Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1994-03-11
1995-11-28
Bascomb, Jr., Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
203 63, 203 66, 570178, B01D 340
Patent
active
054704421
ABSTRACT:
The disclosure relates to separating 1,1,2,2 tetrafluoroethane (HFC-134) and 1,1,1,2 tetrafluoroethane (HFC-134a) from each other and/or from fluorocarbon impurities by using extractive distillation with an extractive agent comprising an alcohol. Examples of suitable extractive agents comprise at least one member from the group of methanol, butanol, ethanol, propanol, their isomers and cyclic compounds thereof, among others.
REFERENCES:
patent: 3732150 (1973-05-01), Bailey
patent: 3819493 (1974-06-01), Fozzard
patent: 4906796 (1990-03-01), Yates
patent: 4996379 (1991-02-01), Oshio et al.
patent: 5200431 (1993-04-01), Dattani et al.
patent: 5243105 (1993-09-01), Scott et al.
patent: 5306850 (1994-04-01), Darago
patent: 5336377 (1994-08-01), Yates et al.
D. G. Gehring, Chlorofluorocarbons Alternatives Analysis, vol. 30, pp. 280-284.
Harold R. Null, Phase Equilibrium In Process Design, pp. 124-126.
Reid et al., The Properties of Gases And Liquids, pp. 241-387.
Activity And Activity Coefficients--pp. 165-244.
Mahler Barry A.
Miller Ralph N.
Bascomb, Jr. Wilbur
Boyer Michael K.
E. I. Du Pont de Nemours and Company
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