Process for the catalytic production of dichlorotoluenes

Details Process for the catalytic production of dichlorotoluenes Process for the catalytic production of dichlorotoluenes

1975-09-10

1977-02-01

Horwitz, D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 2504

Patent

active

040061957

ABSTRACT:
An improved process for the catalytic production of dichlorotoluenes, especially 2,4-dichlorotoluene, formed by reacting para-chlorotoluene with chlorine in the presence of a catalyst to form a mixture of chlorinated toluenes and thereafter separating from said mixture a dichlorotoluene fraction containing 2,4-dichlorotoluene, the improvement comprising reacting para-chlorotoluene in the liquid phase with chlorine gas in the presence of antimony trichloride catalyst. The mixed chlorotoluene product obtained contains in excess of 85% 2,4-dichlorotoluene, which mixture is then treated with a base, catalyst is removed by separation or filtration and the remaining product is distilled to yield a substantially pure 2,4-dichlorotoluene product.

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patent: 2608591 (1952-08-01), Lawlor
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patent: 3714274 (1973-01-01), Rosenberg
patent: 3752856 (1973-08-01), Nagy et al.
Kovacic et al., J. Am. Chem. Soc. 76, 5491-5494, (1954).

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