Title:
PRETREATMENT METHOD FOR CHELATE RESIN HAVING PYRIDINE RING USED FOR COLLECTING CATALYST IN TEREPHTHALIC ACID PRODUCTION PROCESS
Document Type and Number:
WIPO Patent Application WO/2011/102480
Kind Code:
A1
Abstract:
In a process for producing a terephthalic 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/JP2011/053547
Publication Date:
August 25, 2011
Filing Date:
February 18, 2011
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
TOYO BOSEKI (JP)
MIZUSHIMA AROMA CO LTD (JP)
ZAIMA FUMIYA (JP)
FUJITA HIDEAKI (JP)
TOYO BOSEKI (JP)
MIZUSHIMA AROMA CO LTD (JP)
ZAIMA FUMIYA (JP)
FUJITA HIDEAKI (JP)
International Classes:
B01J38/00; B01J23/90; B01J45/00; B01J49/00; C07C51/42; C07C63/26
Domestic Patent References:
| WO2009022237A2 | 2009-02-19 | |||
| WO2008075572A1 | 2008-06-26 | |||
| WO2008072561A1 | 2008-06-19 |
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 2537585A4
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)
Tamotsu Otani (JP)
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Claims: