Kureha Kagaku Kogyo Kabushiki Kaisha

Masashi Ohtsuru

Satoru Kumazawa

Shiro Yamazaki

Takafumi Shida

Katsumichi Aoki

Toshio Hozumi

Disclosed herein is a process for producing 2,5-dichlorotoluene which is useful as a monomer of heat-resistant polymers and an intermediate raw material for medicines, agricultrual chemicals and various organic synthetic substances, the process giving 2,5-dichlorotoluene at a high selectivity and in a high yield and comprising the steps of chlorinating 4-t-alkyltoluene or 4-isopropyltoluene in the presence of a catalyst, thereby obtaining a 2,5-dichlorocompound, and bringing the formed 2,5-dichlorocompound into contact with toluene in the presence of a catalyst, thereby subjecting the 2,5-dichlorocompound to transalkylation.

Process for producing 2,5-dichlorotoluene

Novel N-benzoly-N'-halogenoloweralkylidenehydrazine derivatives of the general formula ##STR1## (in which X represents Cl or Br, and Y represents H, F, Cl, Br, CH.sub.3 or CHCl--CH.sub.3, provided that when X is Cl, Y is the above-defined member other than Cl).

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Iwaki, Japan

Masashi Ohtsuru