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1. 发明授权

US5430184A Process for preparing 1,4-cyclohexandicarboxylic acid 失效
标题翻译：制备1,4-环己烷二羧酸的方法
公开(公告)号：US5430184A
公开(公告)日：1995-07-04
申请号：US169132
申请日：1993-12-17
申请人： Yoshiaki Tateno , Chihaya Sano , Kotone Tanaka , Mitsuo Magara , Naoki Okamoto , Kazuaki Kato
发明人： Yoshiaki Tateno , Chihaya Sano , Kotone Tanaka , Mitsuo Magara , Naoki Okamoto , Kazuaki Kato
IPC分类号： B01J23/44 , C07B61/00 , C07C51/36 , C07C51/43 , C07C51/44 , C07C61/09
CPC分类号： C07C51/36 , C07C51/44
摘要： An economic hydrogenation process is provided which significantly suppresses palladium catalyzer activity loss, for obtaining very high purity 1,4-CHDA through a simple operation. The process includes bringing the solution containing the hydrogenation reaction product of interest into contact with steam. The resultant products may include resins having excellent weather resistance or physical properties or high purity medical drugs. The process for preparing 1,4-cyclohexandicarboxylic acid is characterized by two consecutive steps. The first step includes the hydrogenation of a solution containing terephthalic acid in the presence of a palladium catalyzer in an acid resistant vessel or in a vessel layered with acid resistant material for preparing 1,4-cyclohexandicarboxylic acid. The second step includes contacting the solution containing 1,4-cyclohexandicarboxylic acid obtained in the first step with the steam, and extracting impurities moved to the steam.
摘要翻译：提供经济的氢化方法，其显着抑制钯催化剂活性损失，以通过简单的操作获得非常高纯度的1,4-CHDA。该方法包括将含有所需氢化反应产物的溶液与蒸汽接触。得到的产品可以包括具有优异的耐候性或物理性质的树脂或高纯度药物。制备1,4-环己烷二羧酸的方法的特征在于两个连续的步骤。第一步包括在耐酸容器中的钯催化剂存在下或在用耐酸材料层压制备1,4-环己烷二羧酸的容器中氢化包含对苯二甲酸的溶液。第二步包括使第一步骤中获得的含有1,4-环己烷二羧酸的溶液与蒸汽接触，并提取移入蒸汽中的杂质。

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