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    • 78. 发明公开
    • METHOD OF REFINING CRYSTALLINE MATERIAL
    • 精炼结晶材料的方法
    • EP1004337A1
    • 2000-05-31
    • EP98935270.3
    • 1998-07-29
    • Nippon Steel Chemical Co., Ltd.
    • KUWAHARA, HiroyukiHORIBE, KazuyoshiNOMA, NobumasaTAKEUCHI, MasakazuAKIMARU, Yukio
    • B01D9/02C07B63/00
    • B01D9/004
    • This invention relates to a process for purifying crystalline substances by charging the feed crystals containing impurities in a solid state to the top of a tower-type continuous crystallizer equipped with an agitating device, bringing said solid feed crystals into countercurrent contact with the melt formed by melting the descending crystals by a heating device provided in the lower section, taking out the purified crystals as melt from the lower section, and taking out the mother liquor containing the concentrated impurities from the upper section and comprises maintaining the temperature of the mother liquor existing in the upper section in a specified range by either heating the feed crystals or the upper section of the continuous crystallizer or making the average particle diameter of the feed crystals 2.5 mm or more. This procedure makes it possible to form good crystals and a slurry layer in the crystallization tower and yield a crystalline product of high purity in high yield even when applied to feed crystals of reportedly inferior properties.
    • 本发明涉及一种通过将含有固体杂质的进料晶体装入配备有搅拌装置的塔式连续结晶器的顶部来使结晶物质纯化的方法,使所述固体进料晶体与由下列步骤形成的熔体逆流接触: 用设置在下部的加热装置熔化下行晶体,从下部取出作为熔体的纯化晶体,并从上部取出含有浓缩杂质的母液,并包括保持母液温度 通过加热进料晶体或连续结晶器的上部或者使进料晶体的平均粒径为2.5mm或更大来在特定范围内的上部区域中进行。 这种方法使得可以在结晶塔中形成良好的晶体和浆料层,并且甚至当用于喂入据报道性能较差的晶体时,也可以以高收率得到高纯度的结晶产物。
    • 80. 发明公开
    • METHOD FOR PURIFYING CRYSTALLINE SUBSTANCE
    • VERFAHREN ZUR REINIGUNG EINER KRISTALLINEN SUBSTANZ
    • EP0939068A1
    • 1999-09-01
    • EP96941884.7
    • 1996-12-17
    • KABUSHIKI KAISHA KOBE SEIKO SHO
    • NAGAOKA, Koichi, Corporate Res. Labs. Kobe SteelYAMAMOTO, Koji, Corporate Res. Labs. Kobe SteelMOTOYUKI, Masahiro, Osaka Branch in Kobe Steel Ltd
    • C07B63/00B01D9/02C07C15/24C07C7/14
    • C07B63/00C07C7/14C07C15/24
    • A method for purifying a particular substance from a mixture containing the same employs steps (1) and (2a), or (2b), stated below to thereby recover the particular substance of high purity in high yield from the mixture by relatively easy operation:

      (1) subjecting the mixture in the form of a liquid or a slurry in which part of the particular substance has crystallized to crystallization operation under high pressure to increase the amount of crystals of the particular substance to thereby obtain crystals enriched with the particular substance; and
      (2a) dissolving the crystals enriched with the particular substance obtained in the above step in a solvent capable of well dissolving the crystals and subjecting a resultant solution to cooling crystallization to recrystallize the particular substance; or
      (2b) rinsing the crystals enriched with the particular substance obtained in the above step with a solvent capable of dissolving the crystals.
    • 从含有该物质的混合物的混合物中纯化特定物质的方法采用下述步骤(1)和(2a)或(2b),从而通过相对容易的操作从混合物中以高收率回收高纯度的特定物质: (1)使混合物以特定物质的一部分结晶的液体或浆料的形式在高压下进行结晶操作,以增加特定物质的晶体的量,从而获得富含特定物质的晶体; 和(2a)将富含上述步骤中获得的特定物质的晶体溶解在能够很好地溶解晶体的溶剂中,并使所得溶液冷却结晶以使特定物质重结晶; 或(2b)用能够溶解晶体的溶剂冲洗富含上述步骤中得到的特定物质的晶体。