Compound adsorbent for absorbing rubidium ions as well as preparation method and application of compound adsorbent

A composite adsorption and rubidium ion technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of slow flow rate and unsuitable column separation operation, etc., and achieve low preparation cost and good selective adsorption properties, to avoid the effect of adsorption efficiency

Active Publication Date: 2016-06-15
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ion exchange method is used to separate and extract rubidium ions in salt lake brine. The commonly used ion exchangers mainly include heteropolyacid salts, ferrous iron, etc. At present, ammonium phosphomolybdate (AMP for short) is widely used. AMP is more selective. Good ion exchanger; however, although AMP has a large exchange capacity, it is in the form of powder with a microcrystalline structure, and the flow rate during column operation is very slow, which is not suitable for column separation operation

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  • Compound adsorbent for absorbing rubidium ions as well as preparation method and application of compound adsorbent
  • Compound adsorbent for absorbing rubidium ions as well as preparation method and application of compound adsorbent

Examples

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Embodiment 1

[0027] Embodiment 1 according to the present invention discloses a composite adsorbent for adsorbing rubidium ions from an adsorption solution containing rubidium ions, magnesium ions, and potassium ions and a preparation method thereof.

[0028] The composite adsorbent according to the present embodiment includes alkylated zeolite and ammonium phosphomolybdate interconnected using a silane coupling agent.

[0029] The preparation method of the composite adsorbent of this embodiment will be described in detail below.

[0030] In step one, activated zeolite is prepared.

[0031] Specifically, put 8g of artificial zeolite in a 200mL three-neck flask, add 80mL of hydrochloric acid aqueous solution with a substance concentration of 4mol / L, heat to a slight boil and reflux for 8h, and solid-liquid separation after cooling to obtain the third filter residue and the first third filtrate, and finally wash the third filter residue with distilled water until its surface is neutral to o...

Embodiment 2

[0038]In the description of Embodiment 2, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 2 and embodiment 1 is: in step one, 8g artificial zeolite is placed in 200mL there-necked flask, to which adding 150mL substance concentration is the hydrochloric acid aqueous solution of 6mol / L, is heated to slight boiling and Reflux for 24h, and refer to the rest as described in Example 1 to obtain activated zeolite; in step 2, take 4g of the above-mentioned activated zeolite and place it in 200mL toluene to obtain a second mixture; then add 40mL of the second mixture dropwise under stirring Silane coupling agent, heated to slight boiling and refluxed for 24 hours, obtained the second filter residue and the second filtrate through solid-liquid separation, washed the second filter residue with toluene and absolute ethanol in sequence, and dried the second filter residue at 80°C fo...

Embodiment 3

[0041] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 3 and embodiment 1 is: in step one, 8g artificial zeolite is placed in 200mL there-necked flask, to which adding 100mL substance concentration is the hydrochloric acid aqueous solution of 5mol / L, is heated to slight boiling and Reflux for 12h, and refer to the description in Example 1 for the rest to obtain activated zeolite; in step 2, take 6g of the above-mentioned activated zeolite and place it in 160mL of benzene to obtain a second mixture; then add 35mL of it dropwise to the second mixture under stirring Silane coupling agent, heated to slight boiling and refluxed for 12 hours, obtained the second filter residue and the second filtrate through solid-liquid separation, washed the second filter residue with benzene and absolute ethanol in sequence, and dried the second filter r...

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Abstract

The invention discloses a preparation method of a compound adsorbent for absorbing rubidium ions. The preparation method comprises the following steps: (A) providing activating zeolite; (B) processing the activating zeolite into alkylated zeolite by virtue of a silane coupling agent; and (C) dissolving ammonium phosphomolybdate into an oxidant to obtain a first mixture, adding the alkylated zeolite into the first mixture, carrying out boiling reflux for at least 8 hours, filtering to obtain a first filter residue and first filtrate, and drying the first filter residue, so as to obtain the compound adsorbent. The invention further discloses the compound adsorbent prepared by virtue of the preparation method and application of the compound adsorbent in the absorption of the rubidium ions. The compound adsorbent has good selective adsorbability, and furthermore, the preparation method is simple; meanwhile, by applying the compound adsorbent to the absorption of the rubidium ions, the continuous stable absorption-elution operation can be realized.

Description

technical field [0001] The invention belongs to the technical field of salt lake chemistry and chemical engineering, and in particular relates to a composite adsorbent for adsorbing rubidium ions and its preparation method and application. Background technique [0002] The extraction of rubidium metal resources in my country mainly comes from rubidium-containing ores, but due to the limitation of technology and mineral resources, the extraction of rubidium metal in ores can no longer meet the society's growing demand for rubidium metal. Another enrichment form of metal rubidium exists in salt lake brine in the form of rubidium ions, and Qaidam salt lake brine will become Therefore, it is of great significance to extract and separate rubidium ions from Qaidam Salt Lake brine. [0003] Because rubidium ions often coexist with other alkali metal ions, and their physical and chemical properties are very close, this brings great difficulties to the separation, purification and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C02F1/28C02F101/20
CPCB01J20/0218B01J20/0259B01J20/186C02F1/288C02F2101/20
Inventor 王舒娅郑红段东平李波宝阿敏黄东方
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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