Process for the synthesis of 2,5-dihydroxyterephthalic acid
    43.
    发明授权
    Process for the synthesis of 2,5-dihydroxyterephthalic acid 失效
    2,5-二羟基对苯二甲酸合成方法

    公开(公告)号:US07339076B1

    公开(公告)日:2008-03-04

    申请号:US11604937

    申请日:2006-11-28

    申请人: Joachim C. Ritter

    发明人: Joachim C. Ritter

    IPC分类号: C07C63/00

    摘要: 2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions.

    摘要翻译: 通过与铜源和在碱性条件下与铜配位的配体接触,从2,5-二卤对苯二甲酸以高产率和高纯度生产2,5-二羟基对苯二甲酸。

    Manufacture of oxalic acid dihydrate
    44.
    发明授权
    Manufacture of oxalic acid dihydrate 失效
    草酸二水合物的制造

    公开(公告)号:US07244862B2

    公开(公告)日:2007-07-17

    申请号:US11228378

    申请日:2005-09-16

    IPC分类号: C07C55/06

    摘要: A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.

    摘要翻译: 制备草酸二水合物的方法,其中草酸钠水溶液与盐酸接触,然后将所得混合物冷却以沉淀草酸,然后任选地将草酸钠和盐酸回收并再循环到反应室中 。

    Process for producing optically active flurbiprofen
    45.
    发明授权
    Process for producing optically active flurbiprofen 有权
    光学活性氟比洛芬的制备方法

    公开(公告)号:US07214820B2

    公开(公告)日:2007-05-08

    申请号:US10543186

    申请日:2004-01-20

    IPC分类号: C07B57/00

    摘要: The present invention provides a method for producing optically active flurbiprofen. The method of the present invention includes mixing racemic flurbiprofen and (S)- or (R)-3-methyl-2-phenylbutylamine in an organic solvent to produce a diastereomeric salt; and treating the diastereomeric salt with an acid in a second solvent. In the method of the present invention, flurbiprofen having a desired absolute configuration can be obtained very efficiently without repeating the procedure for optical resolution a plurality of times.

    摘要翻译: 本发明提供一种光学活性氟比洛芬的制备方法。 本发明的方法包括将外消旋氟比洛芬和(S) - 或(R)-3-甲基-2-苯基丁胺在有机溶剂中混合以产生非对映体盐; 并在第二溶剂中用酸处理非对映体盐。 在本发明的方法中,可以非常有效地获得具有期望的绝对构型的氟比洛芬,而不用多次重复光学拆分的步骤。

    Process for preparing fluorocarboxylic acids
    46.
    发明授权
    Process for preparing fluorocarboxylic acids 有权
    制备氟代羧酸的方法

    公开(公告)号:US07126016B2

    公开(公告)日:2006-10-24

    申请号:US11088465

    申请日:2005-03-24

    IPC分类号: C07C51/00

    摘要: A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid so as to form a sulfate-containing fluorocarboxylic acid phase; and subjecting the fluorocarboxylic acid phase to washing treatment using an aqueous sulfuric acid solution.

    摘要翻译: 氟代羧酸制备方法连续进行酸化反应处理和洗涤处理,包括在含硫酸盐存在下使含氟羧酸酯的水溶液进行酸化反应处理以形成含硫酸盐的氟代羧酸相; 并使用硫酸水溶液对氟代羧酸相进行洗涤处理。

    Method for crystallization of hydroxycarboxylic acids
    48.
    发明申请
    Method for crystallization of hydroxycarboxylic acids 失效
    羟基羧酸结晶方法

    公开(公告)号:US20050075508A1

    公开(公告)日:2005-04-07

    申请号:US10362460

    申请日:2001-09-07

    摘要: The invention aims at producing high-purity crystals of a hydroxycarboxylic acid represented by the following formula (1): in high yield. Provided are a method for crystallization of a compound (1) which comprises acidifying a mixture of a solution of an alkali salt of the compound (1) and an organic solvent, and a method for crystallization of compound (1) by mixing a solution of the compound (1) in a water-miscible good solvent with water, in which a slurry with a necessary suspension amount of the compound (1) for inhibiting oil formation and scaling is prepared in advance and then a main crystallization is carried out in the presence of said slurry.

    摘要翻译: 本发明旨在以高产率制备由下式(1)表示的羟基羧酸的高纯度晶体。 提供化合物(1)的结晶方法,其包括酸化化合物(1)的碱金属盐和有机溶剂的溶液的混合物,以及通过将化合物(1)的溶液 将与化合物(1)在水混溶性好的溶剂中与水一起预先制备具有用于抑制油形成和结垢的化合物(1)所需悬浮液量的浆料,然后进行主结晶 所述浆料的存在。

    Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate
    49.
    发明申请
    Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate 失效
    从含有酒石酸钾的原料中连续回收游离酒石酸的方法

    公开(公告)号:US20040232078A1

    公开(公告)日:2004-11-25

    申请号:US10789704

    申请日:2004-02-26

    IPC分类号: B01D061/00

    摘要: In the process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate, the same are mixed with water and the potassium hydrogentartrate is dissolved. The process is improved in that the suspension is decanted, the clarified liquid is refiltered, the filtrate is cooled to crystallization temperature under a vacuum, the potassium hydrogentartrate crystals formed are dissolved, the solution is subject to a cation exchange, and the tartaric acid solution obtained is evaporated.

    摘要翻译: 在从含有酒石酸钾的原料中连续回收游离酒石酸的过程中,将其与水混合,并溶解氢化酒石酸钾。 改进方法是将悬浮液倾析,将澄清的液体重新过滤,将滤液在真空下冷却至结晶温度,将形成的氢化酒石酸晶体溶解,将溶液进行阳离子交换,并将酒石酸溶液 获得的蒸发。