C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 5/02 (2006.01)
Patent
CA 2327402
One aspect of the invention is a process for purifying a pentafluorophenyl boron compound from a crude mixture comprised of the pentafluorophenyl boron compound and impurities, the impurirtes at least comprised of an ether and water, the process comprising: (a) mixing the crude mixture with an azeotropic organic solvent which (i) is capable of azeotrope formation with the water and (ii) has a boiling point above the boiling point of the ether; (b) distilling the resulting solution to remove at least a portion of the impurities; and (c) cooling the distilled solution so that a precipitate comprised of the pentafluorophenyl boron compound is formed. Processes are also described for producing pentafluorophenyl boron compounds which are particularly pure, dry and fine.
Selon un aspect, l'invention concerne un procédé de purification de composé à base de pentafluorophényl bore à partir d'un mélange brut de ce composé et d'impuretés, lesquelles renferment au moins un éther et de l'eau. Le procédé comprend les étapes suivantes : (a) brassage entre le mélange brut et un solvant organique azéotropique, (i) capable de formation azéotrope avec l'eau, (ii) dont le point d'ébullition est supérieur à celui de l'éther; (b) distillation de la solution résultante pour éliminer au moins une partie des impuretés; et (c) refroidissement de la solution distillée pour obtenir un précipité renfermant le composé considéré. L'invention concerne également un certain nombre de procédés relatifs à la fabrication des composés en question, sous une forme particulièrement pure, sèche et fine.
Diefenbach Steven P.
Lee John Y.
Lin Ronny W.
Power John M.
Albemarle Corporation
Macrae & Co.
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