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公开(公告)号：EP4458801A1
公开(公告)日：2024-11-06
申请号：EP23784896.5
申请日：2023-03-23
发明人： YOO, Young-Man , HWANG, Eun-Yeong
IPC分类号： C07C67/02 , C07C69/675 , C08G63/06
摘要： Through a transesterification reaction in which a predetermined amount of bis(2-hydroxyethyl)terephthalate relative to glycol is fed in a divided or continuous manner, bis(glycol)terephthalate with a low residual amount of an ethylene glycol derivative is prepared, and polyester engineering products or biodegradable polyester products with high crystallinity can be produced therefrom.
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公开(公告)号：EP4458799A1
公开(公告)日：2024-11-06
申请号：EP23863403.4
申请日：2023-08-30
发明人： CHANG, Yu-Mi , KANG, Ju-Sik , PARK, Jeong Ho , CHAE, Hee-Il
IPC分类号： C07C51/09 , C07C63/26 , C07C67/03 , C07C67/56 , C07C69/82 , C08J11/10 , C08G63/183 , C07C67/60
摘要： The present invention pertains to a method for producing terephthalic acid in an eco-friendly manner using waste polyester. Specifically, according to an embodiment of the present invention, the method for producing terephthalic acid comprises the steps of: (1) subjecting waste polyester to alcoholysis using a C4 or higher alcohol to produce a liquid composition containing a compound represented by formula 1; and (2) subjecting the liquid composition to hydrolysis, and thus can produce terephthalic acid in an eco-friendly manner, as well as improve processability and reduce process costs.
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3.发明公开
公开(公告)号：EP4452491A1
公开(公告)日：2024-10-30
申请号：EP22835618.4
申请日：2022-12-09
发明人： BOBKA, Roman , MESTL, Gerhard , SCHECK, Peter
IPC分类号： B01J35/00 , B01J23/44 , B01J23/52 , C07C67/055 , B01J23/755 , B01J35/10
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公开(公告)号：EP3347445B1
公开(公告)日：2024-10-30
申请号：EP15774870.8
申请日：2015-09-08
IPC分类号： C11B9/00 , C07C67/08 , C07C67/14 , C07C69/013
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公开(公告)号：EP4279477B1
公开(公告)日：2024-10-23
申请号：EP21923690.8
申请日：2021-02-03
发明人： NI, Youming , ZHU, Wenliang , LIU, Zhongmin
IPC分类号： C07C51/09 , C07C67/08 , C07C59/06 , C07C69/145 , C07C69/675 , C07C51/377 , C07C67/31
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公开(公告)号：EP4444691A1
公开(公告)日：2024-10-16
申请号：EP21823929.1
申请日：2021-12-10
发明人： MARTI, Roger , DARDANO, Florian , ALBERGATI, Luce , SILVESTRE, Ricardo , ZINN, Manfred , AMSTUTZ, Véronique , HANIK, Nils
IPC分类号： C07C67/03 , C09J167/04 , C10L10/18 , C08G63/00
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公开(公告)号：EP4444482A1
公开(公告)日：2024-10-16
申请号：EP22854475.5
申请日：2022-12-02
申请人： ECOLAB USA INC.
发明人： KONG, Meng
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公开(公告)号：EP3865495B1
公开(公告)日：2024-10-09
申请号：EP21168132.5
申请日：2017-11-09
IPC分类号： C07F15/00 , B01J31/22 , C07C67/475
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公开(公告)号：EP4438587A1
公开(公告)日：2024-10-02
申请号：EP22906497.7
申请日：2022-12-12
发明人： NI, Youming , ZHU, Wenliang , LIU, Zhongmin
IPC分类号： C07C67/08 , C07C67/24 , C07C67/31 , C07C69/675 , C07C67/37 , C07C69/708 , B01J29/70 , B01J29/08 , B01J29/40 , B01J29/65
摘要： A method for preparing a methyl ester compound, which comprises: subjecting a raw material of a carboxyl compound, methanol and/or dimethyl ether to an esterification reaction to obtain the methyl ester compound, where the general formula I of the carboxyl compound is R-CH2-COOH, where R is a methoxy or hydroxyl; and the methyl ester compound comprises at least one of methyl methoxyacetate and methyl glycolate. This application also discloses a method for preparing a methyl glycolate, comprising the steps of: a) subjecting methylal and carbon monoxide to a carbonylation reaction to obtain methyl methoxyacetate; b) subjecting the methyl methoxyacetate and water to a hydrolysis reaction to obtain the methyl glycolate; and c) subjecting glycolic acid, methoxyacetic acid, methanol, and dimethyl ether to an esterification reaction to obtain the methyl glycolate. The method can greatly simplify the separation process, save the energy consumption, and provides a new synthesis route for synthesizing a methyl ester compound, especially methyl glycolate.
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公开(公告)号：EP3854776B1
公开(公告)日：2024-09-18
申请号：EP20785133.8
申请日：2020-03-30
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