Method for improving chemical reaction speed in low-temperature condition

Abstract

The present invention relates to a microwave chemical reaction method in the field of basic chemistry, chemical reaction kinetics and chemicals, in particular to a method for increasing the chemical reaction speed under the low temperature. The present invention adopts an energy reverse ratio control method so as to increase the reaction speed, ensures rapid and continuous circulation of cooling medium to control the temperature of the reaction system lower than the safe temperature of the conventional thermochemical reaction, and at the same time provides the microwave radiation directly acted on reactant molecules so as to ensure the reactant to directly obtain the activated energy, greatly increase the ratio of the activated molecules in the reaction system and speed up the reaction speed. The present invention can rapidly activate the reactant molecules to participate in the effective crash and speed up the reaction speed; while speeding up the reaction, the system temperature can still maintain in the safe low-temperature state, thus not damaging the disordered heat of the reactant and target product molecule shape and the structure stability; at the same time, the thermal-sensitive side effects of chemical synthesis, extraction and other reactions are effectively reduced and even eliminated.

Description

technical field [0001] The present invention relates to basic chemical research, chemical reaction kinetics research and microwave chemical reaction methods in the field of chemical industry, in particular to microwave chemistry that can be used for organic synthesis, drug synthesis, nanomaterial synthesis, compound and unilateral traditional Chinese medicine and other natural product active ingredients extraction. Reaction method, especially relates to a method for increasing chemical reaction speed under low temperature conditions. Background technique [0002] In the traditional basic chemical research and chemical industry, chemical reactions are thermochemical systems that increase the temperature of the reaction system through energy conduction. In this thermochemical system, the temperature of the reaction system is related to the energy of the reactant molecules, that is, when the energy of the reactant molecules increases, the temperature of the reaction system will...

AI Technical Summary

Problems solved by technology

Although on this basis, some people have recently proposed a method of cooling the sample through the feeding system of the material in advance, and then feeding it into the microwave cavity for heating, or by increasing the contact surface between the reaction vessel and the cold air. Reaction temperature, but on the basis of ordinary microwave chemical reaction, microwave irradiation after pre-cooling the material cannot change the phenomenon of temperature rise and fluctuation of the reaction system under the action of microwave, and has not fundamentally solved this contradiction

Moreover, in this case, the stability of the reaction temperature process and microwave irradiation conditions is very poor, and it is impossible to quantify and reproduce

Because the microwave acts on the reaction system at the speed of light, the pre-cooled material instantly returns to the same normal temperature state as the initial state of the ordinary microwave reaction. The subsequent process is equivalent to the ordinary microwave reaction, and the microwave is still used to directly irradiate the reaction mixture. The reaction is carried out in the mode of increasing the temperature of the mixture by microwave power, and the heating method is not essentially different from the traditional heat conduction heating method.

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