C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 307/33 (2006.01) B01D 3/36 (2006.01) C07D 315/00 (2006.01)
Patent
CA 2310707
Gamma-Butyrolactone (GBL) is recovered from a mixture containing GBL and other heavy organics by a process of azeotropic distillation in the presence of a C8-C10 hydrocarbon as an azeotroping agent, wherein an azeotrope of GBL and the hydrocarbon is obtained as a distillate, which forms immiscible GBL-rich and hydrocarbon-rich phases, and the hydrocarbon-rich phase is decanted or isolated from the GBL-rich phase. By this process GBL can be efficiently separated from a large proportion of various compounds having boiling points close to that of GBL, e.g., the methyl-.gamma.-butyrolactones (MeGBL's).
Garrett-Wallace Nicole
Gerberich H. Robert
Sitz Deborah A.
Warner R. Jay
Windhorst Kenneth A.
Celanese International Corporation Under The Laws Of The State O
Smart & Biggar
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