Production process of potassium carbonate

Abstract

The invention relates to a potassic carbonate, in particular to a technique for producing potassium carbonate. The method comprises the following steps: evaporating a mixed solution at a low temperature and pressure after the ion exchange process is performed to ammonium hydrogen carbonate and potassium chloride so that only a small amount of potassium bicarbonate is converted to potassium carbonate. Therefore, CO2 given out by decomposing ammonium hydrogen carbonate in the pressure reducing and evaporating process can realize the carbonization of the potassium carbonate, thereby the carbonization process is saved, the low temperature self-carbonizing production technique is realized, the energy consumption is reduced, the coal consumption is reduced to 1.3 tons from 1.8 tons in the traditional technique, the electricity consumption is reduced to 270KW / h from 450KW / h, the consumption of the main materials of the potassium chloride and the ammonium hydrogen carbonate per ton are reduced to 1.153 and 1.335 tons from 1.25 and 1.60 tons respectively, and the corrosion of the equipment is reduced.

Description

technical field [0001] The invention relates to a potassium carbonate, in particular to a production process of potassium carbonate. Background technique [0002] Currently, the production of potassium carbonate (K 2 CO 3 ) methods mainly include electrolysis and ion exchange resin method. Although the products prepared by the electrolysis method are of high quality and pollution-free, the equipment requirements are high, the power consumption is large, and the cost is high. The Chinese invention patent application with the publication number CN1092379 provides a process and equipment for preparing potassium carbonate. The powder or grinding material in the potassium carbonate calcined product or hydrate preparation device is added to the wet segregated salt after crystallization and solid separation and mixed. Stirrers with or without mixture circulation are installed between the solids classification of the separated salts and the inlet of the calcined and hydrate prepa...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly provides a potassium carbonate production process with low energy consumption, saves the carbonization process, has little corrosion to equipment, and has simple process steps; solves the technical problems of high energy consumption and many processes in the prior art

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