Distillation: processes – separatory – Adding material to distilland except water or steam per se
Patent
1997-08-08
2000-02-15
Manoharan, Virginia
Distillation: processes, separatory
Adding material to distilland except water or steam per se
203 64, 203 68, 203 74, 203 77, 203 80, 549531, 549538, B01D 340, C07C30112, C07C30132
Patent
active
060248408
ABSTRACT:
Propylene oxide obtained by an epoxidation process which uses methanol as a solvent may be effectively treated to remove acetaldehyde by subjecting the crude epoxidation reaction product to fractional distillation. The methanol solvent is utilized during such distillation to lower the relative volatility of the acetaldehyde impurity, thereby making it possible to obtain a bottoms fraction containing substantially all the acetaldehyde. Purified propylene oxide having a reduced acetaldehyde concentration is removed as an overhead stream. Water may also be effectively separated from the propylene oxide using this procedure.
REFERENCES:
patent: 3881996 (1975-05-01), Schmidt
patent: 4140588 (1979-02-01), Schmidt
patent: 4349416 (1982-09-01), Brandt et al.
patent: 4584063 (1986-04-01), Berg et al.
patent: 4597834 (1986-07-01), Berg et al.
patent: 4620901 (1986-11-01), Berg et al.
patent: 4824976 (1989-04-01), Clerici et al.
patent: 4833260 (1989-05-01), Neri et al.
patent: 4971661 (1990-11-01), Meyer et al.
patent: 5000825 (1991-03-01), Shih et al.
patent: 5133839 (1992-07-01), Shih
patent: 5139622 (1992-08-01), Marquis et al.
patent: 5274138 (1993-12-01), Keating et al.
patent: 5453160 (1995-09-01), Peters et al.
patent: 5523426 (1996-06-01), Jubin, Jr. et al.
patent: 5591875 (1997-01-01), Chang et al.
patent: 5621122 (1997-04-01), Saxton et al.
patent: 5646314 (1997-07-01), Crocco et al.
Arco Chemical Technology L.P.
Harper Stephen D.
Manoharan Virginia
LandOfFree
Propylene oxide purification does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Propylene oxide purification, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propylene oxide purification will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902769