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Title:
CROSSFLOW TYPE FILTERING OPERATION METHOD USING CERAMIC FILTER
Document Type and Number:
WIPO Patent Application WO/2012/057155
Kind Code:
A1
Abstract:
Provided is a simple filtering operation method capable of carrying out a filtering operation with a ceramic filter over extended periods of time without clogging, in the operation of crossflow type filtering, using a ceramic filter, of terephthalic acid fine crystals in an oxidation reaction mother liquor during a process of terephthalic acid production. The present invention makes this possible by a fine crystal filtering operation and a backwash operation by a filtrate while maintaining a distribution circulation operation of the oxidation reaction mother liquor, under certain conditions.

Inventors:
ZAIMA, Fumiya (Inc. Mizushima Plant, 10, Mizushima-kaigandori 3-chome, Kurashiki-sh, Okayama 25, 〒7128525, JP)
在間 文哉 (〒25 岡山県倉敷市水島海岸通3丁目10番地 三菱瓦斯化学株式会社 水島工場内 Okayama, 〒7128525, JP)
HOSHISHIMA, Nirou (3-1, Mizushima Nakadori 2-chome, Kurashiki-sh, Okayama 72, 〒7128072, JP)
星島 二郎 (〒72 岡山県倉敷市水島中通2丁目3番地1号 水島アロマ株式会社内 Okayama, 〒7128072, JP)
Application Number:
JP2011/074572
Publication Date:
May 03, 2012
Filing Date:
October 25, 2011
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC. (5-2 Marunouchi 2-chome, Chiyoda-ku Tokyo, 24, 〒1008324, JP)
三菱瓦斯化学株式会社 (〒24 東京都千代田区丸の内二丁目5番2号 Tokyo, 〒1008324, JP)
TOYOBO CO.,LTD. (2-8 Dojima Hama 2-chome, Kita-ku Osaka-sh, Osaka 30, 〒5308230, JP)
東洋紡績株式会社 (〒30 大阪府大阪市北区堂島浜二丁目2番8号 Osaka, 〒5308230, JP)
MIZUSHIMA AROMA COMPANY, LTD. (3-1 Mizushima Nakadori 2-chome, Kurashiki-shi Okayama, 72, 〒7128072, JP)
水島アロマ株式会社 (〒72 岡山県倉敷市水島中通2丁目3番地1号 Okayama, 〒7128072, JP)
ZAIMA, Fumiya (Inc. Mizushima Plant, 10, Mizushima-kaigandori 3-chome, Kurashiki-sh, Okayama 25, 〒7128525, JP)
International Classes:
C07C51/43; B01D29/25; B01D29/37; B01D35/22; B01D37/04; B01D61/14; B01D61/22; B01D65/02; B01D65/06; B01D71/02; C07C63/26
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (OHTANI PATENT OFFICE, Bridgestone Toranomon Bldg. 6F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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Claims: