Technique producing potassium muriate by using potassium mixed salt and aged halogen produced by vitriolate type bittern
A sulfate type, potassium mixed salt technology, applied in the direction of alkali metal chloride, etc., to achieve the effects of unlimited production scale, low energy consumption, and less investment
Inactive Publication Date: 2009-07-22
陈兆华 +1
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Problems solved by technology
[0003] The main components of sulfate type brine are KCl, NaCl, MgSO 4 , MgCl 2 , the produced potassium mixed salt is all used as the production of potassium sulfate or potassium magnesium sulfate fertilizer (soft langbeinite) at home and abroad, but it is raw material to produce potassium chloride with potassium mixed salt, there is no report at home and abroad
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Embodiment 1
[0047] Take 2700g of old brine (see Table 1-1 for composition), heat it to boiling (115°C, note: test done on the Qinghai Plateau), add 1000g of potassium mixed salt while stirring (see Table 1-2 for composition), and stir Heat the slurry at a constant temperature of 110°C, let the slurry transform at a high temperature for 40 minutes, stop stirring, settle the slurry at a constant temperature of 105°C for 1 hour, take out the slurry, and separate the solid and liquid rapidly to obtain 2930 g of supernatant liquid, (see Table 1- 3), 490g of isolated salt was obtained (see Table 1-4 for the composition), and 280g of water was lost during the high-temperature conversion process. The supernatant liquid was naturally cooled to 25°C, and carnallite was precipitated from the supernatant liquid. After solid-liquid separation, Obtain 536g of low-sodium high-grade carnallite (see Table 1-5 for the composition), and 2397g of old brine (see Table 1-6 for the composition of the old brine),...
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Abstract
The invention discloses a process for producing potassium chloride by using potassium mixed salt and old brine produced from sulfate-type brine. The potassium mixed salt and old brine are subjected to high-temperature conversion; the high-temperature converted slurry is subjected to solid-liquid separation to obtain clear liquid; cool the clear liquid to crystallize carnallite; decompose and wash the carnallite to obtain the product potassium chloride. The present invention can adapt to potassium mixed salts of different qualities produced by sulfate-type brine, thereby solving the problem that potassium mixed salts cannot produce potassium chloride at present at home and abroad. It has strong adaptability to raw materials, high acquisition rate, and equipment Mature, less investment, low energy consumption, large controllable range of production process parameters, easy operation, unlimited production scale and other advantages, providing a new way for my country's potash fertilizer production.
Description
technical field [0001] The invention belongs to the field of inorganic salt industry, and in particular relates to a production process for preparing potassium chloride by using potassium mixed salt produced from sulfate-type brine as raw material. Background technique [0002] At present, the main method of producing potassium chloride in the domestic inorganic salt industry is: use brine after sea salt production as raw material and use brine evaporation method, use salt lake natural carnallite, regenerated carnallite and potassium halite as raw material, mainly use Flotation method, reverse flotation method, thermal solution crystallization method, decomposition and separation method, etc., all the above methods have one thing in common, that is, use carnallite or potassium halite as raw material, and then according to the composition of carnallite and potassium halite , and different production processes are used to prepare potassium chloride. [0003] The main componen...
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IPC IPC(8): C01D3/04C01D3/06
Inventor 陈兆华
Owner 陈兆华