A sleeve-type microchannel electrolytic reaction device and its application

Abstract

The present invention provides a casing type microchannel electrolysis reaction device and its application. The casing type microchannel electrolysis reaction device includes electrodes, feed pipes, discharge pipes and wiring piles; For the inner electrode in the outer tube electrode, the distance between the outer tube electrode and the inner electrode is 0.1-1mm; the outer tube electrode and the inner electrode are each independently selected from metal electrodes, carbon electrodes or conductive polymer electrodes , and at least one of them is a platinum-plated titanium electrode. The special design of the sleeve-type electrode realizes the fine and flexible adjustment of the electrode spacing, improves the current efficiency under the premise of ensuring the reaction conversion rate, makes the reaction conditions more mild and controllable, the reaction time is shorter, and reduces the waste of industrial waste. The production can fully meet the requirements of high efficiency, low energy consumption and environmental protection in the synthesis of organic compounds, and is especially suitable for the electrolytic preparation of substituted furan compounds or substituted pyrrole compounds.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction devices, and in particular relates to a casing type microchannel electrolytic reaction device and its application. Background technique [0002] 2,5-dimethoxy-2,5-dihydrofuran is an important fine chemical product. It is an intermediate in the synthesis of anticholinergic drugs atropine sulfate and anisodamine. It can be used in medical disinfectants and It can be used as a hardening agent for photosensitive materials; its direct hydrolysis can generate 2-hydroxy-1,4-butanedialdehyde, and it can be obtained by catalytic reduction with Raney nickel to obtain 2,5-dimethoxytetrahydrofuran, which can be obtained by hydrolysis after hydrogenation Succindialdehyde. Therefore, 2,5-dimethoxy-2,5-dihydrofuran plays an important role in the production of biomedicine, photosensitive materials and feed additives, and the development and optimization of its preparation process is an important resear...

AI Technical Summary

Problems solved by technology

The micro-electrolysis reaction device has good reaction efficiency and can reduce the dependence of the reaction on organic substances such as initiators; however, the current efficiency of the micro-electrolysis reaction device is low, and the reaction process depends on the catalyst of the foam structure, and the preparation cost still higher

[0006] CN106938991A discloses a method for preparing 2,5-dimethoxydihydrofuran. The method uses furan and methanol as raw materials, replaces elemental bromine with chlorine gas, uses sodium thiosulfate as active agent, and adopts pulse chlorine addition method Synthesize dimethoxydihydrofuran in one step with the electrolytic catalytic method in the electrolytic reaction bed, reduce the contact time of material, reduce side reaction to take place; But, the electrolytic reaction bed in this method adopts alternating current, and voltage is 5~10V, and current density is 5000~8000A / m 2 , the current efficiency is low, and the raw material contains chlorine gas, which is not conducive to environmental protection and safe industrial production

[0007] The electrolytic method for preparing 2,5-dimethoxydihydrofuran disclosed in the prior art still has the problems of low mass transfer efficiency, high energy consumption, and current efficiency. Catalysts and a large amount of electrolytes are used to ensure the production rate, so it brings a large burden on the treatment of three wastes, especially the burden of waste liquid treatment, which is not conducive to environmentally friendly industrial production

Images