Title:
METHOD FOR PRODUCING TEREPHTHALIC ACID OR SALT THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/149567
Kind Code:
A1
Abstract:
An aqueous solution comprising terephthalic acid or a salt thereof and a diol is filtered across a polyamide nanofiltration membrane, and terephthalic acid or a salt thereof can be selectively separated and recovered from the non-permeated solution side and the diol can be selectively separated and recovered from the permeated solution side. The selectively separated and recovered terephthalic acid or salt thereof or diol can each be independently reutilized as a polymer starting material, e.g., for a polyester.
Inventors:
KASAHARA TAKUYA (JP)
TSURUYA ATSUKI (JP)
KURIHARA HIROYUKI (JP)
TSURUYA ATSUKI (JP)
KURIHARA HIROYUKI (JP)
Application Number:
PCT/JP2023/003694
Publication Date:
August 10, 2023
Filing Date:
February 06, 2023
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C07C51/42; B01D61/02; B01D71/56; C07C51/43; C07C63/26; C07C63/28; C12N15/55; C12P7/44
Foreign References:
| CN104829030A | 2015-08-12 | |||
| GB2525989A | 2015-11-11 |
Other References:
ZHOU HUITING, DU CHUNHUI, WU CHUNJIN, WU LIGUANG: " Treatment and reuse of alkali reduction wastewater with integrated membrane technique", KE JI DAO BAO : YUE KAN = SCIENCE & [AND] TECHNOLOGY REVIEW, ZHONG GUO KE JI DAO BAO SHE, CN, vol. 33, no. 14, 14 December 2015 (2015-12-14), CN , pages 70 - 73, XP093083776, ISSN: 1000-7857, DOI: 10.3981/j.issn.1000-7857.2015.14.012
CHOE, E.K. ; SON, E.J. ; LEE, B.S. ; JEONG, S.H. ; SHIN, H.C. ; CHOI, J.S.: "NF process for the recovery of caustic soda and concentration of disodium terephthalate from alkaline wastewater from polyester fabrics", DESALINATION., ELSEVIER, AMSTERDAM., NL, vol. 186, no. 1-3, 30 December 2005 (2005-12-30), NL , pages 29 - 37, XP027691944, ISSN: 0011-9164
CHOE, E.K. ; SON, E.J. ; LEE, B.S. ; JEONG, S.H. ; SHIN, H.C. ; CHOI, J.S.: "NF process for the recovery of caustic soda and concentration of disodium terephthalate from alkaline wastewater from polyester fabrics", DESALINATION., ELSEVIER, AMSTERDAM., NL, vol. 186, no. 1-3, 30 December 2005 (2005-12-30), NL , pages 29 - 37, XP027691944, ISSN: 0011-9164
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