C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 55/14 (2006.01) C07C 51/48 (2006.01) C07C 63/15 (2006.01) C08G 63/16 (2006.01) C08G 63/78 (2006.01) C08G 69/28 (2006.01) C25B 3/02 (2006.01)
Patent
CA 2276899
23 This invention relates to methods of controlling the oxidation of hydrocarbons to respective dibasic acids, such as adipic acid for example, by removing the catalyst from the reaction mixture, outside the reaction zone, after the oxidation has taken place at least partially. The catalyst is precipitated substantially in its totality by using a base, preferably sodium hydroxide, to form the catalyst hydroxide, such as cobalt hydroxide for example. Preferably, the precipitated catalyst is recycled to the reaction zone with or without further treatment. The method may also include steps for treatment of the reaction mixture by hydrolysis and/or electrodialysis.
Dassel Mark W.
Vassiliou Eustathios
Gowling Lafleur Henderson Llp
Twenty-First Century Research Corporation
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