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Preparation method of rubidium carbonate and/or cesium carbonate

A technology of rubidium carbonate and cesium carbonate, applied in chemical instruments and methods, rubidium/cesium/francium compounds, inorganic chemistry, etc., can solve the problems of high price of auxiliary reagents, troublesome reprocessing methods, introduction of other impurities, etc., and achieve equipment cost Low requirements, low cost, and no three-waste discharge effect

Pending Publication Date: 2021-03-12
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The second process route is to use sulfuric acid solution to impregnate cesium ore powder in a boiling state, cool to room temperature to obtain cesium vanadium, filter and carry out water-soluble recrystallization of cesium vanadium, add barium hydroxide to remove sulfate and magnesium ions, and then pass Inject carbon dioxide until precipitation is formed, after barium carbonate is filtered out, continue to feed carbon dioxide to obtain cesium carbonate crude product, obtain cesium carbonate solid with higher purity after more than 3 recrystallizations; but the above two processes have the high price of required auxiliary reagent , the reprocessing method is troublesome, causing environmental pollution problems, or may introduce other impurities and other disadvantages

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  • Preparation method of rubidium carbonate and/or cesium carbonate
  • Preparation method of rubidium carbonate and/or cesium carbonate

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preparation example Construction

[0024] An aspect of the embodiments of the present invention provides a kind of preparation method of rubidium carbonate and / or cesium carbonate, it comprises:

[0025] Provide ammonium type natural zeolite as adsorbent;

[0026] Inputting a salt solution containing rubidium and / or cesium into the adsorption column filled with the ammonium-type natural zeolite for dynamic adsorption;

[0027] Using ammonium carbonate solution and / or ammonium bicarbonate solution as eluent to elute the adsorption column after dynamic adsorption to obtain rubidium and / or cesium tail liquid;

[0028] And, the obtained tail liquid containing rubidium and / or cesium is subjected to evaporation, crystallization and calcination to obtain rubidium carbonate and / or cesium carbonate.

[0029] In some more specific embodiments, the ammonium-type natural zeolite is prepared by ammonium bicarbonate and / or ammonium carbonate modified natural zeolite; wherein, the preparation method of the ammonium-type natu...

Embodiment 1

[0054] Embodiment 1: cesium sulfate solution is converted into cesium carbonate through zeolite

[0055] Take 1000g of the purchased natural zeolite, soak it in 500mL of ammonium bicarbonate with a concentration of 2mol / L for 24h to obtain ammonium-type natural zeolite, then put the ammonium-type natural zeolite into a custom-made adsorption column with an inner diameter of 3.75cm, and use a peristaltic pump to The cesium sulfate solution of 9.3mg / L is pumped in from the top of the adsorption column at a pump speed of 5mL / min. When cesium ions are detected to flow out, the dynamic adsorption is stopped, and then the eluent (ammonium bicarbonate) is pumped in at a flow rate of 2mL / min. ), until no cesium ion flows out, the collected adsorption liquid tail liquid and eluent tail liquid (containing cesium tail liquid) are respectively 7.2L and 3.8L; then the eluent tail liquid (containing cesium tail liquid) is evaporated Crystallization, drying treatment, and calcination treatme...

Embodiment 2

[0059] Embodiment 2: cesium sulfate solution is converted into cesium carbonate through zeolite

[0060] Take 1000g of purchased natural zeolite in different batches, soak it in 500mL ammonium bicarbonate with a concentration of 2mol / L for 24h to obtain ammonium-type natural zeolite, then put the ammonium-type natural zeolite into a custom-made adsorption column with an inner diameter of 3.75cm, Pump 9.3mg / L cesium sulfate solution from the top of the adsorption column through a peristaltic pump at a pump speed of 5mL / min. When cesium ions are detected to flow out, stop the dynamic adsorption, and then pump in the eluent at a flow rate of 2mL / min. (2mol / L ammonium bicarbonate), until no cesium ion flows out, the adsorption liquid tail liquid and eluent tail liquid (containing cesium tail liquid) that collect are respectively 6.7L and 4.5L; (Cesium-containing tail liquid) is evaporated and crystallized, dried, and calcined at 300°C for 12 hours to obtain the product cesium carb...

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Abstract

The invention discloses a preparation method of rubidium carbonate and / or cesium carbonate. The preparation method comprises the following steps: inputting a salt solution containing rubidium and / or cesium into an adsorption column filled with ammonium type natural zeolite for dynamic adsorption; taking an ammonium carbonate solution and / or an ammonium bicarbonate solution as eluent to elute the dynamically adsorbed adsorption column to obtain rubidium and / or cesium-containing tail liquid; and carrying out evaporative crystallization and calcination treatment on the obtained rubidium and / or cesium-containing tail liquid to obtain rubidium carbonate and / or cesium carbonate. The invention designs a preparation method for converting sulfate, nitrate and chloride of rubidium or cesium into carbonate. The method has the advantages of low cost, simple process flow and no pollution.

Description

technical field [0001] The invention belongs to the technical field of rubidium and cesium separation and preparation, relates to a method for preparing rubidium carbonate and / or cesium carbonate, in particular to a method for preparing rubidium carbonate and / or cesium carbonate with sulfate, nitrate and chloride of rubidium and / or cesium or cesium carbonate method. Background technique [0002] Due to their unique photoelectric properties, rubidium and cesium compounds have some special and irreplaceable applications in the fields of biomedicine, electronic devices, and aerospace. Due to the large market demand, the price of rubidium (cesium) carbonate is much higher than that of rubidium (cesium) sulfate, nitrate and its chloride. Therefore, converting low-priced rubidium (cesium) sulfate, nitrate and its chloride into carbonate can greatly alleviate the market demand for rubidium (cesium carbonate). [0003] Natural zeolite has abundant reserves in my country, low minin...

Claims

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Application Information

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IPC IPC(8): C01D17/00
CPCC01D17/003
Inventor 叶秀深刘海宁房得珍王艳萍张慧芳李权李明珍吴志坚董明哲
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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