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A kind of macroporous iron oxide and preparation method thereof

A technology of iron oxide and pore size, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of uneven distribution of pores in materials, long time-consuming template assembly, and difficulty in industrial production, and achieve high concentration of pore size and production Low-cost, high-reproducibility results

Active Publication Date: 2021-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Combining the above analysis, it can be seen that the existing preparation methods of macroporous or porous iron oxide materials still have problems such as long template assembly time, high preparation cost, difficulty in industrial production, uneven pore distribution of the material, and poor physical and chemical properties.

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  • A kind of macroporous iron oxide and preparation method thereof
  • A kind of macroporous iron oxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041](1) Dissolve 0.4 g of sodium hydroxide in 40 mL of 25 wt% TEAOH and 10 mL of distilled water, and stir for 30 min. Then add 0.7 g of sodium aluminate and stir for 30 min. Add 12 g of white carbon black slowly and stir for 30 min. Then put it into a closed reactor and crystallize in an oven at 140°C for 30 h. Then the obtained product was washed with distilled water to neutrality, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve;

[0042] (2) Put the Beta molecular sieve obtained in step (1) into 50 mL of 50wt% propylene glycol solution and allow it to settle naturally. When the molecular sieve has just settled to the bottom, take out 1 / 3 of the solution in the middle of the entire solution and filter it. Dry at 120°C for 10 hours;

[0043] (3) Mix the Beta molecular sieve obtained in step (2) with 15mL of 10wt% sodium benzoate solution, sonicate for 20min, the frequency of the ultrasonic wave is 0.01MHz, and the power is 20W / L according to the v...

Embodiment 2

[0049] (1) Dissolve 0.2g of sodium hydroxide in 40mL of 25wt% TEAOH and 20 mL of distilled water, stir for 30 min, then add 0.7 g of sodium aluminate, stir for 30 min, then slowly add 17 g of white carbon black, stir for 30 min . Then put it into a closed reactor and crystallize in an oven at 160°C for 20 h. Then the obtained product was washed with distilled water to neutrality, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve;

[0050] (2) Put the Beta molecular sieve obtained in step (1) into 80 mL of 70wt% glycerol solution and let it settle naturally. Filter and dry at 120°C for 10 hours;

[0051] (3) Mix the Beta molecular sieve obtained in step (2) with 5mL of 18wt% sodium benzoate solution, ultrasonicate for 20min, the ultrasonic frequency is 10MHz, and the power is 100W / L based on the volume of the solution; Dry for 12 hours.

[0052] (4) Add 1.8g of beta molecular sieve and 1g of ferric nitrate obtained in step (3) into 30mL of water, stir ...

Embodiment 3

[0057] (1) Dissolve 0.8 g of sodium hydroxide in 40 mL of 25 wt% TEAOH and 10 mL of distilled water, and stir for 30 min. Then add 1.2 g of sodium aluminate and stir for 30 min. Add 12 g of white carbon black slowly and stir for 30 min. Then put it into a closed reactor and crystallize in an oven at 105°C for 50 h. Then the obtained product was washed with distilled water to neutrality, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve;

[0058] (2) Put the Beta molecular sieve obtained in step (1) into 20 mL of 10wt% propylene glycol solution and allow it to settle naturally. When the molecular sieve has just settled to the bottom, take out 1 / 7 of the solution in the middle of the entire solution and filter it. Dry at 120°C for 10h.

[0059] (3) Mix the Beta molecular sieve obtained in step (2) with 5mL of 10wt% sodium benzoate solution, ultrasonicate for 20min, the ultrasonic frequency is 1MHz, and the power is 55W / L based on the volume of the soluti...

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Abstract

The invention provides a macroporous iron oxide and a preparation method thereof. The iron oxide is composed of α-iron oxide, has macropore channels, and the diameter of the macropores ranges from 50 to 1500 nm. The preparation method comprises pretreatment of Beta molecular sieve; then mixing Beta molecular sieve, ferric nitrate and water, stirring and ultrasonic treatment; further drying and high temperature treatment; finally treating in alkaline solution to obtain macroporous iron oxide. The method of the invention does not use expensive organic additives, and the pore size distribution of the prepared macroporous iron oxide is uniform.

Description

technical field [0001] The invention belongs to the field of synthesis of porous inorganic materials, in particular to a macroporous iron oxide and a preparation method thereof. Background technique [0002] Iron oxide is a cheap, easy-to-obtain, green and environmentally friendly functional material, which has broad application prospects in many fields such as catalysis, magnetic equipment, sensors, environmental protection, medical diagnosis and treatment, water purification and pollution treatment. [0003] CN102260542 discloses a method for preparing a three-dimensional ordered macroporous iron oxide desulfurizer. The patent adopts a colloidal crystal template method to prepare macroporous materials, uses polystyrene microsphere colloidal crystal templates as macroporous templates, and then fills the precursor in In the gaps of the template, the template is finally removed to obtain a three-dimensional ordered macroporous iron oxide. However, template assembly is time-c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06
Inventor 范峰凌凤香张会成王少军杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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