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Catechol-modified mesoporous silicon adsorbent, preparation method and use 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 energy consumption, high toxicity, and unsatisfactory effect, and achieve the effect of improving boron removal efficiency and saving resources

Active Publication Date: 2021-09-28
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 adsorbent, preparation method and use thereof
  • Catechol-modified mesoporous silicon adsorbent, preparation method and use thereof
  • Catechol-modified mesoporous silicon adsorbent, preparation method and use thereof

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Experimental program
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Effect test

Embodiment 1

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

[0040] (1) 50 mmol of the compound of formula (I) (R 1 =H), 250mmol potassium carbonate, 10mmol potassium iodide and 250mL N,N-dimethylformamide were stirred and mixed, stirred at room temperature for 1h under the protection of inert gas, then added 115mmol benzyl chloride, stirred at 70 ° C for 12h, the reaction ended Then, 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 with anhydrous sulfuric acid. After the sodium is dried, the solvent is removed by rotary evaporation, and the compound of formula (II) is obtained by recrystallization with absolute ethanol;

[0041] (2) 10 mmol of ...

Embodiment 2

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

[0047] (1) 50 mmol of the compound of formula (I) (R 1 =H), 250mmol potassium carbonate, 10mmol potassium iodide and 250mL N,N-dimethylformamide were stirred and mixed, stirred at room temperature for 1h under the protection of inert gas, then added 115mmol benzyl chloride, stirred at 70 ° C for 12h, the reaction ended Then, 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 with anhydrous sulfuric acid. After the sodium is dried, the solvent is removed by rotary evaporation, and the compound of formula (II) is obtained by recrystallization with absolute ethanol;

[0048] (2) 10 mmol of ...

Embodiment 3

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

[0054] (1) 20 mmol of the compound of formula (I) (R 1 =NO 2 ), 100mmol of potassium carbonate, 2mmol of tetrabutylammonium iodide and 250mL of N,N-dimethylformamide were stirred and mixed, stirred at room temperature for 1h under the protection of inert gas, then added 46mmol of benzyl chloride, and stirred for 12h at 70°C, 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. After drying with sodium sulfate, the solvent is removed by rotary evaporation, and the compound of formula (II) is obtained by recrystallization with absolute ethanol;

[0055] (2) 10 mmol of the compound of formula (II), 4 mL of ...

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Abstract

The invention discloses two kinds of catechol group-modified MCM-41 and SBA-15 mesoporous silicon adsorbents, a preparation method and application thereof. The boron adsorption capacity of the catechol-modified mesoporous molecular sieve adsorption material synthesized by the present invention reaches 1.799mmol·g ‑1 , much higher than boron adsorption special effect commercial resin; boron isotope separation factor reaches 1.158, much higher than the chemical exchange distillation method used in industry. The catechol group-modified mesoporous boron adsorbent synthesized by the invention can be eluted and regenerated by a low-concentration acetic acid solution, avoiding damage to equipment and personnel caused by the use of strong acid.

Description

technical field [0001] The invention belongs to the technical field of preparation of mesoporous silicon adsorbents, and mainly relates to a mesoporous silicon adsorbent modified by catechol, a preparation method and uses 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 have very adverse effects on the growth and development of organisms, and a large amount of high-concentration boron solutions generated due to widespread use need to be treated urgently. On the other hand, the high abundance of both 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 method for the separation of boron isotopes. [0003] In the past few decades, many separation techniques have been applied to remove boron from aqueous ...

Claims

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Application Information

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Patent Type & Authority Patents(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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