Methanol distillation process

Details Methanol distillation process Methanol distillation process

1978-02-14

1980-07-01

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 18, 203 25, 203 73, 203 81, 203DIG19, 203DIG23, B01D 314, C07C 2926

Patent

active

042104955

ABSTRACT:
Purified methanol is produced by distilling a water methanol mixture in (a) a first column from which is taken a product methanol stream at an upper level, weakly aqueous methanol as a side stream and water as bottoms and (b) a second column in which that weakly aqueous methanol is separated into an overhead product stream and aqueous methanol bottoms. The first column may be preceded by a preliminary volatiles-removal column. The process is economical in heat consumption, especially when methanol vapor from the second column is heat-exchanged with the feed or bottoms of the first column.

REFERENCES:
patent: 2115401 (1938-04-01), Shiffler
patent: 2152164 (1939-03-01), Wentworth
patent: 3230156 (1966-01-01), Katzen
patent: 3254024 (1966-05-01), Huckins et al.
patent: 3391064 (1968-07-01), Akell
patent: 3406100 (1968-10-01), Karafian
patent: 3568457 (1971-03-01), Briggs et al.
patent: 3597465 (1971-08-01), Karafian et al.
patent: 4013521 (1977-03-01), Scott

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