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A kind of macroporous iron oxide and its synthesis method

A synthesis method and iron oxide technology, applied in the directions of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of high preparation cost, poor physical and chemical properties, uneven pore distribution of materials, etc., and achieve uniform pore size distribution and concentrated pore size. The effect of high degree and low production cost

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.

Method used

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  • A kind of macroporous iron oxide and its synthesis method
  • A kind of macroporous iron oxide and its synthesis method

Examples

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Embodiment 1

[0045] (1) Dissolve 0.25 g of sodium hydroxide in 40 mL of 25 wt% TEAOH and 18 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 165°C for 50h. Then the obtained product was washed with distilled water until neutral, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve.

[0046] (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 10h.

[0047] (3) Mix the Beta molecular sieve obtained in step (2) with 5mL of 0.5moL / L hydrochloric acid, put it in a closed reactor and treat it at 100°C for 5h, then wash the obtained product with distilled water until it i...

Embodiment 2

[0054] (1) Dissolve 0.27 g of sodium hydroxide in 12 mL of 25wt% TEAOH and 20 mL of distilled water, and stir for 30 min. Then add 0.7 g of sodium aluminate and stir for 30 min. Add 17 g of white carbon black slowly and stir for 30 min. Then put it into a closed reactor and crystallize in an oven at 154°C for 20 h. Then the obtained product was washed with distilled water until neutral, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve.

[0055] (2) Put the Beta molecular sieve obtained in step (1) into 85 mL of 75wt% glycerol solution and allow it to settle naturally. When the molecular sieve has just settled to the bottom, take out 1 / 5 of the solution in the middle of the entire solution Filter and dry at 120°C for 10h.

[0056] (3) Mix the Beta molecular sieve obtained in step (2) with 15mL of 1moL / L hydrochloric acid, put it in a closed reactor and treat it at 60°C for 7h, then wash the obtained product with distilled water until it is neutral, and...

Embodiment 3

[0063] (1) Dissolve 0.88 g of sodium hydroxide in 40 mL of 25wt% 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 until neutral, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve.

[0064] (2) Put the Beta molecular sieve obtained in step (1) into 25 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.

[0065] (3) Mix the Beta molecular sieve obtained in step (2) with 5mL of 0.1moL / L hydrochloric acid, put it in a closed reactor and treat it at 172°C for 2h, then wash the obtained product with distilled water until it i...

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Abstract

The invention provides a macroporous iron oxide and a synthesis method thereof. The composition of the iron oxide is α-iron oxide, which has macropore channels, and the diameter of the macropores ranges from 50 to 1400 nm. The synthesis method firstly includes pretreatment of Beta molecular sieve; then mixing Beta molecular sieve, ferric nitrate and water, stirring and ultrasonic treatment; then performing drying treatment and high temperature treatment; finally treating in alkali 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 synthesis 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-con...

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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