Purification of propylene oxide by liquid extraction

C - Chemistry – Metallurgy – 07 – D

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C07D 301/19 (2006.01) B01D 3/40 (2006.01) C07C 29/48 (2006.01) C07C 29/84 (2006.01) C07C 31/12 (2006.01) C07D 301/32 (2006.01) C07D 303/04 (2006.01)

Patent

CA 2068277

PURIFICATION OF PROPYLENE OXIDE BY LIQUID EXTRACTION (Docket No. 80,919-F) ABSTRACT OF THE DISCLOSURE Purified propylene oxide is recovered from an impure propylene oxide feedstock contaminated with more than 50 ppm of six carbon atom hydrocarbon impurities by a solvent extraction process wherein: an impure propylene oxide feedstock is charged to a liquid/liquid extraction zone and contacted therein with an extractant consisting essentially of water and a paraf- finic hydrocarbon containing 8 to 10 carbon atoms, and resolved therein into a raffinate consisting essentially of an aqueous solution of propylene oxide and into an extract comprising the paraffinic hydrocarbon and the 6 carbon atom impurities initially present in the propylene oxide feedstock.

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