Method for purifying tetrahydrofuran by distillation

Details Method for purifying tetrahydrofuran by distillation Method for purifying tetrahydrofuran by distillation

2008-04-01

2008-04-01

Manoharan, Virginia (Department: 1797)

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

C203S014000, C203S078000, C203S099000, C203SDIG019, C549S429000, C549S509000

Reexamination Certificate

active

07351311

ABSTRACT:
Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

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Translation of JP 2639463.
Translation of JP 2639464.
Translation of JP 2639463, Published: Aug. 13, 1997.
Translation of JP 2639464, Published: Aug. 13, 1997.

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