Method of making .alpha.-chloroxylenes

Details Method of making .alpha.-chloroxylenes Method of making .alpha.-chloroxylenes

1998-12-10

2000-09-12

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

570207, 570208, 570209, 570210, C07C 1700, C07C 2200, C07C 2500

Patent

active

061172782

ABSTRACT:
Disclosed is a method for making high purity .alpha.-chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring halogenated benzotrichloride, benzotrifluoride, ring halogenated benzotrifluoride, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluorometaxylene, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluoroparaxylene, or a mixture thereof. The composition is heated to about 70 to about 160.degree. C. No base is present in the composition. Chlorine gas is sparged through the composition and chlorine free radicals are generated therein. The chlorine free radicals can be generated either with UV light or by means of a chlorine free radical initiator.

REFERENCES:
patent: 3442960 (1969-05-01), De Puy et al.
patent: 4048033 (1977-09-01), Yoshinaka et al.
patent: 5080767 (1992-01-01), Ando et al.
patent: 5145996 (1992-09-01), Jacobson et al.

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