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 process for producing 2,6-dichlorobenzyl alcohol, which comprises reacting 2,6-dichlorobenzyl chloride with an acetate-forming agent to form its acetate, followed by hydrolysis to obtain 2,6-dichlorobenzyl alcohol, wherein anhydrous sodium acetate is used as the acetate-forming agent, and a quaternary ammonium salt is added as a phase transfer catalyst during the acetate-forming reaction.

Abstract: Para-chlorotoluene is prepared selectively at high yield by nuclear chlorination of toluene, in the presence of a Lewis acid catalyst, and a co-catalyst comprising at least one compound selected from the group consisting of phenoxthine derivatives and highly chlorinated phenoxthine derivatives obtained by chlorinating said phenoxthine derivatives at higher degree, said phenoxthine derivatives being represented by the general formula of: ##STR1## wherein R represents methyl group or groups at the position-1 and/or position-3,m is zero or an integer of 1 or 2,X is hydrogen or chlorine atom, andY is chlorine atom or methyl group;and whereinm is an integer of 1 or 2 andX is hydrogen or chlorine atom when Y is chlorine atom,X is chlorine atom when Y is methyl group and m is zero, andX is hydrogen atom when Y is methyl group and m is an integer of 1 or 2.