Abstract: A selective isolation of m-dichlorobenzene is carried out at a high efficiency by bringing an isomeric mixture containing m- and o- and/or p-dichlorobenzenes into contact with an absorbing material comprising a TPZ-3 type zeolite consisting of at least one aluminosilicate compound of the formula (I):M.sub.2/n O.multidot.Al.sub.2 O.sub.3 .multidot..sub.x SiO.sub.2 .multidot..sub.m H.sub.2 O (I)wherein M = a mono or di-valent cation, for example, H.sup.+, Li.sup.+ or Na.sup.+, n=1 or 2, x=10 or more, and m=0 or 1 or more, to selectively absorb dichlorobenzene by the absorbing material, and then, by collecting the non-absorbed fraction of the isomeric mixture.

Abstract: A method for selectively separating 2,6-dichlorotoluene from a mixture of dichlorotoluene isomers by means of a zeolite adsorber, characterized in that a zeolite selected from the group consisting of ZSM-5 zeolite, ZSM-8 zeolite, ZSM-11 zeolite, ZSM-21 zeolite, ZSM-35 zeolite, Zeta-1 zeolite, Zeta-3 zeolite and TPZ-3 zeolite, is used as the adsorber to selectively separate 2,6-dichlorotoluene as a non-adsorbed component.

Abstract: A method for selective separation of 2,6-dichlorotoluene from a mixture of dichlorotoluene isomers by means of a zeolite-type adsorbent, wherein ZSM-5 type zeolite is used as the adsorbent for selectively separating 2,6-dichlorotoluene as a non-adsorbed component.

Abstract: A herbicidal composition comprises a novel compound of benzamide derivative having the formula ##STR1## wherein R represents a C.sub.1 -C.sub.8 alkyl group; X represents oxygen or sulfur atom and n is an integer of 1 or 2.