Distillation mehtod and column

Application Number: 00108876
Application Date: 2000.05.19
Publication Number: 1274613
Publication Date: 2000.11.29
Priority Information: 1999/5/21 US 09/316,820
International: B01D3/26
Applicant(s) Name: BOC Co., Ltd.
Inventor(s) Name: M. H. Dian;R. W. Porthoffer;R. M. Thorowgood
Patent Agency Code: 31100
Patent Agent: zhou chengze
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.