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    • 4. 发明授权
    • Method for preparation of salts of hydroxy-substituted aromatic compounds
    • 羟基取代芳族化合物的盐的制备方法
    • US07902407B2
    • 2011-03-08
    • US11095200
    • 2005-03-30
    • James Manio SilvaThomas Link GuggenheimDavid Winfield Woodruff
    • James Manio SilvaThomas Link GuggenheimDavid Winfield Woodruff
    • C07C39/12C07C39/16
    • C07C37/66C07C39/235
    • A method for preparing a metal salt of a hydroxy-substituted aromatic compound is described. The method comprises contacting in an aqueous medium at least one hydroxy-substituted aromatic compound with a base comprising a metal cation to provide a mixture comprising water and a metal salt of said hydroxy-substituted aromatic compound. The aqueous metal salt is then contacted with a substantially water-immiscible solvent at a temperature greater than the boiling point of water at the prevailing pressure to provide a slurry comprising the metal salt of the hydroxy-substituted aromatic compound and a vapor stream comprising the water-immiscible solvent and water. The components of the vapor stream are separated using a vapor handling system comprising a partial reflux condenser to provide a water-rich component and a water immiscible solvent-rich component.
    • 描述了制备羟基取代的芳族化合物的金属盐的方法。 该方法包括在含水介质中使至少一种羟基取代的芳族化合物与包含金属阳离子的碱接触以提供包含水和所述羟基取代的芳族化合物的金属盐的混合物。 然后在主要压力下,在大于沸点的温度下,将水性金属盐与基本上与水不混溶的溶剂接触,以提供包含羟基取代的芳族化合物的金属盐和包含水的蒸汽流的浆料 可混溶的溶剂和水。 使用包含部分回流冷凝器的蒸汽处理系统分离蒸气流的组分以提供富含水的组分和与水不混溶的富含溶剂的组分。
    • 7. 发明授权
    • Process to isolate dianhydrides
    • 分离二酸酐的方法
    • US06710187B2
    • 2004-03-23
    • US10063795
    • 2002-05-14
    • Thomas Link GuggenheimDavid Anthony Mongilio
    • Thomas Link GuggenheimDavid Anthony Mongilio
    • C07D30789
    • C07C51/573Y10S159/901C07C65/24
    • A process to isolate dianhydride from an exchange reaction comprises extracting a bisimide/anhydride exchange reaction aqueous phase with an organic solution comprising an exchange catalyst at a first temperature and pressure to form an extracted aqueous phase comprising water, exchange catalyst and a dianhydride precursor; removing water from the extracted aqueous phase at a second temperature and pressure to form a molten phase, wherein the second pressure is less than the first pressure; removing water and exchange catalyst from the molten phase at a third temperature and pressure to form an isolation mixture; and converting the dianhydride precursor in the isolation mixture to dianhydride at a fourth temperature and pressure, wherein the fourth temperature is greater than the second and third temperatures and the fourth pressure is less than the second and third pressures.
    • 从交换反应中分离二酐的方法包括在第一温度和压力下用包含交换催化剂的有机溶液萃取双酰亚胺/酸酐交换反应水相以形成包含水,交换催化剂和二酐前体的萃取水相; 在第二温度和压力下从提取的水相中除去水以形成熔融相,其中第二压力小于第一压力; 在第三温度和压力下除去水并从熔融相中交换催化剂以形成分离混合物; 以及在第四温度和压力下将分离混合物中的二酐前体转化为二酐,其中第四温度大于第二和第三温度,第四压力小于第二和第三压力。