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Method for extracting high-purity cesium carbonate from pollucite

A cesium garnet and cesium carbonate technology, which is applied in the field of extracting high-purity cesium carbonate, can solve problems such as pollution and product purity, and achieve the effects of simple process, less solid waste and high recovery rate

Inactive Publication Date: 2019-08-02
JIANGXI DONGPENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Based on this, the present invention proposes a method for extracting high-purity cesium carbonate from cesium garnet, to solve the pollution problem, product purity problem, product adaptability problem and yield problem in the existing production

Method used

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  • Method for extracting high-purity cesium carbonate from pollucite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Ore grinding: grind the ore to 120 mesh with a ball mill.

[0038] (2) Acidification reaction: mix the ground cesium garnet ore powder with 10 equivalents of concentrated hydrochloric acid (concentration: 32%) after step (1), and heat to 100°C in a closed enamel reaction kettle for reaction 2 Hour.

[0039] (3) Add water to the slurry reacted in step (2), mix at a liquid-solid ratio of 4:1, and heat to 80-100°C for leaching reaction for 1 hour.

[0040] (4) adding sodium hydroxide to the material reacted in step (3) to adjust the pH to 10, so as to precipitate impurities such as aluminum, silicon, calcium and magnesium therein.

[0041] (5) Filter the material after step (4) with a filter press, and then wash the slag with water, and the liquid-solid ratio of the slag washing is 1:1.

[0042] (6) After adjusting the components of the leach solution in step (5), enter the continuous mixing and clarification extraction tank to extract with the special extraction age...

Embodiment 2

[0047] (1) Ore grinding: use a ball mill to grind the ore to 160 mesh.

[0048] (2) Acidification reaction: mix the ground cesium garnet ore powder with 12.5 equivalents of concentrated hydrochloric acid (concentration: 32%) after step (1), and heat to 100°C in a closed enamel reaction kettle for reaction 3 Hour.

[0049] (3) Mix the slurry after the reaction in step (2) with slag washing water and a part of low-concentration leaching solution at a liquid-solid ratio of 4:1, and heat to 90°C for leaching reaction for 1 hour.

[0050] (4) adding sodium hydroxide to the material reacted in step (3) to adjust the pH to 10.5, so as to precipitate impurities such as aluminum, silicon, calcium and magnesium therein.

[0051](5) Filter the material after step (4) with a filter press, and then wash the slag with water, and the liquid-solid ratio of the slag washing is 1:1.

[0052] (6) After adjusting the components of the leach solution in step (5), enter the continuous mixing and ...

Embodiment 3

[0057] (1) Ore grinding: grind the ore to 200 mesh with a ball mill.

[0058] (2) Acidification reaction: mix cesium garnet ore powder after step (1) with 13.5 equivalents of concentrated hydrochloric acid (concentration: 32%), and heat to 100°C in a closed enamel reaction kettle for reaction 3.5 Hour.

[0059] (3) Mix the slurry after the reaction in step (2) with slag washing water and part of the low-concentration leaching solution at a liquid-solid ratio of 4:1, and heat to 90°C for leaching reaction for 1 hour.

[0060] (4) adding sodium hydroxide to the reacted material in step (3) to adjust the pH to 11 to precipitate impurities such as aluminum, silicon, calcium, magnesium and the like.

[0061] (5) Filter the material after step (4) with a filter press, and then wash the slag with water, and the liquid-solid ratio of the slag washing is 1:1.

[0062] (6) After adjusting the components of the leach solution in step (5), enter the continuous mixing and clarification e...

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Abstract

The invention discloses a method for extracting high-purity cesium carbonate from pollucite. The method comprises steps as follows: 1, leaching of pollucite with hydrochloric acid; 2, impurity removalwith a precipitation method; 3, extraction and separation of caesium with a special extracting agent; 4, reextraction with carbon dioxide; 5, deep carbonization through charging of carbon dioxide during concentration of a reextraction solution; 6, recrystallization and purification of a crude product. Cerium in pollucite ore is leached with a hydrochloric acid method, a high-purity single ceriumproduct is obtained with an extraction method, the cerium leaching effect is good, the yield is high, and the extraction and separation effect is good. Carbon dioxide is used for reextraction, and carbon dioxide is charged for deep carbonization during concentration, so that the finally obtained cesium carbonate has the purity of 99.99% or above, cesium carbonate is easily converted into chlorate,sulfate, nitrate, formate and other products. The technological process is simple, few solid wastes are produced, no harmful metal elements are introduced, and thus, the method is safer and more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for extracting high-purity cesium carbonate from cesium garnet. Background technique [0002] Cesium has unique properties, and based on its unique properties, it has been or is being used more and more widely in many high-tech fields. Such as optoelectronic devices, atomic clocks, high-performance batteries, catalysts (inorganic or organic synthesis), high-grade glass-ceramic and so on. [0003] At present, cesium garnet is the main raw material found in the world for the production of cesium salt. Cesium garnet is an aluminosilicate mineral containing more than 20% cesium and about 4% other alkali metals, and its composition is 2Cs 2 O 2A1 2 o 3 9SiO 2 ·H 2 O, the method of producing cesium salt with cesium garnet is divided into two categories: acid method and sintering method. Acid methods include hydrochloric acid method, sulfuric acid method, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D17/00
CPCC01D17/00C01P2006/80
Inventor 彭秋华左青松钟书航
Owner JIANGXI DONGPENG NEW MATERIALS
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