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Magnetic microporous-mesoporous molecular sieve fe for pyrolysis of waste tires 3 o 4 The preparation method of -ni-mcm-48

A technology of fe3o4-ni-mcm-48 and mesoporous molecular sieves, applied in the direction of molecular sieve catalysts, preparation of liquid hydrocarbon mixtures, chemical instruments and methods, etc., can solve problems such as poor thermal stability, difficult recovery, lack of active centers, etc., to achieve Solve the effect of poor thermal stability

Active Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of poor thermal stability, lack of active centers and difficult recovery of mesoporous material molecular sieve catalyst (water)

Method used

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  • Magnetic microporous-mesoporous molecular sieve fe for pyrolysis of waste tires <sub>3</sub> o <sub>4</sub> The preparation method of -ni-mcm-48
  • Magnetic microporous-mesoporous molecular sieve fe for pyrolysis of waste tires <sub>3</sub> o <sub>4</sub> The preparation method of -ni-mcm-48

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Magnetic Microporous-Mesoporous Molecular Sieve Fe for Pyrolysis of Waste Tires 3 o 4 -Ni-MCM-48 preparation method, concrete steps are as follows:

[0029] Step 1. Modified nano-Fe 3 o 4 Particle preparation: Weigh FeCl with a molar ratio of 1:2 2 4H 2 O and FeCl 3 ·6H 2O was dissolved in deionized water under the protection of nitrogen, so that FeCl 2 4H 2 O and FeCl 3 ·6H 2 The molar concentrations of O are 1 mol / L and 2 mol / L, respectively. After the dissolution is complete, adjust the pH to 10 with a 5mol / L NaOH aqueous solution, and stir vigorously in a water bath. After the mixture gradually changed from brown to black, the reaction was terminated, centrifuged, the supernatant was removed, and the precipitate was alternately washed with deionized water and absolute ethanol until neutral. Then add dropwise with FeCl 2 4H 2 Oleic acid with a molar ratio of 3:1, heated up to 60°C and continued to stir for 60 minutes, cooled to room temperature after st...

Embodiment 2

[0042] A Magnetic Microporous-Mesoporous Molecular Sieve Fe for Pyrolysis of Waste Tires 3 o 4 -Ni-MCM-48 preparation method, concrete steps are as follows:

[0043] Step 1. Modified nano-Fe 3 o 4 Particle preparation: Weigh FeCl with a molar ratio of 1:2 2 4H 2 O and FeCl 3 ·6H 2 O was dissolved in deionized water under the protection of nitrogen, so that FeCl 2 4H 2 O and FeCl 3 ·6H 2 The molar concentrations of O are 1 mol / L and 2 mol / L, respectively. After the dissolution is complete, adjust the pH to 11 with a 5mol / L NaOH aqueous solution, and stir vigorously in a water bath. After the mixture gradually changed from brown to black, the reaction was terminated, centrifuged, the supernatant was removed, and the precipitate was alternately washed with deionized water and absolute ethanol until neutral. Then add dropwise with FeCl 2 4H 2 Oleic acid with a molar ratio of 4:1, heated to 60°C and continued to stir for 60 minutes, cooled to room temperature after st...

Embodiment 3

[0056] A Magnetic Microporous-Mesoporous Molecular Sieve Fe for Pyrolysis of Waste Tires 3 o 4 -Ni-MCM-48 preparation method, concrete steps are as follows:

[0057] Step 1. Modified nano-Fe 3 o 4 Particle preparation: Weigh FeCl with a molar ratio of 1:2 2 4H 2 O and FeCl 3 ·6H 2 O was dissolved in deionized water under the protection of nitrogen, so that FeCl 2 4H 2 O and FeCl 3 ·6H 2 The molar concentrations of O are 1 mol / L and 2 mol / L, respectively. After the dissolution is complete, adjust the pH to 10.5 with a 5mol / L NaOH aqueous solution, and stir vigorously in a water bath. After the mixture gradually changed from brown to black, the reaction was terminated, centrifuged, the supernatant was removed, and the precipitate was alternately washed with deionized water and absolute ethanol until neutral. Then add dropwise with FeCl 2 4H 2 Oleic acid with a molar ratio of 3.5:1, heated to 60°C and continued to stir for 60 minutes, cooled to room temperature afte...

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Abstract

The invention belongs to the technical field of catalysis material synthesis, and relates to a preparation method of a magnetic microporous-mesoporous molecular sieve Fe3O4-Ni-MCM-48 for waste and oldtire pyrolysis. According to the method, a mesoporous template agent cetyl trimethyl ammonium bromide (CTAB) is used; tetraethoxysilane (TEOS) is used as a silicon source; modified Fe3O4 nanometer materials are used as magnetic particles to synthesize magnetic mesoporous molecular sieve Fe3O4-Ni-MCM-48 in a basic medium by a hydro-thermal synthesis method; then, a microporous template agent tetrapropylammonium hydroxide (TPAOH) is used for preparing the magnetic microporous-mesoporous molecular sieve Fe3O4-Ni-MCM-48. The problem that the microporous material molecular sieve catalyst has poor(hydrothermal) thermal stability, is lack of active centers and is difficult to recover can be solved.

Description

technical field [0001] The invention belongs to the technical field of catalytic material synthesis, and relates to a magnetic microporous-mesoporous molecular sieve Fe used for pyrolysis of waste tires 3 o 4 - Preparation method of Ni-MCM-48. Background technique [0002] Waste tire pyrolysis oil can be divided into light distillate (i.b.p.~200℃), middle distillate (200~350℃) and heavy distillate (>350℃). The content of heavy distillate is between 30% and 42.5%. It is composed of four components: aromatic hydrocarbons, aliphatic hydrocarbons, polar substances and asphaltenes. The molecular diameter of aromatic hydrocarbons and aliphatic hydrocarbons such as aromatic hydrocarbons and aliphatic hydrocarbons at 350-500 ° C in the heavy fraction is about 1.5 nm, and the hydrocarbons above 500 ° C Zeolite fractions are above 1.5nm, most of polar substances and asphaltenes have molecular diameters between 1.5nm and 5nm, and a small number of substances have molecular diamete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/072C10G1/10
CPCB01J29/072C10G1/10
Inventor 李爱民狄伟强
Owner DALIAN UNIV OF TECH
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