Title:
PRETREATMENT METHOD FOR CHELATE RESIN HAVING PYRIDINE RING USED FOR COLLECTING CATALYST IN AROMATIC CARBOXYLIC ACID PRODUCTION PROCESS
Document Type and Number:
WIPO Patent Application WO/2011/102479
Kind Code:
A1
Abstract:
In a process for producing an aromatic carboxylic acid, when a chelate resin having a pyridine ring, which is used in the step for absorbing and collecting a bromide ion and a heavy metal ion derived from a catalyst by means of an oxidation reaction mother liquor, is being subjected to pretreatment, said resin would swell, produce heat, or generate air bubbles, causing the resin to fracture or deteriorate. Under predetermined conditions, a chelate resin having a pyridine ring is brominated using an aqueous hydrobromic acid solution, as the first treatment, and is displaced in an acetic acid solvent in the subsequent second treatment, thereby being able to prevent said resin from fracturing and deteriorating.
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Inventors:
ZAIMA FUMIYA (JP)
FUJITA HIDEAKI (JP)
FUJITA HIDEAKI (JP)
Application Number:
PCT/JP2011/053546
Publication Date:
August 25, 2011
Filing Date:
February 18, 2011
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
ZAIMA FUMIYA (JP)
FUJITA HIDEAKI (JP)
ZAIMA FUMIYA (JP)
FUJITA HIDEAKI (JP)
International Classes:
B01J38/00; B01J23/90; B01J45/00; B01J49/00; C07C51/265; C07C63/16; C07C63/38
Domestic Patent References:
| WO2009022237A2 | 2009-02-19 | |||
| WO2008075572A1 | 2008-06-26 | |||
| WO2008075572A1 | 2008-06-26 |
Foreign References:
| JP2002012573A | 2002-01-15 | |||
| JPH06315637A | 1994-11-15 | |||
| JPS5310680A | 1978-01-31 | |||
| JP2003527950A | 2003-09-24 | |||
| JPS53102290A | 1978-09-06 | |||
| JPH05306253A | 1993-11-19 | |||
| JPH06506211A | 1994-07-14 | |||
| JP2002233763A | 2002-08-20 |
Other References:
See also references of EP 2537584A4
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)
Tamotsu Otani (JP)
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Claims: