Purification of halogenated aromatic sulfones or ketones

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

1992-09-30

1993-11-09

Cintins, Marianne M.

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

Organic compounds

Sulfur containing

568 31, 568316, 568332, C07C31506, C07C 4561

Patent

active

052604896

ABSTRACT:
A process for purifying a halogenated aromatic sulfone or ketone compound comprises contacting the compound with a mixture containing a solvent having a normal boiling point less than about 225.degree. C. and water to form a second mixture, heating the second mixture at a temperature sufficient to substantially dissolve the halogenated compound to form a third mixture, cooling the third mixture to purify and recrystallize the compound, and recovering the purified, recrystallized 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: 3770832 (1973-11-01), Leslie et al.
patent: 4303776 (1981-12-01), Baron et al.
patent: 4990678 (1991-02-01), Herd et al.
patent: 5081306 (1992-01-01), Knox

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