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1. 发明授权

US5880310A Process for producing plasticizer esters 失效
标题翻译：生产增塑剂酯的方法
公开(公告)号：US5880310A
公开(公告)日：1999-03-09
申请号：US65233
申请日：1998-04-23
申请人： Kuniaki Ageishi , Tadayoshi Takefumi , Tsutomu Numoto , Tsuguji Kawabata , Etsuo Urabe
发明人： Kuniaki Ageishi , Tadayoshi Takefumi , Tsutomu Numoto , Tsuguji Kawabata , Etsuo Urabe
IPC分类号： C07C67/08 , C07C67/48
CPC分类号： C07C67/08
摘要： Provided is a process for producing a plasticizer ester characterized by previously removing dissolved oxygen in a starting alcohol, and then subjecting an organic acid or its anhydride and the alcohol to an esterification reaction in the presence of an organic metal compound catalyst, which process can substantially reduce formation of coloring impurities and can easily provide a plasticizer ester having a low degree of coloring.Further, a plasticizer ester having a high volume resistivity can easily be obtained by adding an alkaline aqueous solution to a reaction product obtained by an esterification reaction to conduct neutralization of an unreacted acid and hydrolysis of the catalyst, further blowing a carbon dioxide gas to convert the residual alkali into a carbonate, recovering an excess alcohol, and then conducting purification through finefiltration using a filter aid or further in combination with adsorption treatment.
摘要翻译：提供一种生产增塑剂的方法，其特征在于预先除去起始醇中的溶解氧，然后在有机金属化合物催化剂存在下使有机酸或其酸酐和醇进行酯化反应，该方法基本上减少着色杂质的形成，并且可以容易地提供着色程度低的增塑剂酯。此外，通过将碱性水溶液加入到通过酯化反应获得的反应产物中以导致未反应的酸的中和并水解催化剂，进一步吹入二氧化碳气体以进行转化，可以容易地获得具有高体积电阻率的增塑剂酯将残留的碱转化成碳酸盐，回收过量的醇，然后通过使用助滤剂进行微滤或进一步与吸附处理组合进行纯化。

2. 发明授权

US5948949A Process for producing 2,6-dimethylnaphthalene 失效
标题翻译：生产2,6-二甲基萘的方法
公开(公告)号：US5948949A
公开(公告)日：1999-09-07
申请号：US777078
申请日：1996-12-30
申请人： Makoto Takagawa , Ryusuke Shigematsu , Kuniaki Ageishi , Ko Kedo
发明人： Makoto Takagawa , Ryusuke Shigematsu , Kuniaki Ageishi , Ko Kedo
IPC分类号： C07C7/14 , C07C15/24 , C07C51/265 , C07C5/22
CPC分类号： C07C7/14 , C07C15/24 , C07C51/265
摘要： A process for producing highly pure 2,6-dimethylnaphthalene in a high yield from a mixture of dimethylnaphthalene isomers in the presence of a solvent, such as an aliphatic or alicyclic saturated hydrocarbon. Highly pure 2,6-dimethylnaphthalene can be produced steadily for a long time by filtering the 2,6-dimethylnaphthalene crystal precipitated by the crystallizing by using a filtration apparatus, such as a rotary vacuum filter, peeling-off the filtered cake from a filter cloth and cleaning the filter cloth with a solvent, at a temperature not lower than a filtration temperature.
摘要翻译：在溶剂例如脂族或脂环族饱和烃的存在下，从二甲基萘异构体的混合物中以高产率制备高纯度2,6-二甲基萘的方法。通过使用诸如旋转式真空过滤器的过滤装置过滤由结晶沉淀的2,6-二甲基萘结晶，可以长时间稳定地生产高纯度的2,6-二甲基萘，从过滤器中剥离滤饼在不低于过滤温度的温度下用溶剂清洗滤布。

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