Process for producing sulfolane compounds

Details Process for producing sulfolane compounds Process for producing sulfolane compounds

1993-09-28

1994-09-13

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 87, C07D33308, C07D33348

Patent

active

053470184

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 to an impurities removal vessel containing a freezing point depressant which comprises an aromatic compound; (3) removing the impurities; (4) transferring the impurities-reduced sulfolene compound to a hydrogenation reactor; (5) contacting the 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 the sulfolane compound.

REFERENCES:
patent: 2578565 (1951-12-01), Mahan et al.
patent: 3622598 (1971-11-01), Willis
patent: 4132683 (1979-01-01), Larsen et al.
patent: 5030737 (1991-07-01), Nash

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