PRETREATMENT METHOD FOR CHELATE RESIN HAVING PYRIDINE RING USED FOR COLLECTING CATALYST IN TEREPHTHALIC ACID PRODUCTION PROCESS

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 (Inc. Mizushima Plant, 10, Mizushimakaigandori 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)

Application Number:

JP2011/053547

Publication Date:

August 25, 2011

Filing Date:

February 18, 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)

International Classes:

B01J38/00; B01J23/90; B01J45/00; B01J49/00; C07C51/42; 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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