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The 17th National Pesticide Exchange Conference and Agrochemical Products

Release time:2019-09-30 11:13:47


Microreactor, also known as microchannel reactor, is a general term for a series of micro-chemical equipment such as micro-mixers, micro-heat exchangers, microcontrollers, micro-extractors, and micro-chemical analysis. It is a feature size manufactured by precision machining technology. 3D structural components between 10 and 1000 microns, process fluid channels at the micron level, can be used for chemical reactions including heat transfer, mixing, separation, analysis and control, etc. in chemical, chemical, fine chemical, pharmaceutical, biochemical, etc. The field is widely used.
There are many types of microreactors. According to the operation mode, they can be divided into continuous microreactors, semi-continuous microreactors and batch microreactors. According to the reaction phase, they can be divided into gas-solid phase catalytic microreactors and gas-liquid phase microreactions. , liquid phase microreactor and gas-liquid solid phase microreactor. The microreactor has a variety of geometric structures, the simplest is the tubular structure, as well as the plate structure, microchannel structure and integrated structure of integrated reagent injection, mixing, heat exchange, solvent exchange, phase separation and other functions. . Microreactors are available in a wide variety of materials, including glass, silicon, ceramics, metals, and polymers. Select the appropriate materials for the temperature, pressure, corrosivity, and specific heat capacity of the chemical reaction.
The research work of microreactor technology mainly focuses on three aspects: First, the upgrading of traditional chemical technology, mainly concentrated in the fields of petrochemicals, medicines, pesticides, dyes, explosives, etc., mainly including sulfonation, nitrification, direct fluorination, Oxidation, peroxidation, amidation, diazotization and other types of strong exothermic and flammable and explosive gas-liquid and liquid-liquid reaction processes. The second is the research work in the field of national security, mainly involving the miniaturization of chemical lasers, the efficient treatment of nuclear fuels, and the safe production of special materials. The third is the field of nanomaterial synthesis, especially the batch, low-efficiency synthesis process of fine chemicals, pharmaceuticals and chemicals can be changed into a continuous process like petrochemical, which reduces the reaction time from several hours to tens of seconds. .
Microreactor technology will bring major changes to the chemical industry. First, the production efficiency can be significantly improved. Secondly, the safety of the production process will continue to increase, and then the stability of product quality will be improved. To sum up, it is to make chemical production more efficient, safer, more environmentally friendly, and more cost-effective. This is the goal of sustainable development that the chemical industry is striving for.
How high can the productivity of microreactor technology be mentioned? Ma Bing, general manager of Shanghai Huihe Huade Biotechnology Co., Ltd. said: "With a microreactor, the reaction rate can be more than 100 times that of a conventional reactor, and the heat exchange rate is 1000 times that of a conventional device. A violent exothermic reaction, if In the traditional reactor, it is necessary to add the material very slowly, the reaction may last for several or even dozens of hours, and with the microreactor, the reaction time can be shortened to a few minutes or even a few seconds. About 20% of the reaction can be achieved by microreactor technology."