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公开(公告)号：US4663477A
公开(公告)日：1987-05-05
申请号：US844895
申请日：1986-03-27
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。
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公开(公告)号：US4629806A
公开(公告)日：1986-12-16
申请号：US239763
申请日：1981-03-12
申请人： Thomas C. Cleveland , James E. Deitzler , Arthur R. Doumaux, Jr. , Joseph P. Henry , John M. Hurt , Louis A. Kapicak , Bernard C. Ream
发明人： Thomas C. Cleveland , James E. Deitzler , Arthur R. Doumaux, Jr. , Joseph P. Henry , John M. Hurt , Louis A. Kapicak , Bernard C. Ream
IPC分类号： C07C67/36 , A61K20060101 , B01J23/00 , B01J23/44 , C01B20060101 , C07B61/00 , C07C69/36
CPC分类号： C07C69/36
摘要： A continuous vapor state process for the preparation of diesters of oxalic acid from a nitrogen oxide, an alcohol and carbon monoxide.
摘要翻译： 用于从氮氧化物，醇和一氧化碳制备草酸二酯的连续蒸气状态方法。
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