Purification of difluoromethane

Details Purification of difluoromethane Purification of difluoromethane

2007-03-13

2007-03-13

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

With measuring, testing or inspecting

Of concentration

C203S067000, C203S094000, C203S098000, C203S099000, C203SDIG019, C570S178000

Reexamination Certificate

active

09816529

ABSTRACT:
A method for separating difluoromethane from a mixture of difluoromethane and at least one impurity, the method involving extractively distilling the mixture using dichloromethane as an extractive agent to recover a product stream of purified difluoromethane having a concentration of impurity lower than that of the mixture.

REFERENCES:
patent: 3101304 (1963-08-01), Wiist
patent: 3819493 (1974-06-01), Fozzard
patent: 4358348 (1982-11-01), Sulzbach
patent: 5087329 (1992-02-01), Felix
patent: 5200431 (1993-04-01), Dattani et al.
patent: 5421964 (1995-06-01), Mahler et al.
patent: 5470442 (1995-11-01), Mahler et al.
patent: 5534151 (1996-07-01), Lee
patent: 5707497 (1998-01-01), Galland et al.
patent: 5763708 (1998-06-01), Clemmer et al.
patent: 5785822 (1998-07-01), Cerri et al.
patent: 5800682 (1998-09-01), Cerri et al.
patent: 6156161 (2000-12-01), Miller
patent: 6297412 (2001-10-01), Yokoyama et al.
patent: 6346172 (2002-02-01), Tsuda et al.
patent: 6365580 (2002-04-01), Clemmer et al.
patent: 6723887 (2004-04-01), Ramanathan et al.
patent: 7291878 (1995-07-01), None
patent: WO 97/03936 (1997-02-01), None
patent: 99/07660 (1999-02-01), None
patent: 99/25670 (1999-05-01), None
Coulson et al “Chemical Engineering” vol. 2, third ed.p. 478.

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