Method for producing propylene oxide

Details Method for producing propylene oxide Method for producing propylene oxide

2006-04-18

2006-04-18

Tsang, Cecilia J. (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S531000

Reexamination Certificate

active

07030254

ABSTRACT:
A process for producing purified propylene oxide comprising:first to sixth steps below, andusing heat of reaction generated in the first and/or second steps as a heat source for rectification in the fifth step and/or a heat source for rectification in the sixth step:first step: a step of obtaining cumene hydroperoxide trough oxidation of cumene,second step: a step of obtaining propylene oxide and cumyl alcohol by reacting cumene hydroperoxide with propylene in the presence of an epoxidation catalyst,third step: a step of separating into a fraction (2) containing crude propylene oxide and a fraction (3) containing crude propylene by subjecting an outlet liquid (1) of the second step to rectification,fourth step: a step of obtaining a fraction (4) containing crude propylene oxide and a fraction (6) containing cumyl alcohol by subjecting the fraction (2) to rectification,fifth step: a step of obtaining a fraction (7) containing purified propylene oxide by subjecting the fraction (4) to rectification, andsixth step: a step of obtaining a fraction (5) containing purified propylene by subjecting the fraction (3) to rectification.

REFERENCES:
patent: 3350422 (1967-10-01), Kollar
patent: 5849937 (1998-12-01), Jubin et al.
patent: 6303800 (2001-10-01), Dingerdissen et al.
patent: 6350888 (2002-02-01), Strebelle et al.
patent: 6646138 (2003-11-01), Oku et al.
patent: 63-17873 (1988-01-01), None
patent: WO01/05778 (2001-01-01), None

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