Reaction apparatus for preparing polyoxymethylene dimethyl ether

Abstract

The present invention discloses a reaction apparatus for preparing polyoxymethylene dimethyl ether. The reaction apparatus comprises a reaction column, an overhead condenser, a bottom reboiler and a liquid external circulation system. The reaction column is divided into an upper reaction section and a lower concentration section; the reaction section is packed with a solid acid catalyst; a separation tray or packing is arranged in the concentration section; a main raw material inlet, a circulating fluid outlet and at least one circulating fluid return port are arranged on the sidewall of the reaction column and corresponding to the upper section; the circulating liquid outlet is communicated with the circulating fluid return port by a circulating pipe; a circulating pump is arranged on the circulating pipe; and a second raw material inlet and at least one side line product outlet are arranged on the side wall of the reaction column and corresponding to the lower concentration section. The reaction apparatus maximizes the advantages of catalytic distillation technology, reaches raw material conversion per pass of close to 100% and simple separation of reaction byproducts and impurities of components, and lowers investment and energy consumption.

Description

technical field [0001] The invention relates to a reaction equipment for preparing polyoxymethylene dimethyl ether, which belongs to the field of chemical production equipment. Background technique [0002] my country's resource endowment of "rich coal, poor oil, and little gas" determines the country's industrial policy of vigorously supporting and developing clean coal chemical industry and its downstream products. The continuous development of the economy, the continuous increase in the number of cars and the ensuing smog weather have made the whole society pay more attention to the domestic energy situation, and the demand for the supply of clean oil products and the improvement of the environment has become stronger. At the same time, The tens of millions of tons of methanol production capacity produced by the prosperous development of coal chemical industry urgently needs to develop new downstream utilization methods, and polyoxymethylene dimethyl ether uses methanol a...

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Problems solved by technology

[0006] In view of the above-mentioned problems or defects, the present invention provides a reaction equipment for preparing polyoxymethylene dimethyl ether, which solves the problems of small production capacity, poor operation stability, catalyst wear, reaction heat and other common problems in the current reactor form. It solves the shortcomings of difficult removal and single function, and at the same time solves the problems of lengthy process flow, large equipment investment, low conversion rate of raw materials per pass and high energy consumption caused by the use of existing reactors

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