Continuous preparation system and method of cyclododecanone solution oxime

Abstract

The invention provides a continuous preparation system and method of cyclododecanone solution oxime. In the system, reaction raw materials cyclododecanone solution and hydroxylamine salt are integrally countercurrent, and the cyclododecanone solution is kept excessive in the whole process, so that the cyclododecanone solution has the effects of both reactants and solvents. A two-stage supergravity reactor is coupled with a phase separator to reinforce an oximation reaction between oil and water, oxime and ketone in an oil phase are separated through rectification after the two-stage reaction, and the separated ketone and a small amount of byproduct imine flow back to a reaction liquid to further inhibit the occurrence of side reactions. According to the method, additional solvents can be omitted, generation of a byproduct imine is effectively avoided, and the utilization rate of raw materials is increased; and through the coupling design of the supergravity reactor and the phase separator, the total production time is remarkably shortened, and the occupied area of the device is reduced.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for efficient separation of chemicals from wastewater streams without adding any extra substances that could be harmful or even dangerous if released into nature' s environment. It uses special equipment called double stages with different levels of gravity to create an enclosed space where certain compounds form complexes while others remain dissolved. By doing this, it simplifies the purification processes needed to dispose of these materials back into natural resources like water. Overall, this new technique helps reduce environmental concerns associated with disposal of industrial products containing potentially hazardous components.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency of producing cyclopropyldiphenoxy propane-2-carboxaldehydes with high purity from alkali metal salts such as sodium chloroformate solutions containing residual amounts of impurities like iron ion.

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