Process for producing sulfolane compounds

Details Process for producing sulfolane compounds Process for producing sulfolane compounds

1993-04-16

1994-03-01

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 66, 549 67, C07D33348

Patent

active

052909530

ABSTRACT:
A process for producing sulfolane compounds is provided which comprises: (1) contacting a conjugated diene with sulfur dioxide under conditions sufficient to synthesize a sulfolene compound whereby a mixture of the sulfolene compound and impurities comprising unreacted sulfur dioxide is produced; (2) transferring the mixture, at a temperature in the range of about 55.degree. C. to about 85.degree. C., to an impurities removal reactor containing a solvent; (3) removing the impurities under an elevated pressure to produce an impurities-reduced sulfolene compound; (4) transferring the impurities-reduced sulfolene compound to a hydrogenation reactor; (5) contacting said impurities-reduced sulfolene compound with hydrogen, in the presence of a hydrogenation catalyst, under conditions sufficient to produce a sulfolane compound; and (6) optionally recovering said sulfolane compound.

REFERENCES:
patent: 3417103 (1968-12-01), Warner
patent: 3514469 (1970-05-01), Phillips et al.
patent: 3622598 (1971-11-01), Willis
patent: 3998845 (1976-12-01), Goldstein et al.
patent: 4275218 (1981-06-01), Huxley et al.
patent: 5030737 (1991-07-01), Nash

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