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US 11,976,032 B2Granted
Process for preparing S,S′-dialkyldithiocarbonate from dialkyl disulfide
AssigneeArkema France
InventorsPaul-Guillaume Schmitt, Georges Frémy, Gilles-Olivier Gratien
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Abstract
A process for preparing an S,S′-dialkyldithiocarbonate from a dialkyl disulfide and from a particular metal catalyst, in the presence of carbon monoxide is described in addition to the use of S,S′-dialkyldithiocarbonates as reagents for the preparation of polycarbonates, compounds containing at least one urea and/or isocyanate function and compounds containing at least one thioalkyl function.
Claims10
A process for preparing a S,S′-dialkyldithiocarbonate, comprising:
- reacting in the presence of carbon monoxide:
- a dialkyl disulfide chosen from formula (I) below, and mixtures thereof:
- R1—S—S—R2
- wherein R1 and R2, which may be identical or different, are a C1-C12 alkyl group,
- a catalyst comprising a metal chosen from nickel, palladium and platinum,
- and
- optionally in the presence of a solvent or of a mixture of solvents.
4 more elements
Dependencies are inferred from the claim text.