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Method for extracting rubidium and caesium from coal mine water

A technology for mine water and coal mines, applied in the field of element separation, can solve the problems of not being effectively utilized, low selectivity of rubidium and cesium, and insufficient attention, etc., to achieve reduced labor costs, high selectivity, and short production cycle Effect

Active Publication Date: 2017-09-05
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these coal mines, cesium is symbiotic with lithium, sodium, potassium, rubidium, magnesium, calcium and other elements. The physical and chemical properties of these symbiotic elements are similar, which brings certain difficulties to separation and extraction.
Zeolite is favored for its stable properties, abundant resources, and low price, but its selectivity to rubidium and cesium is not high. Coal mine water has not been effectively utilized for a long time, and the use of coal mine water to extract rubidium and cesium has not been obtained. Give full attention to waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for separating and extracting rubidium and cesium from coal mine water, comprising the following steps: step (1), the raw water of coal mine mine water is subjected to primary filtration to remove suspended solids and coal slag, and then ultrafiltration is performed to remove bacteria and viruses. The hollow fiber ultrafiltration membrane is used for ultrafiltration; the effluent from the ultrafiltration is evaporated until the concentration of rubidium and cesium is greater than 5g / L, and the pH value is adjusted to 8;

[0031] In step (2), the coal mine water treated in step 1) is filled with zirconium phosphate, titanium phosphate and

[0032] Polyvinyl alcohol is the first ion exchange column of a mixture composed of 10:3:0.5 by weight. In this step, the coal mine water temperature is controlled at 20°C to obtain filtrate; the aspect ratio of the first exchange column is 30, the flow rate is 0.1mL / min.

[0033] Step (3), pass step 2) through the filtrate o...

Embodiment 2

[0039] A method for separating and extracting rubidium and cesium from coal mine water, comprising the following steps: step (1), the raw water of coal mine mine water is subjected to primary filtration to remove suspended solids and coal slag, and then ultrafiltration is performed to remove bacteria and viruses. The hollow fiber ultrafiltration membrane is used for ultrafiltration; the effluent from the ultrafiltration is evaporated until the concentration of rubidium and cesium is greater than 32g / L, and the pH value is adjusted to 9;

[0040] In step (2), the coal mine water treated in step 1) is filled with zirconium phosphate, titanium phosphate and

[0041] The polyvinyl alcohol is the first ion exchange column of the mixture composed of 10:5:0.5 according to the weight ratio. In this step, the mine water temperature of the coal mine is controlled at 40°C to obtain the filtrate; the aspect ratio of the first exchange column is 80, the flow rate is 0.5mL / min.

[0042] St...

Embodiment 3

[0048] A method for separating and extracting rubidium and cesium from coal mine water, comprising the following steps: step (1), the raw water of coal mine mine water is subjected to primary filtration to remove suspended solids and coal slag, and then ultrafiltration is performed to remove bacteria and viruses. The hollow fiber ultrafiltration membrane is used for ultrafiltration; the ultrafiltration effluent is evaporated until the concentration of rubidium and cesium is greater than 28g / L, and the pH value is adjusted to 10.2;

[0049] In step (2), the coal mine water treated in step 1) is filled with zirconium phosphate, titanium phosphate and

[0050] Polyvinyl alcohol is the first ion exchange column of the mixture composed of 10: 5:0.5 according to the weight ratio. In this step, the coal mine water temperature is controlled at 28 ° C to obtain the filtrate; the aspect ratio of the first exchange column is 42, the flow rate is 0.3mL / min.

[0051] Step (3), pass step 2...

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Abstract

The invention relates to a method for extracting rubidium and caesium from coal mine water. The method includes the steps of 1), evaporating the coal mine water and adjusting the pH value of the same to be 8-11.5; 2), allowing the treated coal mine water to pass a first ion exchange column loaded with a mixture composed of zirconium phosphate, titanium phosphate and a binder to obtain a filtrate; 3), allowing the filtrate passing the first ion exchange column to pass a second ion exchange column loaded with calcium alginate-ammonium molybdopho-sphate; 4), taking raw materials in the first ion exchange column, performing desorption on caesium ions by performing ion exchange with an ammonium chloride solution, and performing evaporation and concentration to obtain a caesium solution; 5), taking out the calcium alginate-ammonium molybdopho-sphate from the second ion exchange column, performing desorption on rubidium ions by adopting water solutions of nitric acid and hydrobromic acid, and carrying out evaporation and concentration to obtain a rubidium solution. The rubidium and the caesium are selectively adsorbed through different substances, the extraction process of the rubidium and the caesium in the coal mine water is simplified, the method is good in safety and short in production cycle, and labor cost is reduced.

Description

technical field [0001] The invention relates to a method for separating and extracting rubidium and cesium from coal mine water, belonging to the technical field of element separation. Background technique [0002] Rubidium and cesium have strong chemical activity and excellent photoelectric effect performance, and have great development in traditional application fields such as photoelectric conversion devices, optical crystals, optical glasses, catalysts, special glasses, biochemistry and medicine. The basic raw materials for industrial production of rubidium and cesium are mainly solid ores such as cesium garnet and lepidolite, whose extraction process is relatively complicated, costly and consumes a lot of energy. In addition to solid ore, cesium is also widely distributed in coal mine water. In these coal mines, cesium is symbiotic with lithium, sodium, potassium, rubidium, magnesium, calcium and other elements. The physical and chemical properties of these symbiotic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/22C22B3/42C22B26/10
CPCC22B3/22C22B3/42C22B26/10Y02P10/20
Inventor 孙玉壮赵存良王金喜李彦恒石志祥孟志强
Owner HEBEI UNIV OF ENG
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