ALKYLENE OXIDE RECOVERY SYSTEMS

WIPO Patent Application WO/2010/014187

A3

The application relates to a process for recovery of alkylene oxide comprising: Introducing a feed stream containing alkylene oxide to a stripping section of an alkylene oxide recovery column; stripping alkylene oxide from the feed stream to form a first gaseous portion, wherein the first gaseous portion flows from the stripping section to the reabsorption région of the alkylene oxide recovery column, and wherein the reabsorption région further comprises a first reabsorption section and a second reabsorption section; partially condensing the first gaseous portion into a liquid reflux stream and an alkylene oxide rich vapor stream, wherein the liquid reflux stream is in physical communication with the stripping section; reabsorbing a first fraction of the alkylene oxide rich vapor stream in a first water stream and reabsorbing a second fraction of the alkylene oxide rich vapor stream in a second water stream to form a second agueous solution in the second reabsorption section.

SZUL JOHN F (US)
MCCAIN JAMES H (US)
PFEFFER FLOYD L (US)
ANDRESEN HARVEY E (US)
FAIRCHILD PHILLIP R (US)
NEWMAN KENT E (US)

PCT/US2009/004318

March 25, 2010

July 24, 2009

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DOW TECHNOLOGY INVESTMENTS LLC (US)
SZUL JOHN F (US)
MCCAIN JAMES H (US)
PFEFFER FLOYD L (US)
ANDRESEN HARVEY E (US)
FAIRCHILD PHILLIP R (US)
NEWMAN KENT E (US)

B01D3/14; B01D5/00; C07D301/32

WO2009094103A1	2009-07-30
WO2009105252A1	2009-08-27

US4033617A	1977-07-05
DE10138150A1	2003-02-13
US3531376A	1970-09-29
DE19924533A1	2000-11-30

HUEBSCH, Joseph, C. et al. (Cameron & Huebsch PLLC,1221 Nicollet Avenue,Suite 50, Minneapolis MN, US)

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