Continuous preparation method of trinitromalonaldehydic acid dipotassium salt

Abstract

The invention discloses a continuous preparation method of a trinitromalonaldehydic acid dipotassium salt. The continuous preparation method comprises the following steps of: conveying the alcoholic solution of mucobromic acid or mucochloric acid and a nitrating agent solution in parallel by using continuous conveying equipment and completing a reaction in a continuous reactor or a pipeline, performing ultrasonic dispersion treatment in the material conveying process, and carrying out the treatment processes such as solid-liquid separation, washing and drying on the generated product, thus obtaining the trinitromalonaldehydic acid dipotassium salt. Solvent distillation recovery is performed on the separated reaction mother liquor and thewashing liquid, and the distilled mother liquor is crystallized so that the by-product potassium bromide or potassium chloride can be separated out. The method is capable of improving the reaction efficiency, reducing the online handling capacity of materials and reducing or eliminating potential safety hazards probably caused by reaction heat release in the intermittent reaction process. Besides, the byproduct can be separated and utilized effectively; therefore, pollution on the environment can be avoided.

Description

technical field [0001] The invention belongs to the synthesis technology of organic compounds, in particular to a preparation method of dipotassium trinitropropanalate. Background technique [0002] In recent years, increasing the energy density of solid propellants and improving their environmental performance has become a research hotspot in the world. Dipotassium trinitropropionic acid is an important intermediate in the synthesis of energetic materials, and it can improve the synthesis efficiency of this compound. And process safety is very necessary. The traditional synthesis process is carried out by batch process. Since a large amount of heat is released during the synthesis reaction of this compound, the material needs to be cooled to a lower temperature before the reaction. If the reaction temperature is out of control, the risk of explosion in the equipment system is relatively high. Large, especially when the amount of materials in process is large during industr...

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Problems solved by technology

So far, there is no bibliographical report on the preparation of this compound by the relevant continuous reaction method

In addition, a large amount of waste liquid will be produced in the process of preparing dipotassium trinitropropionaldehyde by traditional batch synthesis process, which not only pollutes the environment, but also may bring potential safety hazards

At present, there is no bibliographical report about the synthesis by-products and waste liquid recovery treatment of dipotassium trinitropropionylate

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