会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Method for purifying oxybisphthalic anhydrides
    • 氧邻苯二甲酸酐的纯化方法
    • US07446214B2
    • 2008-11-04
    • US11603764
    • 2006-11-22
    • Albert Santo StellaDavid Bruce Hall
    • Albert Santo StellaDavid Bruce Hall
    • C07D307/89
    • C07D407/12
    • A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4′-oxybisphthalic anhydride (4,4′-ODPA), which are substantially free of residual phase transfer catalyst.
    • 提供了一种纯化二酸酐的方法。 在一个方面,提供了纯的氧化双邻苯二甲酸酐,可用于制备聚醚酰亚胺的中间体。 在一个实施方案中,将含有二酐化合物,溶剂和相转移催化剂的第一溶液与总孔体积为约0.5毫升/克或更大并且累积孔体积分布约为20的固体无机吸附材料接触 百分比或更大的具有在约3纳米和约20纳米之间的孔径的颗粒。 然后将含有二酐化合物的溶液与固体无机吸附材料分离,得到基本上不含相转移催化剂的纯化二酐化合物。 纯化技术对于制备基本上不含残余相转移催化剂的4,4'-氧双苯二甲酸酐(4,4'-ODPA)的高纯度羟基双苯酐具有特别的价值。
    • 9. 发明授权
    • Method for purifying dianhydrides
    • 二酸酐的纯化方法
    • US08134016B2
    • 2012-03-13
    • US12202529
    • 2008-09-02
    • Albert Santo StellaDavid Bruce Hall
    • Albert Santo StellaDavid Bruce Hall
    • C07D405/12
    • C07D407/12
    • A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4′-oxybisphthalic anhydride (4,4′-ODPA), which are substantially free of residual phase transfer catalyst.
    • 提供了一种纯化二酸酐的方法。 在一个方面,提供了纯的氧化双邻苯二甲酸酐,可用于制备聚醚酰亚胺的中间体。 在一个实施方案中,将含有二酐化合物,溶剂和相转移催化剂的第一溶液与总孔体积为约0.5毫升/克或更大并且累积孔体积分布约为20的固体无机吸附材料接触 百分比或更大的具有在约3纳米和约20纳米之间的孔径的颗粒。 然后将含有二酐化合物的溶液与固体无机吸附材料分离,得到基本上不含相转移催化剂的纯化二酐化合物。 纯化技术对于制备基本上不含残余相转移催化剂的4,4'-氧双苯二甲酸酐(4,4'-ODPA)的高纯度羟基双苯酐具有特别的价值。