PURPOSE: To separate and recover the objective compound as a raffinate component, in high efficiency, in the adsorptive separation and recovery of the titled compound useful as an intermediate of novel agricultural chemical from the mixture of its isomers, by using a faujasite-type zeolite adsorbent.
CONSTITUTION: 3,5-Dichlorotoluene (3,5-DCT) is separated and recovered by adsorption process, from the mixture of DCT isomers containing 3,5-DCT and obtained by the isomerization of a mixture of DCT isomers under isomerization reaction condition. In the above process, the objective compound can be separated and recovered from the DCT isomer mixture containing 2,4-, 2,5- and/or 2,6- DCT having nearly equal boiling point to that of the objective compound by using a faujasite-type zeolite adsorbent of formula [M is cation, especially the I A, I B,IIA group of the periodic table, T1, proton or ammonium; n is atomic valence of M; x is 2.5±0.5 (X-type) or 3W6 (Y-type); y depends upon the degree of hydration].
NAGAOKA YUKIKO
TADA KUNIYUKI
Next Patent: 2,2,3-TRIMETHYLBICYCLO(2.2.1)HEPTANE-3,5-DIOL, ITS ESTER AND THEIR PREPARATION