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1. 发明授权

US06491795B2 Process for recovering benzyl benzoate 失效
标题翻译：回收苯甲酸苄酯的方法
公开(公告)号：US06491795B2
公开(公告)日：2002-12-10
申请号：US09778838
申请日：2001-02-08
申请人： Noboru Daitou , Shingo Ueda , Ryouji Akamine , Kazuyoshi Horibe , Katsuhiko Sakura
发明人： Noboru Daitou , Shingo Ueda , Ryouji Akamine , Kazuyoshi Horibe , Katsuhiko Sakura
IPC分类号： B01D300
CPC分类号： C07C67/52 , C07C51/44 , C07C67/54 , Y10S203/11 , Y10S203/17 , C07C63/06 , C07C69/78
摘要： High-purity benzyl benzoate is recovered by distilling the residue remaining after removal of unreacted toluene and benzoic acid from a reaction mixture produced by the oxidation of toluene by molecular oxygen in the presence of a metal catalyst thereby separating a fraction of benzyl benzoate containing 80 wt % or more benzyl benzoate, 10 wt % or less benzoic acid and 10 wt % or less fluorenone, and purifying the fraction of benzyl benzoate by crystallization such as recrystallization. According to this process, it is possible to recover high-purity benzyl benzoate by a simple operation at low cost from the by-product formed in the manufacture of benzoic acid.
摘要翻译：通过在由金属催化剂的存在下通过分子氧氧化甲苯产生的反应混合物中除去未反应的甲苯和苯甲酸后残留的残余物回收高纯度苯甲酸苄酯，由此分离出含有80重量％的苯甲酸苄酯％以上的苯甲酸苄酯，10重量％以下的苯甲酸和10重量％以下的芴酮，通过结晶例如重结晶纯化苯甲酸苄酯的馏分。根据该方法，可以通过在苯甲酸的制造中形成的副产物的低成本的简单操作来回收高纯度苯甲酸苄酯。

2. 发明授权

US07049389B2 Process for preparing of aromatic oligomers 有权
标题翻译：芳族低聚物的制备方法
公开(公告)号：US07049389B2
公开(公告)日：2006-05-23
申请号：US10496139
申请日：2002-12-26
申请人： Toshihide Senzaki , Takahiro Imamura , Kazuyoshi Horibe , Tomoaki Yoshida , Atsuhiko Katayama , Yasuo Wada , Katsuhide Noguchi
发明人： Toshihide Senzaki , Takahiro Imamura , Kazuyoshi Horibe , Tomoaki Yoshida , Atsuhiko Katayama , Yasuo Wada , Katsuhide Noguchi
IPC分类号： C08G10/02 , C07C7/10
CPC分类号： C08G10/02
摘要： This invention relates to a process for preparing high-purity aromatic oligomers by effectively separating an organic layer containing aromatic oligomers or the reaction products of a polycyclic aromatic compound with formaldehyde from an aqueous layer containing an acid catalyst in a simplified manner, hitherto regarded difficult to accomplish, and obtaining high-purity aromatic oligomers from the organic layer containing a reduced amount of impurities. In separating the aqueous layer containing the acid catalyst and the organic layer containing the oligomers from the reaction mixture formed by the condensation of a polycyclic aromatic compound and formaldehyde, the emulsion phase is broken by adding a nonionic or cationic surfactant in an effective amount and an alkali in an amount sufficient to neutralize 1–70% of the acid in the acid catalyst, the organic and aqueous layers are separated and the aromatic oligomers are recovered from the organic layer.
摘要翻译：本发明涉及一种制备高纯度芳族低聚物的方法，该方法通过以简单的方式从含有酸催化剂的水层中有效地分离含有芳族低聚物的有机层或多环芳族化合物与甲醛的反应产物，至今被认为难以从含有少量杂质的有机层中获得高纯度芳族低聚物。在将含有酸催化剂的水层和含有低聚物的有机层从由多环芳族化合物和甲醛缩合形成的反应混合物中分离时，通过加入有效量的非离子或阳离子表面活性剂和碱的量足以中和酸催化剂中的1-70％的酸，分离有机层和水层，并从有机层中回收芳族低聚物。

3. 发明授权

US06211404B1 Method of refining benzoic acid 失效
标题翻译：精制苯甲酸的方法
公开(公告)号：US06211404B1
公开(公告)日：2001-04-03
申请号：US09269552
申请日：1999-03-30
申请人： Hiroyuki Kuwahara , Yuji Arifuku , Kazuyoshi Horibe , Nobumasa Noma , Masakazu Takeuchi , Haruki Kawano
发明人： Hiroyuki Kuwahara , Yuji Arifuku , Kazuyoshi Horibe , Nobumasa Noma , Masakazu Takeuchi , Haruki Kawano
IPC分类号： C07C5142
CPC分类号： B01D9/004 , C07C51/43 , C07C63/06
摘要： This invention relates to a process for purifying benzoic acid continuously to a purity of 99.9% or more by introducing crystals of crude benzoic acid with a bulk density of 0.2 g/cm3 or more and an average particle diameter of 0.3 mm or more into a continuous crystallization apparatus equipped with a stirrer and a heating device from the upper portion of the apparatus, effecting counter-current contact of the falling crystals of crude benzoic acid with the melt generated by heating with the heating device, withdrawing the purified benzoic acid as melt from the lower portion of the apparatus, and withdrawing the mother liquor from the upper portion of the apparatus. The process makes it possible to prepare high-purity benzoic acid continuously in a relatively simple apparatus at high efficiency.
摘要翻译：本发明涉及通过将堆积密度为0.2g / cm 3以上，平均粒径为0.3mm以上的粗苯甲酸的结晶引入到连续的方式，连续纯化苯甲酸至99.9％以上的方法从装置的上部装配有搅拌器和加热装置的结晶装置，使粗苯甲酸的降落晶体与通过加热装置加热产生的熔体逆流接触，将纯化的苯甲酸作为熔体从设备的下部，并从母体的上部排出母液。该方法使得可以在相对简单的装置中以高效率连续制备高纯度苯甲酸。

4. 发明授权

US06403828B1 Method of refining crystalline material 有权
标题翻译：澄清晶体材料的方法
公开(公告)号：US06403828B1
公开(公告)日：2002-06-11
申请号：US09462888
申请日：2000-01-18
申请人： Hiroyuki Kuwahara , Kazuyoshi Horibe , Nobumasa Noma , Masakazu Takeuchi , Yukio Akimaru
发明人： Hiroyuki Kuwahara , Kazuyoshi Horibe , Nobumasa Noma , Masakazu Takeuchi , Yukio Akimaru
IPC分类号： C07C5142
CPC分类号： B01D9/004
摘要： 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.
摘要翻译：本发明涉及一种通过将装有固态杂质的进料晶体装入装有搅拌装置的塔式连续结晶器的顶部来提纯结晶物质的方法，使所述固体进料晶体与熔融物形成的熔体逆流接触通过设置在下部的加热装置熔化下降的晶体，从下部取出熔化的纯化晶体，从上部取出含有浓缩杂质的母液，并包括保持母液的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以上，在上部的规定范围内。该方法使得可以在结晶塔中形成良好的晶体和浆料层，并且甚至在应用于报道较差的性质的进料晶体时，可以高产率产生高纯度的结晶产物。

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