Process for purification of ortho-chlorotoluene

Details Process for purification of ortho-chlorotoluene Process for purification of ortho-chlorotoluene

1988-12-28

1992-09-01

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

585828, C07C 1738, C07C 713

Patent

active

051436850

ABSTRACT:
A process for separating the ortho-isomer of chlorotoluene from a feed mixture containing ortho- and para-chlorotoluene by selective adsorption and desorption with an L zeolite adsorbent having potassium or potassium and sodium cations at cation exchange sites and a desorbent containing chlorobenzene or mixtures thereof with a saturated aliphatic hydrocarbon and especially 10-50% chlorobenzene and 50-90% saturated aliphatic hydrocarbon. The ortho-chlorotoluene is relatively non-absorbed on the adsorbent and is recovered prior to more strongly adsorbed species in a rejective separation process.

REFERENCES:
patent: 3216789 (1965-11-01), Breck et al.
Chen et al., Chemical Engineering Progress, Feb. 1988, pp. 32-40.

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