Title:
METHOD OF PRODUCTION OF PRODUCT ACETONE OF HIGH STABILITY TO OXIDATION
Document Type and Number:
WIPO Patent Application WO2001062695
Kind Code:
A8
Abstract:
Disclosed is a method for the production of product acetone of higher oxidation stability where the product acetone is produced by a multi-step rectification process in the presence of alkali catalyst. The embodiments of the method of present invention utilize a two-column and a one-column scheme of product acetone rectification from an acetone stream. In a two-column embodiment of the present invention, acetone is taken off in a vapor phase as a side-draw in a first column and directed to a partial condenser wherein it is separated into liquid and vapor phases with a simultaneous feed of aqueous sodium hydroxide solution to the first column above the feed tray. The vapor phase of the partial condenser is forwarded to a second column where the product acetone is rectified and then removed overhead, the bottom products are recycled to the first column feed, and the liquid phase of the partial condenser is treated with alkali and recycled either to the first column or to a neutralization stage of cumene hydroperoxide cleavage products. In a one-column embodiment of the present invention, acetone is taken off in the vapor phase overhead and directed to the partial condenser with the simultaneous feed of the aqueous sodium hydroxide solution above the feed tray. Product acetone is then condensed from the vapor phase and removed.
Inventors:
ZAKOSHANSKY VLADIMIR
VASSILIEVA IRINA IVANOVNA
VASSILIEVA IRINA IVANOVNA
Application Number:
PCT/US2001/004435
Publication Date:
January 03, 2002
Filing Date:
February 09, 2001
Export Citation:
Assignee:
ILLA INTERNAT L L C (US)
International Classes:
C07C45/53; C07C45/82; (IPC1-7): C07C37/08; C07C45/80; C07C49/08
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