Distillation: processes – separatory – Addition of material to distilland to inhibit or prevent...
Patent
1993-04-15
1994-06-28
Medley, Margaret
Distillation: processes, separatory
Addition of material to distilland to inhibit or prevent...
203 7, 564306, 570178, 570262, C23F 1100, C23F 1400, C07C 1700
Patent
active
053243935
ABSTRACT:
A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such unit with a fouling preventing amount of a composition comprising (a) 2-15 weight % of an oil soluble polyacrylate ester or methacrylate ester with alcohol radical of the ester group containing from C.sub.4 -C.sub.22 carbon atoms which contains between 0.1-25 mole % of amino alcohol ester groups; (b) 20-40 weight % a phenylene diamine compound having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different and are hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 aryl, C.sub.1 -C.sub.20 alkaryl or C.sub.1 -C.sub.20 aralkyl, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is hydrogen; and (c) the balance is a heavy aromatic solvent.
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patent: 5110997 (1992-05-01), Dickakian
Barrett Joseph B.
Drake James J.
Medley Margaret
Miller Robert A.
Nalco Chemical Company
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