of a cobalt oxide molybdenum oxide catalyst on a support and a liquid tertiary amine represented by the formula
- space="preserve" listing-type="equation">(R.sup.3).sub.3 N
where R3 can be any alkyl radical having 1 to 6 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 6. A process according to claim 1 wherein the tertiary amine is at least one selected from
trimethylamine triethylamine tri-n-propylamine tri-n-butylamine tri-n-pentylamine tri-n-hexylamine methyldiethylamine ethyldipropylamine ethyldimethylamine - 7. A process according to claim 1 wherein the cobalt molybdate catalyst, including support, is employed in the range of from about 0.1 g to about 1 g and the tertiary amine is in the range of from about 1 to about 10 mL employed to convert from about 25 to about 100 mL of the thiol.
Specification