Title:
A filtration operating method by the crossing flow method using a ceramics filter
Document Type and Number:
Japanese Patent JP5915534
Kind Code:
B2
Abstract:
Provided is a simple filtering operation method capable of conducting a filtering operation without clogging in a ceramic filter for a long period of time, in the operation of filtering fine crystals of terephthalic acid in an oxidation reaction mother liquor obtained in a process of terephthalic acid production by a cross-flow filtration using the ceramic filter. The present invention can be accomplished by conducting an operation for filtering the fine crystals and a back washing operation with a filtrate while maintaining a flowing circulation operation of the oxidation reaction mother liquor under predetermined conditions.
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Inventors:
Fumiya Aima
Jiro Hoshijima
Uozumi Kazutori
Hideaki Fujita
Jiro Hoshijima
Uozumi Kazutori
Hideaki Fujita
Application Number:
JP2012540884A
Publication Date:
May 11, 2016
Filing Date:
October 25, 2011
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
International Classes:
B01D65/02; C07C51/43; B01D65/06; B01D71/02; C07C63/26
Domestic Patent References:
| JP2009091359A | 2009-04-30 | |||
| JP2006265124A | 2006-10-05 | |||
| JP2002524390A | 2002-08-06 | |||
| JP2003507160A | 2003-02-25 | |||
| JPS6351913A | 1988-03-05 | |||
| JPH03131312A | 1991-06-04 | |||
| JPH09239246A | 1997-09-16 | |||
| JP2000140842A | 2000-05-23 | |||
| JP2002263412A | 2002-09-17 | |||
| JP2009091359A | 2009-04-30 | |||
| JP2006265124A | 2006-10-05 | |||
| JP2002524390A | 2002-08-06 |
Foreign References:
| WO2007135738A1 | 2007-11-29 | |||
| WO2007135738A1 | 2007-11-29 |
Attorney, Agent or Firm:
Tamotsu Otani
Wataru Sasaki
Shigeru Torayama
Wataru Sasaki
Shigeru Torayama