Purification of halogenated aromatic sulfones or ketones

Details Purification of halogenated aromatic sulfones or ketones Purification of halogenated aromatic sulfones or ketones

1989-12-08

1991-02-05

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

568324, C07C31506, C07C 4980

Patent

active

049906780

ABSTRACT:
A process for purifying a halogenated aromatic sulfone or ketone compound comprising contacting the compound with a solvent having a normal boiling point less than about 225.degree. C. to form a mixture, heating the mixture to a temperature above the normal boiling point of the solvent in a closed system to form a solution, cooling the solution to recrystallize the compound, and recovering the compound. A second embodiment of the invention comprises repeating the purification process steps at least once to further purify the halogenated aromatic sulfone or ketone compound.

REFERENCES:
patent: 3334146 (1967-08-01), Pitt et al.
patent: 3726927 (1973-04-01), Leslie et al.
patent: 3770832 (1973-11-01), Leslie et al.
patent: 4016210 (1977-04-01), Horner et al.
patent: 4303776 (1981-12-01), Baron et al.
patent: 4873372 (1989-10-01), Schaefer et al.

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