公开(公告)号：JP2011057621A

公开(公告)日：2011-03-24

申请号：JP2009209389

申请日：2009-09-10

Applicant: Air Water Inc ,  エア・ウォーター株式会社

Inventor： OKAMOTO ETSUYA ,  NAMEKATA TAKESHI ,  ITO IKUO

IPC: C07D307/89

Abstract: PROBLEM TO BE SOLVED: To provide a method for economically efficiently producing a high-purity diester of trimellitic anhydride.
SOLUTION: The method for producing the diester of the trimellitic anhydride by reacting trimellitic anhydride chloride with a dihydroxy compound in the presence of a base includes collecting the diester of the trimellitic anhydride as a filtered product by adding acetic acid after the reaction.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 待解决的问题：提供一种经济有效地制备偏苯三酸酐的高纯度二酯的方法。 解决方案：在碱存在下，将偏苯三酸酐氯化物与二羟基化合物反应制备偏苯三酸酐的二酯的方法包括通过在反应后加入乙酸收集偏苯三酸酐的二酯作为过滤产物。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011006330A

公开(公告)日：2011-01-13

申请号：JP2009148719

申请日：2009-06-23

Applicant: Air Water Inc ,  エア・ウォーター株式会社

Inventor： NAMEKATA TAKESHI ,  ITO IKUO ,  OKAMOTO ETSUYA

IPC: C07D307/89

Abstract: PROBLEM TO BE SOLVED: To provide a method for economically and efficiently producing a high-purity aromatic carboxylic acid dianhydride having an ester group.SOLUTION: The method for producing the aromatic carboxylic acid dianhydride having the ester group by reacting acid chloride of trimellitic anhydride with an aromatic dihydroxy compound in the presence of a base uses acetonitrile as a reaction solvent. As a result, water-washing operation for removing by-produced hydrochloride becomes unnecessary, and a treating operation for returning a hydrolyzed product to the original becomes also unnecessary. Consequently, an impurity inhibiting the high purification is not formed. The aromatic carboxylic acid dianhydride free from such the impurity is suitable as a polymerization raw material because the impurity becomes an inhibiting factor for the polymerization reaction when using the aromatic carboxylic acid dianhydride as the polymerization raw material.

Abstract translation: 要解决的问题：提供一种经济有效地制备具有酯基的高纯度芳香族羧酸二酐的方法。溶液：通过使偏苯三酸酐的酰氯与丙烯酸酐反应生成具有酯基的芳族羧酸二酐的方法 芳基二羟基化合物在碱的存在下使用乙腈作为反应溶剂。 结果，不需要用于除去副产物的盐酸盐的水洗操作，并且也不需要将水解产物返回到原料的处理操作。 因此，不形成抑制高纯化的杂质。 不含这种杂质的芳族羧酸二酐适合作为聚合原料，因为当使用芳族羧酸二酐作为聚合原料时杂质成为聚合反应的抑制因子。