Title:
セラミックフィルターを用いるクロスフロー方式による濾過運転方法
Document Type and Number:
Japanese Patent JP5853955
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.
Inventors:
Fumiya Aima
Application Number:
JP2012540885A
Publication Date:
February 09, 2016
Filing Date:
October 25, 2011
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
International Classes:
B01D29/25; C07C51/43; B01D29/37; B01D35/22; B01D37/04; B01D61/14; B01D61/22; B01D65/02; B01D65/06; B01D71/02; C07C63/24
Domestic Patent References:
| JPH0568869A | 1993-03-23 | |||
| JP2003507160A | 2003-02-25 | |||
| JPS6351913A | 1988-03-05 | |||
| JPH03131312A | 1991-06-04 | |||
| JPH09239246A | 1997-09-16 | |||
| JP2000140842A | 2000-05-23 | |||
| JP2002263412A | 2002-09-17 | |||
| JPH0568869A | 1993-03-23 |
Other References:
JPN3003001159; 名出康雄: 'セラミック膜による超微粒子の分離' 化学装置 Ｖ３２ Ｎ１１, 19901101, Ｐ７７-８７
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