Process for recovering propylene oxide

Details Process for recovering propylene oxide Process for recovering propylene oxide

1995-03-23

1997-12-02

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 54, 203 55, 203 56, 203 58, 203 60, 203 62, 203 63, 203 64, 549541, B01D 334, C07D30132

Patent

active

056931930

ABSTRACT:
Propylene oxide is recovered through the use of an additive in a distillation solution, resulting in suppressed side reactions and reduced loss of product. Propylene oxide is produced by oxidizing ethylbenzene in a liquid phase with molecular oxygen to a obtain a reaction liquid containing ethylbenzene hydroperoxide; distilling the reaction liquid to obtain a concentrated solution of ethylbenzene hydroperoxide; further mixing and reacting the concentrated solution with propylene to obtain a mixed solution containing propylene oxide; and distilling the mixed solution to separate and recover propylene oxide. At least one compound selected from aliphatic saturated alcohols having 2 to 4 carbon atoms, allyl alcohol, saturated aliphatic hydrocarbons having 6 or 7 carbon atoms, benzene, ethers, ketones, nitriles, amines, pyridines, diamines, and aminoalcohols is added to the mixed distillation solution in an amount of 0.01-100 parts by weight per 100 parts by weight of propylene oxide.

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