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Method for preparing biological potassium fertilizer from plant ash

A technology of biological potassium fertilizer and plant ash, which is applied in the direction of potassium fertilizer, application, inorganic fertilizer, etc., can solve the problems of environmental pollution, low extraction efficiency of potassium salt, increased cost, etc., and achieve high extraction efficiency, simple and easy operation, and simple and easy process The effect of the operation

Inactive Publication Date: 2017-11-24
BIOLAND ENVIRONMENTAL TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if the above-mentioned various methods are used to extract the potassium salt in the plant ash, it will not only increase the cost, but also cause pollution to the environment, and the extraction efficiency of the potassium salt is relatively low

Method used

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  • Method for preparing biological potassium fertilizer from plant ash
  • Method for preparing biological potassium fertilizer from plant ash
  • Method for preparing biological potassium fertilizer from plant ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step 1, under the condition of mechanical stirring, add plant ash to ultrapure water to obtain a mixed solution; wherein, the mass ratio of plant ash to ultrapure water is 1:4;

[0044] Step 2, subsequently, the mixed solution is placed at a reaction temperature of 25 degrees Celsius and stirred for 0.2 hours to obtain a mixed solution of plant ash and water; use a vacuum filtration device to perform suction filtration and separation under the condition of a vacuum of 0.85Mpa to obtain a filtrate and a filter cake ;

[0045] In step 3, the filter cake is repeatedly leached twice with ultrapure water, and the leaching solution is combined with the filtrate obtained in step 2 to finally obtain the leaching solution containing potassium salt;

[0046] In step 4, the leaching solution containing potassium salt obtained in step 3 is evaporated and crystallized to obtain the crude product of potassium sulfate, the crude product of potassium chloride and the crude product of pot...

Embodiment 2

[0056] Step 1, under the condition of mechanical stirring, add plant ash to ultrapure water to obtain a mixed solution; wherein, the mass ratio of plant ash to ultrapure water is 1:2;

[0057] Step 2, subsequently, the mixed solution is placed at a reaction temperature of 55 degrees Celsius and stirred for 2 hours to obtain a mixed solution of plant ash and water; use a vacuum filtration device to perform suction filtration and separation under the condition of a vacuum of 0.90Mpa to obtain a filtrate and a filter cake ;

[0058] In step 3, the filter cake is repeatedly leached twice with ultrapure water, and the leaching solution is combined with the filtrate obtained in step 2 to finally obtain the leaching solution containing potassium salt;

[0059] In step 4, the leaching solution containing potassium salt obtained in step 3 is evaporated and crystallized to obtain the crude product of potassium sulfate, the crude product of potassium chloride and the crude product of pot...

Embodiment 3

[0069] Step 1, under the condition of mechanical stirring, add plant ash to ultrapure water to obtain a mixed solution; wherein, the mass ratio of plant ash to ultrapure water is 1:3;

[0070] Step 2, subsequently, the mixed solution is placed at a reaction temperature of 85 degrees Celsius and stirred for 1 hour to obtain a mixed solution of plant ash and water; use a vacuum filtration device to perform suction filtration and separation under the condition of a vacuum of 0.95Mpa to obtain a filtrate and a filter cake ;

[0071] In step 3, the filter cake is repeatedly leached twice with ultrapure water, and the leaching solution is combined with the filtrate obtained in step 2 to finally obtain the leaching solution containing potassium salt;

[0072] In step 4, the leaching solution containing potassium salt obtained in step 3 is evaporated and crystallized to obtain the crude product of potassium sulfate, the crude product of potassium chloride and the crude product of pota...

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Abstract

The invention provides a method for preparing a biological potassium fertilizer from plant ash. The method comprises the following steps: under a mechanical stirring condition, adding the plant ash into ultrapure water to obtain a mixed solution; stirring the mixed solution for 0.2-2 hours at the reaction temperature of 25-85 DEG C to obtain the mixed solution of the plant ash and water; under the condition that the vacuum degree is 0.85-0.95Mpa, performing suction filtration separation by using a vacuum suction filtration device to obtain a filtrate and a filter cake; performing evaporative crystallization on a potassium salt-containing leaching solution to obtain a crude potassium sulfate product, a crude potassium chloride product and a crude potassium carbonate product respectively, and then refining the crude products. The method has the advantages as follows: (1) in the method, water is used as an extractant, and water can be recycled, so that the method is energy-saving and environment-friendly and no sludge is produced; (2) the plant ash is used as a raw material, and the raw material is rich, pollution-free, cheap and easy to obtain, so that the method is suitable for large-batch low-cost preparation of the potassium fertilizer, is not only suitable for large-scale industrial production, but also can be easily applied commercially.

Description

technical field [0001] The invention belongs to the technical field of effective utilization of plant ash, and in particular relates to a method for preparing biological potassium fertilizer by using plant ash. Background technique [0002] Plant ash is a complex mixture, rich in potassium carbonate, potassium sulfate and potassium chloride, and contains trace elements such as phosphorus, calcium, magnesium and zinc. It is of great significance to extract potassium from plant ash for utilization. Currently reported potassium extraction techniques mainly include ion exchange, solvent extraction, electrodialysis, and chemical precipitation. Yet above-mentioned various methods all propose for the situation that the soluble potassium content in seawater, potassium ore is relatively low, and contained inorganic salt is complicated, and about 90% of potassium salt in plant ash is soluble in water, and with carbonic acid Potassium, potassium sulfate and potassium chloride are main...

Claims

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Application Information

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IPC IPC(8): C05D1/00C05D1/02
CPCC05D1/00C05D1/02
Inventor 施军营李杰邵田羽乔如林薛方亮田倩
Owner BIOLAND ENVIRONMENTAL TECH GRP CORP
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