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11. 发明申请

US20090048471A1 Production Process of 1,6-Hexanediol 有权
标题翻译： 1,6-己二醇的生产工艺
公开(公告)号：US20090048471A1
公开(公告)日：2009-02-19
申请号：US12087422
申请日：2007-01-12
申请人： Hirofumi Ii , Tomoyuki Ito , Yoshiki Kawamura , Toshiyuki Matsushita
发明人： Hirofumi Ii , Tomoyuki Ito , Yoshiki Kawamura , Toshiyuki Matsushita
IPC分类号： C07C29/48
CPC分类号： C07C29/149 , C07C29/80 , C07C67/03 , C07C67/08 , C07C69/675 , C07C69/44 , C07C31/20
摘要： A method is provided for obtaining highly pure 1,6-hexanediol in which the contents of impurities such as 1,4-cyclohexanediol, 1,5-hexanediol, 1,2-cyclohexanediol, 1,7-pentanediol, 1,5-pentanediol and high boiling point components are significantly reduced.This process for producing 1,6-hexanediol from cyclohexane comprises the steps of: (1) treating an aqueous extraction concentrate of a reaction mixture obtained by oxidation of cyclohexane with a lower alcohol to esterify monocarboxylic acids and dicarboxylic acids contained in the extract, and simultaneously remove and separate by distillation water, excess lower alcohols and carboxylic acid esters; (2) converting oligomer esters contained in the bottom liquid to carboxylic acid esters by depolymerizing the oligomer esters at a high temperature and high pressure in the presence of a lower alcohol and a catalyst; and (3) hydrogenating the carboxylic acid esters distilled off in the step (1) and the carboxylic acid esters obtained in the step (2) either respectively or collectively to convert to 1,6-hexanediol.
摘要翻译：提供了一种获得高纯度1,6-己二醇的方法，其中杂质含量如1,4-环己二醇，1,5-己二醇，1,2-环己二醇，1,7-戊二醇，1,5-戊二醇高沸点成分显着降低。用于从环己烷生产1,6-己二醇的方法包括以下步骤：（1）通过用低级醇氧化环己烷得到的反应混合物的水提取浓缩物，以酯化提取物中所含的一元羧酸和二羧酸，同时通过蒸馏水，过量的低级醇和羧酸酯去除和分离; （2）通过在低级醇和催化剂的存在下在高温高压下使低聚物酯解聚，将底部液体中所含的低聚物酯转化为羧酸酯; 和（3）分别或共同地氢化步骤（1）中蒸馏的羧酸酯和步骤（2）中获得的羧酸酯以转化为1,6-己二醇。

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