Title:
【発明の名称】アジピン酸の製造において溶液中で触媒を抽出する方法
Document Type and Number:
Japanese Patent JP2002537279
Kind Code:
A
Abstract:
This invention relates to methods of extracting in solution a metal catalyst from a reaction mixture produced by oxidizing cyclohexane to adipic acid in the presence of acetic acid and the metal catalyst. According to this invention, substantially the totality of the cyclohexane is removed, as well as a major part of the adipic acid. A major part of the acetic acid is also removed without precipitating catalyst, thus forming a concentrate in solution. In a preferred embodiment of the instant invention, the concentrate enters a counter-current stream of counter flowing water and cyclohexanone, resulting in an aqueous solution of metal catalyst, which is the extract, and a phase of concentrate solution dissolved in cyclohexanone, which is the raffinate. The two solutions are further treated and/or recycled.
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Inventors:
Dod Jeon, Douglas Jay.
Deco Star, David Sea.
Dassell, Mark W.
Basilio, Austasia
Rostami, Adele M.
Deco Star, David Sea.
Dassell, Mark W.
Basilio, Austasia
Rostami, Adele M.
Application Number:
JP2000599722A
Publication Date:
November 05, 2002
Filing Date:
February 14, 2000
Export Citation:
Assignee:
RPC Inc.
International Classes:
C07C51/215; C07B61/00; C07C51/31; C07C51/48; C07C55/14; (IPC1-7): C07C51/215; C07C55/14
Attorney, Agent or Firm:
Shusaku Yamamoto