CO2 mineralization method for co-producing potassium-rich solution
A solution and potassium-enriched technology, applied in chemical instruments and methods, separation methods, potash fertilizers, etc., can solve the problems of high energy consumption and no industrial production, and achieve the effect of solving the problem of CO2 emission reduction and the shortage of potash fertilizer production resources
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Embodiment 1
[0026] The technical process of this embodiment is as attached figure 1 shown. The ore rich in feldspar is crushed and ball-milled until the particle size is less than 200 mesh powder, and 50g of crushed ore powder is added to a 2000ml intermittent high-pressure reactor, and 1000ml of calcium chloride solution is added, and the concentration of the calcium chloride solution is 0.5mol / L, seal the reactor, raise the temperature to 180°C, and feed CO 2 , until the pressure in the reactor rises to 5MPa, start the stirrer, adjust the stirring rate to 500r / min, react for about 300min, and stop the reaction. After cooling the autoclave to normal temperature and releasing the pressure to an atmospheric pressure, the autoclave was opened, and the product was filtered to obtain 2A solid of calcium carbonate, the mineralization product, and a liquid phase solution rich in potassium ions. In this process, the extraction rate of potassium can reach 6%.
Embodiment 2
[0028] The technical process of this embodiment is also as attached figure 1 shown. The ore rich in sanidine is crushed and ball-milled until the particle size is less than 100 mesh powder, and 100g of crushed ore powder is added to a 2000mi batch high-pressure reactor, and 1000ml of calcium chloride solution is added, and the concentration of the calcium chloride solution is 4mol / L, seal the reactor, raise the temperature to about 300°C, and inject CO 2 , until the pressure in the reactor rises to 3MPa, start the stirrer, adjust the stirring rate to 800r / min, react for about 120min, and stop the reaction. After cooling the autoclave to normal temperature and releasing the pressure to an atmospheric pressure, the autoclave was opened, and the product was filtered to obtain 2 A solid of calcium carbonate, the mineralization product, and a liquid phase solution rich in potassium ions. In this process, the extraction rate of potassium can reach 9%.
Embodiment 3
[0030] The technical process of this embodiment is as attached figure 2 shown. The ore rich in microplagioclase is crushed and ball-milled until the particle size is less than 200 mesh, and 50g of the crushed ore powder is taken, activated at 500°C for about 5 hours under the protection of nitrogen, and then placed in a 2000ml batch high-pressure reactor Add 1000ml of calcium chloride solution, the concentration of the calcium chloride solution is 2mol / L, seal the reactor, heat up to about 200°C, and pass in CO 2 , until the pressure in the reactor rises to 10MPa, start the stirrer, adjust the stirring rate to 500r / min, react for 180min, and stop the reaction. After cooling the autoclave to normal temperature and releasing the pressure to an atmospheric pressure, the autoclave was opened, and the product was filtered to obtain 2 A solid of calcium carbonate, the mineralization product, and a liquid phase solution rich in potassium ions. In this process, the extraction rate...
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