Process for producing .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',

Details Process for producing .alpha.,.alpha.,.alpha.,.alpha.',.alpha.', Process for producing .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',

1976-03-29

1977-06-14

Sebastian, Leland A.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

260544D, B01J 110

Patent

active

040295605

ABSTRACT:
This invention concerns to a process for .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexachloroxylene by reacting m-xylene or p-xylene or a partially chlorinated product thereof with chlorine under the irradiation of ultraviolet rays, the process comprising (1) a first-step chlorination reaction which is carried out in the presence of .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexachloroxylene as a solvent added at the initial stage of the reaction, and continued until a compound convertible to .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexachloroxylene by chlorination becomes substantially absent in the reaction mixture, and (2) a second-step chlorination reaction which is continued from the first-step chlorination and carried out to convert difficulty-separable by-products present in the reaction mixture to easily-separable compounds. This invention also concerns to a process for producing an aromatic dicarboxylic acid chloride which comprise reacting the resulting .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexachloroxylene with isophthalic acid or terephthalic acid.

REFERENCES:
patent: 3836445 (1974-09-01), Sano et al.
Clippinger, Chem. Abs., vol. 75, 109648s (1971).
Yamagiwa et al., Chem. Abs., vol. 81, 170326w (1975).

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