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Boron-strontium ion adsorbent, preparation method and application of adsorbent

A technology of adsorbent and strontium ion, applied in the field of selective separation of metal ions, can solve the problems of high cost and large environmental impact, and achieve the effect of simple and fast preparation method

Inactive Publication Date: 2014-07-02
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the extraction method has good selectivity and high efficiency, it is more suitable for the separation of strontium in a system with a higher concentration, and a large amount of organic diluents and co-extraction agents are used in the extraction process, which is costly and harmful to the environment. Greater impact
[0009] In addition, the adsorbents in the prior art are all aimed at the adsorption and separation of one ion in aqueous solution. Even if boron and strontium ions need to be separated at the same time, it can only be carried out in two steps.

Method used

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  • Boron-strontium ion adsorbent, preparation method and application of adsorbent
  • Boron-strontium ion adsorbent, preparation method and application of adsorbent
  • Boron-strontium ion adsorbent, preparation method and application of adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1. Preparation of boron-strontium composite adsorbent

[0042] Raw materials: boron adsorption material is D564 boron selective resin, commercially available; strontium adsorption material is bisbenzo 18-crown-6, Fluka Reagent Company.

[0043] Bromination: Weigh 10g of bisbenzo-18-crown-6 and dissolve in 300mL CHCl 3 , forming a colorless and transparent solution; adding 10 g of liquid bromine to form a yellow system; heating the reaction system to reflux for 35 minutes, and the system turned orange-red, and after 2 hours, the reflux reaction was complete to obtain an orange-red clear solution.

[0044] Compounding: Mix 65mL of bromination reaction solution with 2g of D564 boron resin, slowly add 40mL of 10% NaOH solution dropwise, seal, and stir for 24 hours. The product was filtered out, washed successively with chloroform and distilled water until neutral, and dried at 60°C for 4 hours to obtain off-white spherical particles.

[0045] The D564 resin itself only ha...

Embodiment 2

[0055] 1. Preparation of boron-strontium composite adsorbent

[0056] The raw materials and preparation method are the same as in Example 1, except that different relative amounts of raw materials are used in Example 2. The amount of D564 resin and bromocrown ether-chloroform solution, and the quality of the obtained boron strontium ion composite adsorbent are shown in Table 1 below.

[0057] Table 1 bromocrown ether-chloroform solution, D564 resin, and the amount of the obtained boron strontium ion composite adsorbent

[0058]

[0059]

[0060] Similar to Example 1, the D564 resin itself only has adsorption to boron, but no adsorption to strontium. After being synthesized into the composite adsorbent of the present invention, the adsorption to strontium is better, and along with the addition of strontium adsorption material (crown ether) in the synthesis ) changes, the adsorption amount of strontium also changes, which shows that the crown ether is loaded on the D564 r...

Embodiment 3

[0068] 1. Preparation of boron-strontium composite adsorbent

[0069] Raw material: The strontium adsorption material is bis-benzo-18-crown-6, Fluka Reagent Company.

[0070] Preparation of boron adsorption material (organosilicon hybrid gel): mix 19.5g N-methylglucamine with 24mL γ-(2,3-glycidoxy)propyltrimethoxysilane (the ratio of substances is 1: 1) Mix 100mL N,N-dimethylformamide, stir and react at 75°C until a milky white waxy substance is produced (it takes about 4 hours), take out the milky white waxy substance, and cool it for later use.

[0071] Dissolve 20g of the cooled waxy substance in 5mL of water, add 5mL of bis(γ-trimethoxysilylpropyl)amine dropwise with stirring until a gel is formed, seal it and let it stand for 24 hours, take it out and dry it at 30°C, Grind and sieve, take 20-60 mesh, wash several times with water, and dry at 30°C to obtain organosilicon hybrid gel boron adsorbent.

[0072] Bromination: with embodiment 1. Composite: Same as Example 1, e...

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Abstract

The invention relates to selective separation techniques of metal ions and specifically discloses a boron-strontium ion composite adsorbent. The boron-strontium ion composite adsorbent comprises a boron adsorption material framework and a strontium adsorption material which is grafted on the surface or in a channel of the boron adsorption material framework. The invention also discloses a preparation method of the boron-strontium ion composite adsorbent and a method for selectively adsorbing boron ions and strontium ions from a solution system. By grafting and compounding substances which are capable of selectively adsorbing the boron ions and the strontium ions respectively, a composite adsorbent capable of selectively adsorbing the boron ions and the strontium ions can be obtained. The preparation method is simple and rapid; the prepared composite adsorbent can be used for selectively adsorbing the boron ions and the strontium ions simultaneously or respectively.

Description

technical field [0001] The invention relates to metal ion selective separation technology, in particular to a boron strontium ion composite adsorbent, its preparation method and application. Background technique [0002] Boron and boron compounds have light weight, flame retardancy, heat resistance, high hardness, high strength, wear resistance and catalytic properties, so they play an important role in modern science and technology, and are widely used in various sectors of the national economy. For example borosilicate additives, ceramics, cosmetics industry, leather, textiles, wood processing coatings, detergents, insecticides and disinfectants and preparation of pharmaceuticals. Boron is also an essential trace element for plant growth, and crop yield can be increased by 10-15% after application of boron fertilizer. However, excessive boron consumption can cause boron poisoning in plants, and excessive boron content in drinking water can lead to acute boron poisoning in...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C02F1/28
Inventor 刘海宁高灿叶秀深高晓雷李明珍王世栋吴志坚
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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