Plural stage drying and purification of propylene oxide

Details Plural stage drying and purification of propylene oxide Plural stage drying and purification of propylene oxide

1993-09-23

1994-10-11

Bascomb, Jr, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 70, 203 74, 203 75, 203 81, 203 82, 549541, B01D 340, C07D30132

Patent

active

053544315

ABSTRACT:
Crude propylene oxide is purified by a distillation process wherein it is (a) extractively distilled in a first column using a C.sub.2 to C.sub.6 alkylene glycol extractive distillation agent to form a first overhead fraction comprising propylene oxide, C.sub.5 -C.sub.7 hydrocarbons, methanol, water and oxygen-containing impurities, (b) wherein the first overhead fraction is separated in a plurality of intermediate distillation columns to provide an intermediate propylene oxide overhead fraction consisting essentially of propylene oxide and water, and (c) the intermediate propylene oxide overhead fraction is charged to a final distillation column using a C.sub.2 to C.sub.6 alkylene glycol extractive distillation agent to form a final 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: 3843488 (1974-10-01), Schmidt 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: 5262017 (1993-11-01), Meyer et al.

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