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Boron selective gel adsorbent containing polyhydroxy functional groups, preparation and application thereof

A polyhydroxyl functional and selective technology, applied in adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problem of poor adsorption capacity and selectivity of non-specific adsorbents, complex preparation process of boron-specific adsorption resins, Unsatisfactory mechanical strength and other problems, to achieve the effect of easy industrial application, small shrinkage and expansion, and low cost

Inactive Publication Date: 2009-10-07
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

There are some problems in the commercialized or literature-reported boron adsorbents at present: (1) the preparation process of the boron special-effect adsorption resin is complicated and the cost is high; (2) the boron special-effect adsorption resin is an organic polymer material with poor mechanical properties, especially When used in a solution with high ionic strength, the mechanical strength is even less ideal, and it is easily broken during the adsorption-desorption cycle; (3) the adsorption capacity and selectivity of the non-specific adsorbent of boron are poor

Method used

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  • Boron selective gel adsorbent containing polyhydroxy functional groups, preparation and application thereof
  • Boron selective gel adsorbent containing polyhydroxy functional groups, preparation and application thereof
  • Boron selective gel adsorbent containing polyhydroxy functional groups, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Γ-glycidoxypropyltrimethoxysilane and ethyl orthosilicate were selected as the organic silicon raw materials, and N-methylglucamine was selected as the compound containing polyhydroxyl groups.

[0031] Weigh 19.5g of N-methylglucamine and 24mL of γ-glycidoxypropyltrimethoxysilane in 100mL of N,N-methylformamide solvent, stir and react at 50~80℃ for 4h to obtain Hydroxyl functional group gel precursor. The obtained gel precursor was washed with ethanol and dried at 30°C to obtain 112 g of solid which can be used for the synthesis of gel adsorbent. The preparation process of the polyhydroxy-containing gel precursor is as follows:

[0032]

[0033] Among them GPTMS-γ-glycidoxypropyl trimethoxysilane

[0034] MG-N-Methyl Glucosamine

[0035] W-gel precursor

[0036] DMF——N,N-Methylformamide

[0037]Dissolve the gel precursor prepared above in 50 mL of water, add 50 mL of tetraethyl orthosilicate, and stir continuously. After the system is uniform, add 10 mL of 2mol / L hydrochl...

Embodiment 2

[0043] Choose γ-glycidoxypropyltrimethoxysilane and ethyl orthosilicate as the gel raw materials, and N-methylglucosamine as the compound containing polyhydroxy groups. The gel is obtained first and then the polyhydroxy compound is used. The reaction method prepares the adsorbent.

[0044] Mix 24mL of γ-glycidoxypropyltrimethoxysilica with 50mL of ethyl orthosilicate and 50mL of water. After the system is uniform, add 10mL of 2mol / L hydrochloric acid, stir and hydrolyze for 2h, add 10mL of 5mol / L of ammonia, Stir vigorously until it is gelled and age it for 12h, dry at 30℃, pulverize through a 20-60 mesh sieve, then wash several times, and then dry at 30℃, the obtained dry gel is used to prepare polyhydroxy functional groups Boron selective gel adsorbent.

[0045] The obtained gel and 19.5g N-methylglucosamine were stirred and reacted at 50~80℃ for 4h in 100mL N,N-methylformamide solvent to obtain a gel containing polyhydroxy functional groups, which was washed with ethanol , Drie...

Embodiment 3

[0048] Γ-(methacryloyloxy)propyl trimethoxy silicon and ethyl orthosilicate were selected as the organic silicon raw materials, and glucosamine was selected as the compound containing polyhydroxyl groups.

[0049] Weigh 18.0g glucosamine and 23.8mL γ-(methacryloyloxy)propyl trimethoxy silicon, and stir and react for 4h at 70~110℃ in 100mL N,N-methylformamide solvent to obtain Gel precursor containing polyhydroxy functional groups. The obtained gel precursor was washed with ethanol and dried at 30°C to obtain 108 g of solid, which can be used for the synthesis of gel adsorbent. The preparation process of polyhydroxy-containing gel precursor is shown in the figure below:

[0050]

[0051] Among them GPTMS-γ-(methacryloyloxy) propyl trimethoxy silicon

[0052] AG-Glucosamine

[0053] W′——gel precursor

[0054] DMF——N,N-Methylformamide

[0055] Dissolve the gel precursor 2 prepared above in 50 mL of water, add 50 mL of tetraethyl orthosilicate, and keep stirring. After the system is...

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Abstract

The invention provides a boron selective gel adsorbent containing polyhydroxy functional groups; the preparation method includes the following steps: a gel precursor is synthesized by organosilane and a compound containing polyhydroxy functional groups in an organic solvent and then a boron selective gel adsorbent containing polyhydroxy functional groups is obtained through the hydrolysis-condensation reaction of the precursor and organic silicon; or gel is firstly obtained through the hydrolysis-condensation reaction of the organic silicon and the surface of the compound with polyhydroxy functional groups used by the gel is modified to prepare the boron selective gel adsorbent containing polyhydroxy functional groups. The prepared adsorbent has higher loading capacity for boron and has better mechanical strength and the advantage is more obvious in high ionic strength solution and can be used for adsorptive separation of boron or the removal of detrimental impurities in the solution containing boron. The preparation process has simple process, convenient operation, low cost and easy industrial application.

Description

Technical field [0001] The invention belongs to the technical field of composite materials, and relates to a gel adsorbent and, in particular, to a preparation method of a hybrid gel boron adsorbent. The invention also relates to the application of the adsorbent in the adsorption and separation of boron. Background technique [0002] Boron and its compounds are widely used in metallurgy, ceramics, medicine, tanning, textiles, coatings, fertilizers, pigments, aviation and other fields. Therefore, it is necessary to separate and extract boron from natural solid and liquid boron ore. As far as the actual situation of boron resources in my country is concerned, liquid boron ore has large reserves and relatively low development costs, which has attracted widespread attention. With the widespread application of boron and related compounds, the boron content in certain industrial wastewater and domestic sewage has gradually increased, which has caused a negative impact on the environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/291B01J20/30C02F1/28C02F1/58
Inventor 吴志坚刘海宁叶秀深李权卿彬菊郭敏葛飞
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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