C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/20 (2006.01) C07F 7/08 (2006.01) C08G 77/04 (2006.01)
Patent
CA 2543259
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.
La présente invention se rapporte à un procédé de purification de composés contenant des silicones par extraction de fluide supercritique. Spécifiquement, la présente invention se rapporte à un procédé comprenant les étapes consistant à mettre en contact au moins un composé contenant des silicones avec un fluide supercritique ayant une densité comprise entre 0,2 environ et 0,8 environ g/ml; à réduire ladite densité de sorte que soient formées deux phases, à savoir une première phase comportant ledit ou lesdits composés contenant des silicones et une seconde phase comportant au moins une impureté, puis à séparer ladite seconde phase de ladite première phase.
Mahadevan Shivkumar
Molock Frank F.
Serpilio James M. Jr.
Tian Yuan
Wang Shanger
Johnson & Johnson Vision Care Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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