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公开(公告)号：EP4212507A1
公开(公告)日：2023-07-19
申请号：EP21866799.6
申请日：2021-09-08
发明人： MUKAE, Masashi , TAKEMOTO, Yasutaka , WADA, Hiroki
IPC分类号： C07C51/43 , B01D35/027 , C07C51/47 , C07C57/04 , C07C57/05
摘要： The present invention provides a method for obtaining high-quality products. The present invention relates to a purification apparatus that purifies crystals, the purification apparatus including: a hydraulic wash column that includes a discharging port for a crystal-containing circulation slurry and a return port for a circulation liquid containing a melt of discharged crystals; a pipe that feeds a crystal-containing slurry to the hydraulic wash column; a filter that filters the crystal-containing slurry in the hydraulic wash column; a pipe that is connected to the filter and discharges a mother liquor; and a unit that melts crystals in a circulation slurry discharged through the discharging port, wherein a distance between a lower end of the filter and an average bottom surface level of the hydraulic wash column is 1000 mm or more.
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公开(公告)号：EP4349442A1
公开(公告)日：2024-04-10
申请号：EP22816112.1
申请日：2022-05-31
IPC分类号： B01D9/02 , C07C51/43 , C07C57/055 , B01F27/86
摘要： The present invention provides a method for obtaining a high-quality product. The present invention relates to a tank for use in a purification apparatus, the tank being at least one of a crystallization tank that forms a slurry containing crystals of a compound or a ripening tank that is capable of keeping crystals of a compound suspended in the ripening tank, the tank including: an agitator; and a baffle for generating an upward flow from a swirling flow, the tank being capable of forming a supernatant part consisting of a supernatant and a suspension part where the crystals of a compound are suspended.
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公开(公告)号：EP3255030A1
公开(公告)日：2017-12-13
申请号：EP16746462.7
申请日：2016-01-26
摘要： The objective of the present invention is to provide a method for efficiently producing acrylic acid while troubles not only in a waste oil handling after distillation of acrylic acid but also in a purification system of acrylic acid during distillation are reduced. The method for producing acrylic acid according to the present invention is characterized in comprising the step of supplying at least crude acrylic acid and an alcohol solvent to an acrylic acid distillation apparatus to distill acrylic acid, wherein a boiling point of the alcohol solvent is higher than a boiling point of acrylic acid by not lower than 50°C.
摘要翻译： 本发明的目的是提供一种有效生产丙烯酸的方法，同时减少了丙烯酸蒸馏后废油处理以及蒸馏过程中丙烯酸纯化系统中的麻烦。 根据本发明的制备丙烯酸的方法的特征在于包括以下步骤：将至少粗丙烯酸和醇溶剂供应到丙烯酸蒸馏设备以蒸馏丙烯酸，其中醇溶剂的沸点高于 丙烯酸的沸点不低于50℃。
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公开(公告)号：EP4349445A1
公开(公告)日：2024-04-10
申请号：EP22816119.6
申请日：2022-05-31
IPC分类号： B01D9/02 , C07C51/43 , C07C57/055
摘要： Provided is a method for stably obtaining a product. The present invention relate to a tank for use in a purification apparatus, the tank being: at least one of a crystallization tank that forms a slurry containing crystals of a compound or a ripening tank that is capable of keeping crystals of a compound suspended therein, the tank including a nozzle for feeding a compound-containing solution or a slurry containing crystals of a compound into the tank while the solution or slurry is brought into contact with an inner wall surface of the tank; and a heating mechanism for heating an area of the inner wall surface with which the compound-containing solution or the slurry containing crystals of a compound is to be brought into contact.
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公开(公告)号：EP3632890A1
公开(公告)日：2020-04-08
申请号：EP18806372.1
申请日：2018-05-22
摘要： A method for producing (meth)acrylic acid comprising: a step of obtaining a (meth)acrylic acid-containing gas by subjecting a (meth)acrylic acid production raw material to a catalytic gas phase oxidation reaction; a step of obtaining a (meth)acrylic acid-containing liquid by bringing the (meth)acrylic acid-containing gas into contact with a collection solvent and/or condensing the (meth)acrylic acid-containing gas by cooling; a step of obtaining crude (meth)acrylic acid by introducing the (meth)acrylic acid-containing liquid into a low-boiling separation column; a step of obtaining purified (meth)acrylic acid and a refining residue containing a glyoxal compound by purifying the crude (meth)acrylic acid; and a step of returning at least a part of the refining residue to the low-boiling separation column; wherein a returning position of the refining residue to the low-boiling separation column is located closer to a bottom side of the low-boiling separation column than a supply port of the (meth)acrylic acid-containing liquid.
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公开(公告)号：EP3255030B1
公开(公告)日：2020-03-04
申请号：EP16746462.7
申请日：2016-01-26
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公开(公告)号：EP4353708A1
公开(公告)日：2024-04-17
申请号：EP22816117.0
申请日：2022-05-31
IPC分类号： C07C51/43 , B01D9/02 , C02F1/42 , C07C51/25 , C07C57/055
摘要： The present invention provides a method for efficiently obtaining a high-quality product. The present invention relates to a method for producing an easily polymerizable compound, the method including: mixing an easily polymerizable compound and a manganese-based polymerization inhibitor; adjusting a manganese concentration in an easily polymerizable compound-containing solution obtained through the mixing by bringing at least a portion of the easily polymerizable compound-containing solution into contact with a cation exchange resin; and crystallizing from an easily polymerizable compound-containing solution having a manganese concentration of 5 mass ppm or lower obtained through the adjusting.
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公开(公告)号：EP4212504A1
公开(公告)日：2023-07-19
申请号：EP21866800.2
申请日：2021-09-08
摘要： The present invention provides a method capable of sufficiently reducing impurities with excellent separation efficiency even from a crystal-containing slurry that contains a low-purity mother liquor and has poor solid-liquid separation properties. The present invention relates to a method for producing a compound, the method including: a step of feeding a slurry containing crystals of the compound to a hydraulic wash column; a step of melting crystals in a crystal-containing circulation slurry discharged from the hydraulic wash column; and a step of returning a portion of a circulation liquid containing a melt obtained in the melting step to the hydraulic wash column, wherein the circulation liquid returned in the returning step in an amount of more than 30% by mass relative to 100% by mass of the melt serves as a washing liquid for crystals.
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