Distillation method and column

Details Distillation method and column Distillation method and column

1999-05-21

2000-10-10

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62906, F25J 100

Patent

active

061289221

ABSTRACT:
A distillation method and column in which a gaseous mixture is introduced into a bottom region of a packed column having a plurality packed beds using structured packing. The gaseous mixture comprises higher and lower volatility components. The packed column is operated so that the higher and lower volatility components have a relative volatility within the column in a range of between 1.05 and 1.8. In order to alleviate the effect of liquid maldistribution in the lowermost bed of such a column, the lowermost bed is sized to be between about 50% and about 80% of the height of the next overlying bed, with 80% being preferred and the total height of the packing within the column is at least about six meters.

REFERENCES:
patent: 4813988 (1989-03-01), Bennett et al.
patent: 4836836 (1989-06-01), Bennett et al.
patent: 5237823 (1993-08-01), Cheung et al.
patent: 5613374 (1997-03-01), Rohde et al.

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