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    Method for producing high-purity terephthalic acid
    6.
    发明授权
    Method for producing high-purity terephthalic acid 有权

    公开(公告)号：US10273197B2

    公开(公告)日：2019-04-30

    申请号：US15745738

    申请日：2016-07-21

    申请人： Mitsubishi Gas Chemical Company, Inc.

    发明人： Goh Nakamura ,  Hideaki Fujita ,  Kotaro Murakami

    IPC分类号： C07C51/43 ,  C07C51/265 ,  C07C51/487 ,  C07C63/26

    摘要： A method for producing high-purity terephthalic acid, comprising following steps (a) to (c): the step (a); obtaining crude terephthalic acid crystal by liquid phase-oxidizing a p-phenylene compound; the step (b); obtaining a terephthalic acid crystal slurry by a catalytic hydrogenation treatment of the crude terephthalic acid crystal; and the step (c); introducing the terephthalic acid crystal slurry into an upper portion of a mother liquor replacement tower, and bringing the slurry into contact with an upward flow of replacement water introduced from a bottom portion of the mother liquor replacement tower while making the terephthalic acid crystal settled down in the tower, and extracting the terephthalic acid crystal as a slurry with the replacement water from the tower bottom portion, wherein (1) a stirring blade unit is disposed in a slurry layer in the bottom portion of the mother liquor replacement tower, and fluidity of the slurry layer is maintained by rotating the stirring blade unit in such a way that stirring power is 0.1 to 1.0 kWh/m3 per unit volume of the slurry layer, and (2) the replacement water is fed through the replacement water feed opening provided in the stirring blade unit.

    COPOLYMER, AND METHOD FOR PREPARING A MONOMER USED TO FORM THE COPOLYMER
    7.
    发明申请
    COPOLYMER, AND METHOD FOR PREPARING A MONOMER USED TO FORM THE COPOLYMER 有权
    共聚物和用于制备用于形成共聚物的单体的方法

    公开(公告)号：US20150344414A1

    公开(公告)日：2015-12-03

    申请号：US14724048

    申请日：2015-05-28

    申请人： INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

    发明人： Tun-Fun WAY ,  Jiun-Jy CHEN ,  Cheng YEH ,  Yu-Ting CHEN

    IPC分类号： C07C233/64 ,  C08G69/44 ,  C07C63/26 ,  C08G69/12

    CPC分类号： C08G69/44 ,  C07C231/02 ,  C08G69/265 ,  C08G69/28 ,  C07C233/83

    摘要： A copolymer, and a method for preparing a monomer used to form the copolymer are provided. The copolymer is a reaction product of a first monomer and a second monomer. In particular, the first monomer has a structure represented by Formula (I), and the second monomer has a structure represented by Formula (II), Formula (III), or Formula (IV) wherein Y is —NH2, or —CO2H; m is a positive integer from 2 to 10; X is independently —NH2, or —OH; A is CH2n, n is a positive integer from 2 to 10; and, l is a positive integer from 1 to 5.

    摘要翻译： 提供共聚物和制备用于形成共聚物的单体的方法。 该共聚物是第一单体和第二单体的反应产物。 特别地，第一单体具有由式（I）表示的结构，第二单体具有由式（II），式（III）或式（IV）表示的结构，其中Y是-NH 2或-CO 2 H; m是2至10的正整数; X独立地是-NH 2或-OH; A为CH2n，n为2至10的正整数; l为1〜5的正整数。

    PROCESS FOR THE SYNTHESIS OF 2,6-DIAMINO-3,5-DINITROTOLUENE
    8.
    发明申请
    PROCESS FOR THE SYNTHESIS OF 2,6-DIAMINO-3,5-DINITROTOLUENE 失效
    2,6-二氨基-3,5-哌啶酮的合成方法

    公开(公告)号：US20100160678A1

    公开(公告)日：2010-06-24

    申请号：US12634767

    申请日：2009-12-10

    申请人： RAJIV DHAWAN ,  Joachim C. Ritter

    发明人： RAJIV DHAWAN ,  Joachim C. Ritter

    IPC分类号： C07C63/26 ,  C07C209/10

    CPC分类号： C07C211/50 ,  C07C51/412 ,  C07C209/10 ,  C07C211/52

    摘要： An improved process is provided for the preparation of 2,6-diamino-3,5-dinitrotoluene by amination of 2,6-dichloro-3,5-dinitrotoluene. The presence of water unexpectedly results in a highly pure product, free of glycol ether impurities. This product can be used to make highly pure 2,3,5,6-tetraaminotoluene, which in turn can be used to make high molecular weight polybenzimidazoles for high strength fibers.

    摘要翻译： 提供了通过2,6-二氯-3,5-二硝基甲苯的胺化制备2,6-二氨基-3,5-二硝基甲苯的改进方法。 水的存在意外地导致高纯度的产品，不含二醇醚杂质。 该产品可用于制备高纯度的2,3,5,6-四氨基甲苯，其又可用于制备用于高强度纤维的高分子量聚苯并咪唑。