Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2003-10-31
2008-05-06
Drodge, Joseph (Department: 1797)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
C134S001000, C210S634000, C264S001100, C523S106000
Reexamination Certificate
active
07368589
ABSTRACT:
The present invention relates to a process for the purification of silicone containing compounds via supercritical fluid extraction. Specifically, the present invention relates to a process comprising the steps of contacting at least one silicone containing compound with a supercritical fluid having a density of between about 0.2 and about 0.8 g/ml, decreasing said density so that two phases are formed a first phase comprising said at least one silicone containing compound and a second phase comprising at least one impurity and separating said second phase from said first phase.
REFERENCES:
patent: 2188013 (1940-01-01), Stanislaw et al.
patent: 4153641 (1979-05-01), Deichert et al.
patent: 4740533 (1988-04-01), Su et al.
patent: 4810756 (1989-03-01), Spinelli
patent: 4880543 (1989-11-01), Khosah et al.
patent: 5019628 (1991-05-01), Spinelli
patent: 5034461 (1991-07-01), Lai et al.
patent: 5070215 (1991-12-01), Bambury et al.
patent: 5371147 (1994-12-01), Spinelli et al.
patent: 5607518 (1997-03-01), Hoffman et al.
patent: 5760100 (1998-06-01), Nicolson et al.
patent: 6071439 (2000-06-01), Bawa et al.
patent: 6200393 (2001-03-01), Romack et al.
patent: 6367929 (2002-04-01), Maiden et al.
patent: 2004/0176628 (2004-09-01), Kunzler et al.
patent: 0 484 959 (1992-05-01), None
patent: WO 03/080713 (2003-10-01), None
PCT International Search Report, dated Feb. 4, 2006, for PCT Int'l. Appln. No. PCT/US2004/035883.
Chlorine Engineering Corp., Ltd., “Purification to Modified Silicone Oil”, Patent Abstracts of Japan, vol. 18, No. 385, Jul. 10, 1994.
Kim, Sunwook et al., “Phase behaviors and fractionation of polymer solutions in supercritical carbon dioxide”, Journal of Supercritical Fluids, vol. 13. No. 1-3. Jun. 15, 1998, pp. 99-106.
Mahadevan Shivkumar
Molock Frank
Serpilio, Jr. James M.
Tian Yuan
Wang Shanger
Drodge Joseph
Johnson & Johnson Vision Care Inc.
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