PROCESS FOR RECOVERY OF PARA-XYLENE FROM MIXTURES OF META- AND PARA-XYLENE

摘要

1285632 Crystallizing p.xylene CITIES SERVICE OIL CO 24 Nov 1969 [26 Nov 1968] 57285/69 Heading C5E p. Xylene is separated from a mixture consisting mainly of m- and p-xylenes by crystallization, a metal- or metalloid-containing organic eutectic inhibitor being dissolved in the mixture in amount 0À01-4 mole per cent before crystal separation. Eutectic inhibitors used in the examples are:-Ti(IV) bis[(di-2 ethylhexyl, orthophosphate]bis[(mono 2 ethylhexyl)orthophosphoric acid], Zn(II) 2 ethyl hexanoate, ferrocene and Zn(II) salicylaldehyde but many other suitable compounds of Al, Sb, As, B, Cr, Cu, Ge, Pb, Hg, Ni, Nb, Pd, Pt, Si, Te, Tl and Sn are listed.