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Catechol-modified mesoporous silicon adsorbents, preparation method and application thereof

A technology of catechol and mesoporous silicon, which is applied in the field of preparation of mesoporous silicon adsorbent, can solve the problems of high toxicity, high energy consumption, and high corrosion of boron trifluoride, so as to save resources and improve boron removal efficiency effect

Active Publication Date: 2019-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the chemical exchange distillation method has been industrialized, it consumes a lot of energy. The boron trifluoride used is highly corrosive and highly toxic, and the separation factor is only 1.03; the separation factor of the commercially applied boron special effect resin is only 1.027. Unsatisfactory effect

Method used

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  • Catechol-modified mesoporous silicon adsorbents, preparation method and application thereof
  • Catechol-modified mesoporous silicon adsorbents, preparation method and application thereof
  • Catechol-modified mesoporous silicon adsorbents, preparation method and application thereof

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Effect test

Embodiment 1

[0039] The preparation method of the mesoporous silicon adsorption material modified by catechol comprises the steps:

[0040] (1) 50mmol formula (I) compound (R 1 =H), 250mmol potassium carbonate, 10mmol potassium iodide and 250mL N,N-dimethylformamide were stirred and mixed, under the protection of inert gas, stirred at room temperature for 1h, then added 115mmol benzyl chloride, stirred at 70°C for 12h, and the reaction was completed Finally, the product was extracted three times with ethyl acetate and saturated sodium chloride solution, the aqueous layer was taken out and extracted three times with ethyl acetate, the organic phase was combined, and then extracted three times with saturated sodium chloride solution, and the organic phase was extracted with anhydrous sulfuric acid After sodium drying, the solvent was removed by rotary evaporation, and the compound of formula (II) was obtained by recrystallization with absolute ethanol;

[0041] (2) 10mmol formula (II) compo...

Embodiment 2

[0046] The preparation method of the mesoporous silicon adsorption material modified by catechol comprises the steps:

[0047] (1) 50mmol formula (I) compound (R 1 =H), 250mmol potassium carbonate, 10mmol potassium iodide and 250mL N,N-dimethylformamide were stirred and mixed, under the protection of inert gas, stirred at room temperature for 1h, then added 115mmol benzyl chloride, stirred at 70°C for 12h, and the reaction was completed Finally, the product was extracted three times with ethyl acetate and saturated sodium chloride solution, the aqueous layer was taken out and extracted three times with ethyl acetate, the organic phase was combined, and then extracted three times with saturated sodium chloride solution, and the organic phase was extracted with anhydrous sulfuric acid After sodium drying, the solvent was removed by rotary evaporation, and the compound of formula (II) was obtained by recrystallization with absolute ethanol;

[0048] (2) 10mmol formula (II) compo...

Embodiment 3

[0053] The preparation method of the mesoporous silicon adsorption material modified by catechol comprises the steps:

[0054] (1) 20mmol formula (I) compound (R 1 = NO 2 ), 100mmol potassium carbonate, 2mmol tetrabutylammonium iodide and 250mL N,N-dimethylformamide were stirred and mixed, and stirred at room temperature for 1h under the protection of an inert gas, then 46mmol benzyl chloride was added, and the reaction was stirred at 70°C for 12h, After the reaction, the product was extracted three times with ethyl acetate and saturated sodium chloride solution, the aqueous layer was taken out and extracted three times with ethyl acetate, the organic phases were combined, and then extracted three times with saturated sodium chloride solution, and the organic phase was extracted three times with After drying over sodium sulfate, the solvent was removed by rotary evaporation, and the compound of formula (II) was obtained by recrystallization with absolute ethanol;

[0055] (2...

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Abstract

The invention discloses two catechol group-modified MCM-41 and SBA-15 mesoporous silicon adsorbents, a preparation method and an application thereof. The boron adsorption amount of the catechol-modified mesoporous molecular sieve adsorption material synthesized by the invention reaches 1.799 mmol*g-1, and is far higher than that of the boron adsorption specific commercial resin; a boron isotope separation factor reaches 1.158, and is much higher than a chemical exchange distillation method used in industry. The catechol group-modified mesoporous boron adsorbent synthesized by the invention canbe eluted and regenerated by a low-concentration acetic acid solution, and thus the damage to equipment and personnel caused by using strong acid.

Description

technical field [0001] The invention belongs to the technical field of mesoporous silicon adsorbent preparation, and mainly relates to a catechol-modified mesoporous silicon adsorbent, a preparation method and an application thereof. Background technique [0002] Boron is an essential basic nutrient element for animals, plants and humans. Boron and its compounds are widely used in daily life and industry. However, high-concentration boron solutions will have very adverse effects on the growth and development of organisms, and a large amount of high-concentration boron solutions produced due to widespread use need to be treated urgently. On the other hand, the high abundance of two boron isotopes 10 B and 11 B is widely used in the nuclear industry and semiconductor industry, and it is necessary for the research of an efficient boron isotope separation method. [0003] In the past few decades, many separation techniques have been applied to remove boron from aqueous soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D59/26
CPCB01D59/26B01J20/103B01J20/22B01J2220/46B01J2220/4812
Inventor 郭翔海陈远志白鹏
Owner TIANJIN UNIV
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