专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4663477A Process for the hydrolysis of dialkyl carbonates 失效
标题翻译：水解碳酸二烷基酯的方法
公开(公告)号：US4663477A
公开(公告)日：1987-05-05
申请号：US844895
申请日：1986-03-27
申请人： John W. Crandall , James E. Deitzler , Louis A. Kapicak , Fedor Poppelsdorf
发明人： John W. Crandall , James E. Deitzler , Louis A. Kapicak , Fedor Poppelsdorf
IPC分类号： C07C69/36 , C07C29/09 , C07C29/147 , C07C31/04 , C07C67/36 , C07C67/48 , C07C67/60 , C07C69/96
CPC分类号： C07C29/095
摘要： A process is provided for the utilization of dialkyl carbonates formed as by-products in a continuous process for the synthesis of oxalic acid esters from nitrous acid esters and carbon monoxide and wherein the esters are subsequently used as intermediates in the production of commercially useful products, such as ethylene glycol. The process comprises contacting a mixture containing the by-product comprised of a dialkyl carbonate with an aqueous solution of a metal carbonate under hydrolyzing conditions whereby the dialkyl carbonate is converted to the corresponding alkanol and the metal carbonate is converted to metal bicarbonate. Upon distillation of the alkanol from the mixture the bicarbonate is converted back to the metal carbonate which can then be recycled from the bottoms to the hydrolyzing zone for use in further hydrolysis of by-product. The alkanol is recycled for use in the continuous process.
摘要翻译：提供了一种方法，用于利用在连续方法中形成副产物的二烷基碳酸酯，用于从亚硝酸酯和一氧化碳合成草酸酯，并且其中酯随后用作生产商业上有用的产品的中间体，如乙二醇。该方法包括在水解条件下使包含碳酸二烷基酯的副产物与金属碳酸盐水溶液的混合物接触，由此将碳酸二烷基酯转化为相应的链烷醇并将金属碳酸盐转化为金属碳酸氢盐。在从混合物中蒸馏出链烷醇时，碳酸氢盐转化回到金属碳酸盐，然后可将其从塔底产物再循环到水解区，用于副产物的进一步水解。链烷醇被再循环用于连续过程。

IPRDB

热门服务

关于我们

友情链接

联系方式