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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

Inactive Publication Date: 2013-02-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

China's water-soluble potassium ore resources are very few, accounting for only 0.29% of the world's resources, while non-water-soluble potassium ore resources are very rich, with a total of more than 2×10 10 , which are mainly potassium feldspar and mica. There have been many experiments in China to develop potassium feldspar to produce potash fertilizers, but there is no industrial production due to high energy consumption.

Method used

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  • CO2 mineralization method for co-producing potassium-rich solution
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Examples

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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, heat up 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 measured, 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 r...

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Abstract

Disclosed is a method for the joint production of a potassium-rich solution by mineralizing CO2, the method mainly comprising the following process steps: crushing ores rich in potassium feldspar into powder; placing the crushed ore powder into a reactor, adding a calcium chloride solution, and feeding in carbon dioxide gas; carrying out the mineralization reaction under the conditions of a temperature of 150°C-350°C and a partial pressure of carbon dioxide of not less than 1.0 MPa, mineralizing CO2 to generate calcium carbonate, and the potassium feldspar dissolving to generate a solution rich in potassium ions; and feeding the obtained slurry after fully reacting to a separating device for solid-liquid separation, the obtained solid phase being a solid containing the mineralization product of calcium carbonate and the liquid phase being a solution rich in potassium ions. The present invention jointly produces a potassium-rich solution during CO2 mineralization, breaks through the bottleneck of having low additional values of CO2 mineralization product and CO2 mineralization technology being difficult to implement in industry in the CO2 mineralization methods in the prior art, helps to solve the problem of CO2 emission reduction, and at the same time provides an adequate potassium source for potash fertilizer production.

Description

technical field [0001] The invention relates to a CO emission reduction method through mineralization 2 methods, particularly involving the mineralization of CO using potassium-rich feldspar ores and calcium chloride solutions 2 , A method for simultaneously producing a potassium-rich solution. Background technique [0002] carbon dioxide (CO 2 ) as a greenhouse gas is the main culprit of global warming. Due to the rapid development of industry, a large amount of energy is consumed, and the emission of carbon dioxide is also increasing. According to the report released by the International Energy Agency (IEA) in 2009, in 2007, the global carbon dioxide emission reached 29 billion tons, and China's carbon dioxide emission It is 6 billion tons, accounting for 21% of global emissions, and has surpassed the United States to become the world's largest energy-related carbon dioxide emitter. In recent years, extreme weather such as snow disasters, extreme heat, and rainstorms h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D1/00
CPCB01D2257/504B01D53/62Y02C10/04C05D1/00B01D2251/404C05D1/04B01D53/78B01D2251/306Y02C20/40Y02P20/151C05D3/02
Inventor 谢和平王昱飞刘建锋
Owner SICHUAN UNIV
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