Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Patent
1993-10-26
1994-10-11
Bascomb, Jr., Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
Organic compound
203 70, 203 73, 203 78, 203 80, 549541, B01D 340, C07D30132
Patent
active
053544307
ABSTRACT:
Contaminants are removed from impure propylene oxide by fractionating in a first column to remove overhead essentially all of the pentenes and pentanes and most of the oxygen-containing impurities to provide a partially purified first propylene oxide bottoms fraction, extractively distilling the first bottoms fraction in a second extractive column using a C.sub.2 to C.sub.6 alkylene glycol extractive distillation agent to form a second overhead fraction comprising propylene oxide, hexenes, hexanes, water, residual quantities of pentenes and pentanes and oxygen-containing impurities, extractively distilling the second overhead fraction in a third column using a C.sub.6 to C.sub.10 alkane hydrocarbon extractive distillation agent to form a third bottoms fraction comprising the extractive distillation agent, propylene oxide, hexenes, hexanes, residual quantities of pentenes and pentanes and water, and extractively distilling said third bottoms fraction in a fourth column using a C.sub.6 to C.sub.10 alkane hydrocarbon extractive distillation agent to form a fourth overhead fraction consisting essentially of propylene oxide.
REFERENCES:
patent: 3338800 (1967-08-01), Binning et al.
patent: 3464897 (1969-09-01), Jubin
patent: 3578568 (1971-05-01), Washall
patent: 3607669 (1971-09-01), Jubin
patent: 3838020 (1974-09-01), Kageyama et al.
patent: 3881996 (1975-05-01), Schmidt
patent: 5000825 (1991-03-01), Shih et al.
patent: 5129996 (1992-07-01), Shih
patent: 5133839 (1992-07-01), Shih
patent: 5139622 (1992-08-01), Marquis et al.
patent: 5262017 (1993-11-01), Meyer et al.
Culbreth, III William K.
Pottratz David G.
Sheu Yu-Hwa E.
Bailey James L.
Bascomb, Jr. Wilbur
Priem Kenneth R.
Ries Carl G.
Texaco Chemical Company
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