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    • 2. 发明申请
    • METHOD FOR PURIFYING DIANHYDRIDES
    • 纯化二氢呋喃的方法
    • WO2008063207A1
    • 2008-05-29
    • PCT/US2007/004982
    • 2007-02-27
    • GENERAL ELECTRIC COMPANYSTELLA, Albert, SantoHALL, David, Bruce
    • STELLA, Albert, SantoHALL, David, Bruce
    • C07D407/12
    • 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。
    • 3. 发明申请
    • METHOD FOR PURIFYING BISIMIDES
    • 纯化双歧杆菌的方法
    • WO2008063208A1
    • 2008-05-29
    • PCT/US2007/004985
    • 2007-02-27
    • GENERAL ELECTRIC COMPANYSTELLA, Albert, SantoHALL, David, Bruce
    • STELLA, Albert, SantoHALL, David, Bruce
    • C07D209/48C07B63/00
    • C07D209/48
    • A method for purifying bisimides is provided. In one aspect, purified oxybisphthalimides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a bisimide 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 bisimide compound is then separated from the solid inorganic adsorbent material to provide a purified bisimide compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalimides, such as 4,4'-oxybis(N-methylphthalimide), which are substantially free of residual phase transfer catalyst.
    • 提供了一种纯化双酰亚胺的方法。 一方面,提供了纯化的氧联双苯二酰亚胺,可用于制备聚醚酰亚胺的中间体。 在一个实施方案中,将含有双酰亚胺化合物,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。 然后将含有双酰亚胺化合物的溶液与固体无机吸附剂材料分离,以提供基本上不含相转移催化剂的纯化双酰亚胺化合物。 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(N-甲基邻苯二甲酰亚胺)的高纯度氧联双苯二酰亚胺是特别有价值的。
    • 4. 发明申请
    • METHOD FOR MAKING POLYETHERIMIDES
    • 制备聚乙二醇的方法
    • WO2008063206A1
    • 2008-05-29
    • PCT/US2007/004939
    • 2007-02-27
    • GENERAL ELECTRIC COMPANYSTELLA, Albert, SantoHALL, David, Bruce
    • STELLA, Albert, SantoHALL, David, Bruce
    • C07C51/00C07C51/567C07C51/573C08G73/00C08G73/10C08G73/12
    • C08G73/1007C07C51/573C08G73/1014C08G73/1028C08G73/105C07C65/24
    • A method for making polyetherimides is provided by reacting a high purity dianhydride with an aromatic diamine under condensation polymerization conditions. The dianhydrides employed are purified by a method comprising contacting a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst, 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 purified dianhydrides are then condensed with aromatic diamines to provide polyetherimide compositions which are substantially free of residual phase transfer catalyst.
    • 通过在缩聚条件下使高纯度二酐与芳族二胺反应来提供制备聚醚酰亚胺的方法。 所用的二酸酐通过包括将含有二酐化合物,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/克或更大的固体无机吸附材料和累积孔 约20%或更大的孔径在约3纳米至约20纳米之间的颗粒的体积分布。 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。 然后将纯化的二酸酐与芳族二胺缩合,得到基本上不含残余相转移催化剂的聚醚酰亚胺组合物。