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    • 2. 发明授权
    • 메틸아세테이트의 향상된 가수분해 방법
    • 甲基乙酸酯水解的改进
    • KR100888065B1
    • 2009-03-11
    • KR1020070116516
    • 2007-11-15
    • 아신기술 주식회사
    • 이면기권덕준이동원
    • C07B41/00C07C69/02C07C69/14
    • C07C53/08C07B41/02C07B41/08C07C29/095C07C29/80C07C31/04C07C51/09C07C51/44C07C69/02
    • A hydrolysis method for methyl acetate is provided to raise the hydrolysis efficiency and to separate and collect the acetic acid aqueous solution and methanol of high purity by removing organic impurities contained in the methyl acetate generated from the process of producing an aromatic acid or polyvinyl alcohol. A hydrolysis method for methyl acetate comprises (a) a step of feeding a mixed solution consisting of methyl acetate(1) containing organic impurities selected from xylene, propyl acetate, benzene or their mixture, and water(2) to an extractor(21), injecting water or aromatic organic solvent in the extractor, separating organic impurities by inducing the phase separation of an aqueous phase and an organic phase, and recirculating the aqueous phase to a mixing tank; (b) a step of generating acetic acid and methanol through the hydrolysis of methyl acetate by feeding the mixed solution to a hydrolysis reactor filled with a solid acid catalyst, and feeding the reactant containing acetic acid and methanol to the upper part of the first evaporator(7); (c) a step of recirculating the un-reacted methyl acetate to the mixing tank, and feeding the mixed solution of acetic acid, methanol and water from the lower part to the second evaporator(13); and (d) a step of separating the acetic acid aqueous solution(15) and methanol(17) in the second evaporator, refluxing the condensed water by a condenser(19) of the upper part and recirculating the condensed water to the mixing tank.
    • 提供乙酸甲酯的水解方法以提高水解效率,并且通过除去由生产芳族酸或聚乙烯醇的方法产生的乙酸甲酯中含有的有机杂质,分离和收集高纯度的乙酸水溶液和甲醇。 乙酸甲酯的水解方法包括(a)将含有选自二甲苯,乙酸丙酯,苯或其混合物中的有机杂质的乙酸甲酯(1)和水(2)的混合溶液进料到提取器(21)的步骤, 在萃取器中注入水或芳族有机溶剂,通过诱导水相和有机相的相分离,并将水相再循环到混合罐中来分离有机杂质; (b)通过将混合溶液加入填充有固体酸催化剂的水解反应器中,通过乙酸甲酯的水解产生乙酸和甲醇的步骤,并将含有乙酸和甲醇的反应物进料到第一蒸发器的上部 (7); (c)将未反应的乙酸甲酯再循环到混合罐中,并将乙酸,甲醇和水的混合溶液从下部供给到第二蒸发器(13)的步骤; 和(d)在第二蒸发器中分离乙酸水溶液(15)和甲醇(17)的步骤,通过上部的冷凝器(19)回流冷凝水并将冷凝水再循环到混合罐。
    • 4. 发明授权
    • 초산폐수의 처리 방법 및 장치
    • 초산폐수의처리방법및장치
    • KR100381453B1
    • 2003-05-01
    • KR1020000068123
    • 2000-11-16
    • 아신기술 주식회사
    • 이면기최영
    • C02F9/02
    • PURPOSE: A method for treating wastewater containing acetic acid and apparatus therefor are provided to recycle acetic acid discharged from chemical industries into methyl acetate. CONSTITUTION: According to the method, wastewater contained acetic acid is passed through a reactor(1)(2) packed with activated carbon for adsorbing acetic acid. And water and methanol are injected to desorb adsorbed acetic acid. Desorbed acetic acid and methanol are flowed to cation exchange resin catalyst of lower part of the reactor(1)(2) for esterification thereof. Methyl acetate of esterification product is separated by a separation tower(4). And separated methyl acetate is condensed in a condenser(5). Esterification process is operated at 50-98 deg.C.
    • 目的:提供一种处理含乙酸废水的方法及其装置,以将从化学工业排出的乙酸再循环到乙酸甲酯中。 组成:根据该方法,含有乙酸的废水通过填充有活性炭的反应器(1)(2)以吸附乙酸。 注入水和甲醇以解吸吸附的乙酸。 解吸的乙酸和甲醇流入反应器下部(1)(2)的阳离子交换树脂催化剂进行酯化。 酯化产物的乙酸甲酯通过分离塔(4)分离。 分离的乙酸甲酯在冷凝器(5)中冷凝。 酯化过程在50-98℃下进行。
    • 6. 发明授权
    • 트리멜리트산 및 촉매의 회수방법 및 장치
    • 트리멜리트산및촉매의회수방법및장치
    • KR100431688B1
    • 2004-05-17
    • KR1020010036483
    • 2001-06-26
    • 아신기술 주식회사
    • 이면기장종하김준영
    • C07C51/43
    • PURPOSE: Provided are a method and a device for effectively recovering a trimellitic acid and trimellitic anhydride, and catalyst from industrial waste comprising polymer pollutant generated during production of trimellitic anhydride, and recycling the same. CONSTITUTION: The method comprises the steps of (i) adding water to stream comprising trimellitic anhydride, trimellitic acid and catalyst during production of trimellitic anhydride and dissolving the trimellitic acid and trimellitic anhydride into water; (ii) passing the solution through filter containing adsorbent layer to removing impurities; (iii) introducing the solution having not impurities into crystallization bath(10) to crystallize the trimellitic acid; and (iv) recovering the crystallized solid trimellitic acid and liquid catalyst by solid/liquid separation, respectively.
    • 用途:提供一种有效回收偏苯三酸和偏苯三酸酐的方法和装置,以及由偏苯三酸酐生产过程中产生的含聚合物污染物的工业废物制成的催化剂,并将其再循环。 构成:该方法包括以下步骤:(i)在生产偏苯三酸酐期间向包含偏苯三酸酐,偏苯三酸和催化剂的物流中加水,并将偏苯三酸和偏苯三酸酐溶解在水中; (ii)使溶液通过含有吸附剂层的过滤器以除去杂质; (iii)将没有杂质的溶液引入结晶浴(10)中以使偏苯三酸结晶; 和(iv)分别通过固/液分离回收结晶固体偏苯三酸和液体催化剂。
    • 7. 发明公开
    • 트리멜리트산 및 촉매의 회수방법 및 장치
    • 回收三叶酸和催化剂的方法和装置
    • KR1020020089103A
    • 2002-11-29
    • KR1020010036483
    • 2001-06-26
    • 아신기술 주식회사
    • 이면기장종하김준영
    • C07C51/43
    • PURPOSE: Provided are a method and a device for effectively recovering a trimellitic acid and trimellitic anhydride, and catalyst from industrial waste comprising polymer pollutant generated during production of trimellitic anhydride, and recycling the same. CONSTITUTION: The method comprises the steps of (i) adding water to stream comprising trimellitic anhydride, trimellitic acid and catalyst during production of trimellitic anhydride and dissolving the trimellitic acid and trimellitic anhydride into water; (ii) passing the solution through filter containing adsorbent layer to removing impurities; (iii) introducing the solution having not impurities into crystallization bath(10) to crystallize the trimellitic acid; and (iv) recovering the crystallized solid trimellitic acid and liquid catalyst by solid/liquid separation, respectively.
    • 目的:提供一种用于有效回收偏苯三酸和偏苯三酸酐的方法和装置,以及包含在偏苯三酸酐生产过程中产生的聚合物污染物的工业废物的催化剂,并回收它们。 方法:该方法包括以下步骤:(i)在偏苯三酸酐生产过程中将偏苯三酸酐,偏苯三酸和催化剂的水加入水中,并将偏苯三酸和偏苯三酸酐溶解在水中; (ii)使溶液通过含有吸附剂层的过滤器去除杂质; (iii)将没有杂质的溶液引入结晶浴(10)中以结晶偏苯三酸; 和(iv)分别通过固/液分离回收结晶的固体偏苯三酸和液体催化剂。
    • 10. 发明公开
    • 메틸아세테이트의 가수분해 방법 및 장치
    • 乙酸甲酯水解方法及装置
    • KR1020000072037A
    • 2000-12-05
    • KR1020000039788
    • 2000-07-12
    • 아신기술 주식회사
    • 이면기김태정
    • C07B41/00
    • C07C51/09C07C29/095C07C51/44Y02P20/127C07C31/04C07C53/08
    • PURPOSE: A method and apparatus for hydrolyzing methyl acetate using a reactor with a fixed catalyst layer and separating acetic acid and methanol are provided which can reutilize methyl acetate that has been hitherto discarded as useless waste, improve hydrolysis efficiency and remarkably reduce investment cost and energy consumption. CONSTITUTION: The hydrolyzing method of methyl acetate comprises the steps of introducing methyl acetate or methyl mixtures and water at the same time into a condensate line at the upper part of a reactor (1) at 50 to 80°C and preparing a reaction mixture by liquid reaction in the reactor filled with a strong acid cation exchange resin catalyst; condensing the reaction mixture at a methylacetate separation tower (2), separating methylacetate at a condenser (3) and discharging acetic acid and methanol as a reaction product with the remaining water from the separation tower; and transferring mixtures from the separator to an acetic acid recovering tower (7) and separating acetic acid and methanol. The apparatus comprises a reactor, a separation tower and an acetic acid recovering tower, wherein a condenser and a condensate line connected to a pump (4) are installed between the reactor and the separation, a pump (6) between the separation tower and the acetic acid recovering tower, a reboiler (5) at the separation tower, a methanol storing tank (C) and an acetic storing tank (D) are connected to the acetic recovering tower.
    • 目的:提供一种使用具有固定催化剂层和分离乙酸和甲醇的反应器水解乙酸甲酯的方法和装置,其可以将迄今为止被废弃的乙酸甲酯再利用,作为无用的废物,提高水解效率并显着降低投资成本和能量 消费。 构成:乙酸甲酯的水解方法包括以下步骤:将乙酸甲酯或甲基混合物和水同时引入反应器(1)上部的冷凝液管线中,在50至80℃下,通过以下步骤制备反应混合物: 在反应器中的液体反应填充有强酸阳离子交换树脂催化剂; 将反应混合物在甲酸乙酯分离塔(2)冷凝,在冷凝器(3)分离乙酸甲酯,并将乙酸和甲醇作为与来自分离塔的剩余水反应产物; 并将混合物从分离器转移到乙酸回收塔(7)并分离乙酸和甲醇。 该设备包括反应器,分离塔和乙酸回收塔,其中连接到泵(4)的冷凝器和冷凝管路安装在反应器和分离器之间,在分离塔和分离塔之间的泵(6) 乙酸回收塔,分离塔处的再沸器(5),甲醇储存罐(C)和乙酸储存罐(D)连接到乙酸回收塔。