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A method for separating and enriching rubidium from tailings containing rubidium

A technology for separation and enrichment and tailings, which is applied in the field of separation and enrichment of rubidium and potassium feldspar decomposition tailings leaching solution, can solve the difficulty of increasing the complexity of the purification process, separation, purification and product deep processing and other issues, to achieve the effect of reducing operating costs, simplifying production equipment and operation, and improving processing capacity

Inactive Publication Date: 2018-01-12
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, potassium and rubidium are very close in both physical and chemical properties, which brings great difficulties to the separation, purification and deep processing of rubidium products, and increases the complexity of rubidium extraction and purification processes.

Method used

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  • A method for separating and enriching rubidium from tailings containing rubidium

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Experimental program
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Effect test

Embodiment 1

[0025] Preparation of silica-loaded ammonium phosphomolybdate adsorbent: Weigh 5g of ammonium molybdate and dissolve it in 100mL of deionized water, stir and dissolve, slowly add 0.25mL of phosphoric acid with a mass concentration of 85%, heat to 80°C, and stir Add about 2mL of concentrated nitric acid with a mass concentration of 68% dropwise under conditions until the pH of the solution is 1. After a large amount of yellow precipitates are formed, add 18g of activated macroporous silica gel, stir for 1.5h, leave to stand for 10h and then filter with suction. Dry under vacuum at 80 °C for 6 h. The obtained solid was calcined in a muffle furnace at 200 °C for 4 h to obtain AMP-SiO 2 .

[0026] Take 200g of potassium feldspar decomposition tailings, add 500mL of 0.1mol / L dilute hydrochloric acid solution, leaching with ultrasonic vibration for 1.5h, filter and dilute to 1000mL to obtain acid leaching solution. Take AMP-SiO 2 10g is packed in an adsorption column with a heigh...

Embodiment 2

[0028] The process flow is basically the same as in Example 1, except that the adsorbent used is aluminum oxide-loaded ammonium phosphomolybdate. The adsorption rate and resolution rate were 62% and 97.5%, respectively.

[0029] The preparation process of the adsorbent is as follows: take 6.0 g of molybdenum trioxide and add it into a 150 mL Erlenmeyer flask, stir and dissolve until it becomes a milky white suspension. Heating to 115°C under magnetic stirring, the reactant reached boiling, during the heating process, 3mL of concentrated phosphoric acid was added dropwise to the Erlenmeyer flask, and the reactant gradually changed from milky white to golden yellow. Continue to heat and stir, and when the reactant turns from golden yellow to green, use 85% H 3 PO 4 Adjust the acidity and alkalinity of the solution to about pH=10, and keep the slight boiling reaction for 2.5h. Maintain liquid level. Cool to room temperature after completion of the reaction, and dropwise add m...

Embodiment 3

[0031] The process flow is basically the same as in Example 1, except that the adsorbent used is ammonium phosphomolybdate supported on titanium aluminum pyrophosphate. The adsorption rate and resolution rate were 60.9% and 96.3%, respectively.

[0032] The preparation method of the adsorbent is as follows: under the condition of 15°C, weigh 6.72g of ammonium molybdate and dissolve it in 40mL of water. Measure 5 mL of concentrated nitric acid with a mass concentration of 68% and add it to 35 mL of water. After cooling to normal temperature, add 2 g of potassium pyrophosphate to it and mix well. This solution was slowly and uniformly added dropwise to the ammonium molybdate solution within 13.3 hours. After the crystal nuclei appear, quickly sample and filter at a certain interval, and measure the volume of the solution at the same time until the pH value of the solution drops to 1. Measure 30mL of concentrated sulfuric acid in a beaker, place it in an oil bath, start heating,...

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Abstract

The invention is a method for separating and enriching rubidium from rubidium-containing tailings, specifically: stirring and leaching rubidium-containing tailings and hydrochloric acid solution in a stirring tank according to a solid-to-liquid ratio of 1:1-1:10, and filtering Finally, a rubidium-containing solution is obtained; the rubidium-containing solution is adsorbed by an adsorbent, analyzed with an ammonium chloride solution with a mass concentration of 10%-25%, and then a rubidium-containing enrichment solution is obtained. The invention has the advantages of fully utilizing the rubidium resources in the rubidium-containing tailings, realizing the comprehensive utilization of resources; adopting the carrier to load ammonium phosphomolybdate, increasing the particle diameter of the adsorbent, increasing the flow rate of the rubidium-containing solution, thereby The processing capacity of the adsorbent is improved, and the operating cost is reduced; the production equipment and operation are simple, and no pollution is generated in the production process; the adsorbent and the analytical solution used can be recycled.

Description

technical field [0001] The invention relates to a method for separating and enriching rubidium from rubidium-containing tailings, in particular to the separation and enrichment of rubidium in the leaching solution of potassium feldspar decomposition tailings, and belongs to the technical field of comprehensive utilization of tailings. Background technique [0002] The unique characteristics of rubidium and its compounds, such as high stability of radiant energy frequency, easy ionization, excellent photoelectric characteristics and strong chemical activity, etc., have been widely used in national defense industry, aerospace industry, bioengineering, medicine and energy industry, etc. The high-tech field shows broad application prospects and market demand, especially in the energy field with great potential and imagination. Since rubidium is a dispersed element, it often coexists with other alkali metal elements, especially potassium, which is very abundant. Therefore, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/10C22B3/24C22B3/42C22B59/00
Inventor 张光旭王战科
Owner WUHAN UNIV OF TECH
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