Methods for the production of sulfurized diphenyloxides and compositions made therefrom
AssigneeExxonMobil Chemical Patents Inc.
InventorsMargaret M. Wu, Philip Trotto, Rene B. LaPierre
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Abstract
The present invention relates to methods for production of sulfurized diphenyloxides wherein a diphenyloxide is reacted with elemental sulfur in the presence of solid acid catalyst. The solid acid catalyst can be a zeolite or a catalytic amount of a Friedel-Crafts compound. The present invention further relates to a composition containing between about 40 and about 80 weight percent diphenyloxide; no more than about 15 weight percent diphenyloxide thiol; between about 5 and about 45 weight percent phenoxathiin; and between about 3 and about 50 weight percent total of bis(diphenyloxide) sulfide, diphenyloxide phenoxathiin sulfide, and bis(phenoxathiin) sulfide.
Claims23
A method for the production of a sulfurized diphenyloxide comprising a sulfurization step of reacting a diphenyloxide with elemental sulfur in the presence of a solid acid catalyst, wherein the solid acid catalyst is a molecular sieve.
The method of claim 7 wherein the sulfurization step is conducted at a temperature above about 75° C.
A method for producing a stock solution, the method comprising the steps of reacting a diphenyloxide with elemental sulfur in the presence of a solid acid catalyst;
- and reacting the diphenyloxide with an alkylating agent to produce the stock solution, wherein the solid acid catalyst is a molecular sieve.
A composition comprising, in weight percent, about:
- Diphenyloxide 40-80 Diphenyloxide thiol 0-15 Phenoxathiin 5-45 Bis(diphenyloxide) sulfide + 3-50. Diphenyloxide phenoxathiin sulfide + Bis(phenoxathiin) sulfide
A method for producing a stock solution, the method comprising the steps of reacting a diphenyloxide with elemental sulfur in the presence of a solid acid catalyst;
- and reacting the diphenyloxide with an alkylating agent to produce the stock solution.
Dependencies are inferred from the claim text.