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Preparation method for metal oxide nano-materials, and method for separating boron isotopes by using nano-materials as stationary phase of simulated moving bed

A technology for simulating moving bed and nanomaterials, applied in the field of boron isotope separation by metal oxide nanomaterials, can solve the unsatisfactory and limited industrial application of chromatography, etc.

Active Publication Date: 2019-01-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sonoda et al. conducted research on the boron special effect resin IRA743, and the measured 10 B / 11 The B separation factor is 1.027, which still cannot meet the actual production needs
Limiting the Industrial Application of Chromatography in the Field of Boron Isotope Separation

Method used

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  • Preparation method for metal oxide nano-materials, and method for separating boron isotopes by using nano-materials as stationary phase of simulated moving bed
  • Preparation method for metal oxide nano-materials, and method for separating boron isotopes by using nano-materials as stationary phase of simulated moving bed
  • Preparation method for metal oxide nano-materials, and method for separating boron isotopes by using nano-materials as stationary phase of simulated moving bed

Examples

Experimental program
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Effect test

Embodiment 1

[0064] 1. Preparation of metal oxide nanomaterial Cu 2 o

[0065] The reaction was carried out in a 2L three-necked flask, and 800mL, 1.0mol·L-1 NaOH solution and 40mL, 1.0mol·L-1 C 6 h 12 o 6 ·H 2 O solution, added to an electrically stirred 200 mL, 20 wt% CuSO4 5H at a certain initial temperature 2 In the O solution, there are blue flocs in the solution at this time, the oil bath is heated to 70°C, and the blue flocs

[0066] Disappeared, brick-red or brick-yellow particles precipitated in the system, the resulting product was filtered, and the filter cake was washed with hot distilled water and absolute ethanol for 3 to 4 times, and finally the obtained sample was vacuum-dried at 60°C for 2 hours to obtain powdered Cu2O sample.

Embodiment 2

[0068] Preparation of Metal Oxide Nanomaterial CuO

[0069] 0.5molCu(NO 3 ) 2 ·3H 2 O was dissolved in 1000 mL of absolute ethanol, and magnetically stirred to dissolve it, and Cu(NO 3 ) 2 ethanol solution. The solution is slowly added dropwise with concentrated ammonia water under stirring, and the pH value is controlled at about 9, so that it can completely react to form Cu(OH) 2 Sol. Cu(OH) 2 The sol was transferred to a high-pressure reactor, the temperature was programmed to 250 °C, and the pressure was controlled to 7.5 MPa. After a period of heat preservation and pressure, the gas was slowly released, and then the protective gas (N 2 ) was naturally cooled to room temperature, and black fluffy nano-sized CuO ultrafine powder was obtained.

Embodiment 3

[0071] Preparation of Metal Oxide Nanomaterial ZnO

[0072] A certain amount of 6gZn(NO 3 ) 2 ·6H 2 O was dissolved in 50ml of deionized water, and the aqueous solution of sodium hydroxide (4g / L) and sodium carbonate (pH=10) with a certain concentration prepared was slowly dripped successively under stirring until the pH was 9, and the resulting product was Zn 2 (OH) 2 CO 3 , filtered and washed, dried at about 70°C, ground and sieved, and then put into a muffle furnace for calcination to obtain nano-zinc oxide. The calcination temperature used was 500°C and the calcination time was 1 h.

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Abstract

The invention relates to the application of metal oxide nano-materials to the separation of boron isotopes, particularly to a preparation method for the metal oxide nano-materials, and method for separating boron isotopes by using the nano-materials as stationary phases of a simulated moving bed. The method for separating boron isotopes by using nine nano-materials as stationary phases of the simulated moving bed comprises the following steps: firstly preparing an aqueous boric acid solution with a concentration of 1-70 g / L, and adjusting the pH value of the boric acid solution to 6-12 by using a sodium hydroxide solution with a concentration of 4-40 g / L so as to obtain a stock solution; then separately filtering the stock solution and an aqueous acetic acid solution with a pH value of 4-6by using filter membranes to remove impurities in the solutions, and performing ultrasonic degassing for 15-30 minutes; and with the simulated moving bed comprising I-IV zones, each zone consisting of 2-8 chromatographic columns, and with metal oxide nanoparticles as the stationary phases of the simulated moving bed, opening an extraction end valve to collect an aqueous solution with enriched <10>B and collecting an aqueous solution with enriched <11>B isotopes at a raffinate end when the simulated moving bed reaches equilibrium.

Description

technical field [0001] The invention relates to the application of metal oxide nanomaterials for separating boron isotopes, in particular to a method for preparing metal oxide nanomaterials and a method for separating boron isotopes by using the nanomaterials as a stationary phase of a simulated moving bed. Background technique [0002] Boron has two stable isotopes 10 B and 11 B, whose natural abundances are 19.9% ​​and 80.1%, respectively. because 10 The thermal neutron capture cross-sectional area of ​​B is much larger than 11 B and natural boron, so high abundance 10 B is widely used in the nuclear industry, mainly as reactor control rods and thermal neutron shielding materials, and secondly in medicine 10 B can also be used to treat gliomas and melanomas. [0003] In order to obtain enriched from natural boron 10 B, people have carried out a lot of research work, the current boron isotope separation process mainly includes: chemical exchange rectification method,...

Claims

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Application Information

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IPC IPC(8): C01G3/02C01G9/02C01F7/36C01F7/44C01G45/02C01G23/053C01G37/02C01F17/00C01G25/02B01D59/26B82Y30/00
CPCB01D59/26B82Y30/00C01F7/36C01F7/441C01G3/02C01G9/02C01G23/0536C01G25/02C01G37/02C01G45/02C01P2002/72C01F17/206
Inventor 郭翔海陈涛白鹏
Owner TIANJIN UNIV
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