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2. 发明授权

US07211688B2 Process for the production of an alkenyl carboxylate or an alkyl carboxylate 失效
标题翻译：制备链烯基羧酸酯或羧酸烷基酯的方法
公开(公告)号：US07211688B2
公开(公告)日：2007-05-01
申请号：US10505660
申请日：2003-02-12
申请人： Robert William Clarke , Robert Croll , Andrew Richard Lucy , Bruce Leo Williams
发明人： Robert William Clarke , Robert Croll , Andrew Richard Lucy , Bruce Leo Williams
IPC分类号： C07C67/05 , C07C69/02 , C07C67/02 , C07C51/16
CPC分类号： C07C67/04 , C07C67/055 , Y02P20/125 , Y02P20/582 , C07C69/14 , C07C69/01 , C07C69/15
摘要： Process for producing an alkyl carboxylate, comprising contacting in an oxidation reaction zone a C2 to C4 alkane, a molecular oxygen-containing gas, the corresponding alkene and optionally water, in the presence of at least one catalyst active for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a first product stream comprising alkene, unreacted alkane, carboxylic acid and water; separating in a first separation means at least a portion of the product stream produced in the oxidation reaction zone into a gaseous stream comprising alkene and unreacted alkane and a liquid stream comprising carboxylic acid and water; and separating by chemical treatment at least a portion of the gaseous stream obtained from the first separation means into respective streams rich in alkene and alkane; wherein the chemical treatment comprises the steps of: (1) contacting the alkene/alkane gaseous stream with a solution of a metal salt capable of selectively chemically absorbing the alkene to produce a chemically absorbed alkene-rich liquid stream, and (2) recovering an alkene rich stream from the metal salt solution. In a second reaction zone, at least a portion of the alkene rich stream obtained from the second separation means and a corresponding carboxylic acid are contacted, in the presence of at least one catalyst active for the production of alkyl carboxylate, to produce a second product stream comprising alkyl carboxylate.
摘要翻译：制备羧酸烷基酯的方法，包括在氧化反应区中将C 2〜C 4烷烃，含分子氧的气体，相应的烯烃和任选的水接触，在至少一种催化剂存在下使烷烃氧化为相应的烯烃和羧酸的活性物质产生包含烯烃，未反应的烷烃，羧酸和水的第一产物流; 在第一分离装置中将在氧化反应区中产生的产物流的至少一部分分离成包含烯烃和未反应的烷烃的气流以及包含羧酸和水的液体流; 并通过化学处理将从第一分离装置获得的气流的至少一部分分离成富含烯烃和烷烃的各自的流; 其中所述化学处理包括以下步骤：（1）使烯烃/烷烃气流与能够选择性地化学吸收烯烃的金属盐的溶液接触以产生富吸收的富含烯烃的液体流，和（2）回收富含烯烃的金属盐溶液。在第二反应区中，在至少一种催化活性物质用于制备羧酸烷基酯的催化剂的存在下，将从第二分离装置获得的至少一部分富含烯烃物流和相应的羧酸接触以产生第二产物流包含羧酸烷基酯。

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