Hodogaya Chemical Co., Ltd.

Kikuo Otomo

Yutaka Sato

Susumu Suzuka

Masami Ito

Michihiro Gonda

Mikiko Kanasugi

Hiroki Tokunaga

Katsumasa Kitsukawa

Masashi Yamagushi

A method for separating a trihalogenobenzene isomer from a mixture of at least two trihalogenobenzene isomers selected from the group consisting of 1,2,3-, 1,2,4- and 1,3,5-substituted isomers among trihalogenobenzenes represented by the formula: ##STR1## wherein X is Cl or Br, by means of a zeolite adsorber, characterized in that a ZSM-zeolite is used as the adsorber.

Method for separating a trihalogenobenzene isomer

A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR1## where each of R.sub.1 and R.sub.2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.

Heat sensitive record material

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Toride, Japan

Kikuo Otomo