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1. 发明授权

US5645696A Process for preparing unsaturated carboxylic acid esters and apparatus for preparing the same 失效
标题翻译：不饱和羧酸酯的制备方法及其制备方法
公开(公告)号：US5645696A
公开(公告)日：1997-07-08
申请号：US346191
申请日：1994-11-21
申请人： Boo Gon Woo , Kwang Ho Park , Hwa Myung Joo , Han Sun Lee
发明人： Boo Gon Woo , Kwang Ho Park , Hwa Myung Joo , Han Sun Lee
IPC分类号： B01J8/02 , B01J8/04 , B01J31/08 , C07C67/08 , C07C69/52 , C07C69/54 , B01D3/34
CPC分类号： B01J8/0496 , B01J8/0453 , C07C67/08 , B01J2208/00247 , B01J2208/00283 , Y02P20/582
摘要： The present invention relates to a process for continuously preparing unsaturated carboxylic acid esters by esterifying an (aliphatic) alcohol having 1 to 8 carbon atoms with an unsaturated carboxylic acid in the presence of a cation exchange resin catalyst, characterized in that the process is conducted by continuously circulating said reactants in contact with said catalyst from the top to the bottom through a reactor which is composed in the form of a fixed bed divided into 1 to 10 steps wherein each step comprises a catalyst bed, a filter and a air inlet, and has a thermal insulating outer wall, supplying a vaporizing heat for extraction of water, which is produced during the reaction, through a heat exchanger outside the reactor, circulating the reactants between the reactor and the heat exchanger by means of a circulating pump, contacting an azeotropic mixture of water vaporized by the heat exchanger and an alcohol with an alcohol circulating in a column tower or a raw alcohol supplied from an alcohol inlet located on the top of the column tower to recycle the high boiling component into the reactor and, at the same time, to transfer the light component to the upper part of the column in which the light component is condensed, separating the condensate into an organic layer and water in a decanter, and then recycling the organic layer into the reactor and removing the water produced during the reaction, and a novel apparatus for carrying out this process.
摘要翻译：本发明涉及在阳离子交换树脂催化剂存在下，通过用不饱和羧酸酯化具有1〜8个碳原子的（脂肪族）醇来连续制备不饱和羧酸酯的方法，其特征在于，该方法是通过将所述反应物与所述催化剂从顶部到底部连续循环通过以固定床形式分成1至10个步骤的反应器，其中每个步骤包括催化剂床，过滤器和进气口，以及具有绝热外壁，通过在反应器外部的热交换器提供在反应期间产生的用于萃取水的汽化热，借助于循环泵将反应物循环在反应器和热交换器之间，由热交换器蒸发的水的共沸混合物和在柱塔或粗酒精中循环的醇的醇从位于塔塔顶部的酒精入口引出，将高沸点组分循环到反应器中，同时将光组分转移到其中冷成分的塔的上部，分离将冷凝物倒入有机层中并在滗析器中加水，然后将有机层再循环到反应器中并除去反应期间产生的水，以及用于实施该方法的新型装置。

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