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Process for separating and recovering potash element form Eichhornic crassipes plant

A technology of water hyacinth, plant, applied in the field of extracting potassium

Inactive Publication Date: 2005-01-05
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to literature survey results, valuable metals such as Ag (Water Sci.Technol., 1987, Vol.19 (10), Utilization of water hyacinth for removal and recovery of silver from industrial wastewater) are recovered from water hyacinth plants by chemical separation method, However, the chemical separation method is used to separate and reclaim the potassium in the water hyacinth plant, so far it is still a blank at home and abroad.

Method used

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  • Process for separating and recovering potash element form Eichhornic crassipes plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 100kg of fresh hyacinth hyacinth plants with a water content of 90% after draining, add 2000ml of 8mol / L hydrochloric acid solution, mash with a plant homogenizer and extract (reciprocating oscillation) for half an hour, squeeze with a plate and frame filter press Take out the soaking solution, about 9000ml, leave it overnight, and the plant residue after squeezing the soaking solution has a water content of 50%. Add 10 liters of 12% potassium carbonate solution to neutralize the acidity and precipitate part of calcium and magnesium to the extracted extract obtained by extrusion and separation, filter the precipitate, remove pigment and water-soluble organic matter with a packed tower equipped with activated carbon, and use a packed tower at the bottom of the used Filled with glass wool, the height of the packed layer is 1 / 10 of the column height, the length-to-diameter ratio of the adsorption column is 10, and the activated carbon particles with a particle size of ...

Embodiment 2

[0022] Take 100kg of fresh hyacinth hyacinth plants with a water content of 90% after draining, add 2500ml of 6mol / L hydrochloric acid solution, mash with a plant homogenizer and extract (reciprocating oscillation) for half an hour, squeeze with a plate and frame filter press Take out the soaking solution, about 9000ml, leave it overnight, and the plant residue after squeezing the soaking solution has a water content of 50%. Add 10 liters of 12% potassium carbonate solution to neutralize the acidity and precipitate part of calcium and magnesium to the extracted extract obtained by extrusion and separation, filter the precipitate, remove pigment and water-soluble organic matter with a packed tower equipped with activated carbon, and use a packed tower at the bottom of the used Filled with glass wool, the height of the packed layer is 1 / 10 of the column height, the length-to-diameter ratio of the adsorption column is 10, and the activated carbon particles with a particle size of ...

Embodiment 3

[0024] Take 100kg of fresh hyacinth hyacinth plants with a water content of 90% after draining, add 2000ml of 6mol / L hydrochloric acid solution, mash with a plant homogenizer and extract (reciprocating oscillation) for half an hour, squeeze with a plate and frame filter press Take out the soaking solution, about 9000ml, leave it overnight, and the plant residue after squeezing the soaking solution has a water content of 50%. Add 10 liters of 12% potassium carbonate solution to neutralize the acidity and precipitate part of calcium and magnesium to the extracted extract obtained by extrusion and separation, filter the precipitate, remove pigment and water-soluble organic matter with a packed tower equipped with activated carbon, and use a packed tower at the bottom of the used Filled with glass wool, the height of the packed layer is 1 / 10 of the column height, the length-to-diameter ratio of the adsorption column is 10, and the activated carbon particles with a particle size of ...

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Abstract

The invention discloses a method of separating and recovering potassium element from Eichhornia crassipes Solm, namely water hyacinth. Its characteristic: extracting the fresh Eichhornia crassipes Solm by proper-concentration hydrochloric acid, extruding and separating resiudes to obtain extract; adding in potassium carbonate solution, filtering out the deposit, passing the filtrate through a filling tower; passing the clear liquor through an cation exchange resin to exchang most potassium on a column; washing the potassium on the colum by lower-concentration hydrochloric acid, adding in solid potassium carbonate, neutralizing the effluent liquid, finally adding in a precipitator tartaric acid solution, depositing potassium in the effulent liquid, dehydrating the deposit and drying to obtain the finised potassium hydrogen tartrate, which is a raw material needed by food industry and pharmaceutical industry. The invention is a new way of controlling environmental pollution and resources recovery.

Description

technical field [0001] The invention belongs to a method for extracting potassium from plants, in particular to a method for separating and recovering potassium from water hyacinth, an aquatic plant, and the potassium product can be used in the food industry and pharmaceutical industry. technical background [0002] In recent years, water hyacinth (English name Water hyacinth, Eichhomia crassipes), which belongs to the genus Hyacinthaceae, is native to South America and is a perennial aquatic species that grows rapidly in waters all over the world. Plants, especially in some eutrophic waters, the propagation speed of this plant is quite amazing, so that it forms a prominent problem in the environmental management of waters today (seeing the Chinese invention patent application publication, application number: 03104097.7). In recent years, water hyacinth has rapidly multiplied in rivers and lakes in southern my country. Due to inadequate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C51/42C07C59/255
Inventor 朱端卫周文兵刘大会米玮婕汪明霞
Owner HUAZHONG AGRI UNIV
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