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Macroporous iron oxide and its synthesis process

A synthesis process, iron oxide technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of uneven pore distribution of materials, long time-consuming template assembly, difficult industrial production, etc., to achieve uniform properties and low production costs Low, highly reproducible effects

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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  • Macroporous iron oxide and its synthesis process
  • Macroporous iron oxide and its synthesis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Dissolve 0.4 g of sodium hydroxide in 25 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 120°C for 30 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.

[0048] (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.

[0049] (3) Mix the Beta molecular sieve obtained in step (2) with 5mL of 0.45moL / L hydrochloric acid, put it into a closed reactor and treat it at 110°C for 5h, then wash the obtained product with distilled water until i...

Embodiment 2

[0056] (1) Dissolve 0.29 g of sodium hydroxide in 40 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 16.5 g of white carbon black slowly and 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 until neutral, and then dried at 120° C. for 12 hours to obtain a Beta molecular sieve.

[0057] (2) Put the Beta molecular sieve obtained in step (1) into 780 mL of 70wt% glycerol solution and let it settle naturally. Filter and dry at 120°C for 10h.

[0058] (3) Mix the Beta molecular sieve obtained in step (2) with 15mL of 1moL / L hydrochloric acid, put it into a closed reactor at 70°C for 8 hours, then wash the obtained product with distilled water until it is neutral, and then put it under the condition of 120°C Dry for 12 hours.

[0059] (4) Mix the Beta molecular sieve obtained in step (3) with 5...

Embodiment 3

[0065] (1) Dissolve 0.8 g of sodium hydroxide in 43 mL of 25 wt% TEAOH and 10 mL of distilled water, and stir for 30 min. Then add 1.02 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.

[0066] (2) Put the Beta molecular sieve obtained in step (1) into 20 mL of 13wt% propylene glycol solution, and let it 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.

[0067] (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 183°C for 2h, then wash the obtained product with distilled water until it is ...

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Abstract

The invention provides a macroporous iron oxide and a method for synthesizing the same. The iron oxide is composed of α-iron oxide and has two-stage pore channels, wherein the most probable pore size of mesopores is 3-8 nm; It is 50~1400nm. The synthesis method firstly pretreats Beta molecular sieve, then mixes Beta molecular sieve, ferric nitrate, sugars and water, stirs and ultrasonically treats, then performs drying treatment and high temperature treatment, and finally treats in alkaline solution to obtain macroporous iron oxide. The method of the invention does not use expensive organic additives, and the prepared macroporous iron oxide has a uniform pore size distribution.

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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