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Preparation method and application of magnetic 5A molecular sieve

A molecular sieve and magnetic technology, which is applied in the field of preparation of magnetic 5A molecular sieves, to achieve the effect of uniform particle size, high crystallinity and regular crystal morphology

Inactive Publication Date: 2017-11-03
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the current research status, there are few reports on the preparation of magnetic 5A molecular sieves, their heavy metal ion exchange adsorption properties and magnetic separation and recovery effects.

Method used

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  • Preparation method and application of magnetic 5A molecular sieve
  • Preparation method and application of magnetic 5A molecular sieve
  • Preparation method and application of magnetic 5A molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of magnetic 5A molecular sieves in this embodiment comprises the following steps:

[0032] Step 1, FeCl 2 4H 2 O and FeCl 3 ·6H 2 O added to distilled water, FeCl 2 4H 2 O, FeCl 3 ·6H 2 The amount of O and distilled water added is 25g FeCl per liter of distilled water 2 4H 2 O, add 62.5g FeCl 3 ·6H 2 O; under the condition of nitrogen protection, the reaction was carried out in ultrasonic wave, and the temperature was raised to 75 °C at the same time, and NH was added after constant temperature 3 ·H 2 O (add 125 mL NH per liter of distilled water 3 ·H 2 (2) to obtain a solid-liquid mixture after continuing to react for 20min, after the natural cooling of the solid-liquid mixture, utilize a magnet to adsorb the magnetic substance in the solid-liquid mixture, and then repeatedly wash the magnetic substance obtained by adsorption, at a temperature of 65 After drying at ℃ for 5h, the magnetic Fe 3 o 4 ;

[0033] Step 2. Dissolve sodium metaa...

Embodiment 2

[0039] The preparation of magnetic 5A molecular sieves in this embodiment comprises the following steps:

[0040] Step 1, FeCl 2 4H 2 O and FeCl 3 ·6H 2 O added to distilled water, FeCl 2 4H 2 O, FeCl 3 ·6H 2 The amount of O and distilled water added is 18.75g FeCl per liter of distilled water 2 4H 2 O, add 56.25g FeCl 3 ·6H 2 O, under the condition of nitrogen protection, the reaction was carried out in ultrasonic wave, and the temperature was raised to 75 °C at the same time, and NH was added after constant temperature 3 ·H 2 O (add 125 mL NH per liter of distilled water 3 ·H 2 (0), continue to react for 20min to obtain a solid-liquid mixture, after the natural cooling of the solid-liquid mixture, utilize a magnet to adsorb the magnetic substance in the solid-liquid mixture, then repeatedly wash the magnetic substance obtained by adsorption, at a temperature of 65 After drying at ℃ for 5h, the magnetic Fe 3 o 4 ;

[0041] Step 2. Dissolve sodium metaaluminat...

Embodiment 3

[0046] The preparation of magnetic 5A molecular sieves in this embodiment comprises the following steps:

[0047] Step 1, FeCl 2 4H 2 O and FeCl 3 ·6H 2 O added to distilled water, FeCl 2 4H 2 O, FeCl 3 ·6H 2 The amount of O and distilled water added is 31.25g FeCl per liter of distilled water 2 4H 2 O, add 68.75g FeCl 3 ·6H 2 O; under the condition of nitrogen protection, the reaction was carried out in ultrasonic wave, and the temperature was raised to 85 °C at the same time, and NH was added after constant temperature 3 ·H 2 O (add 125 mL NH per liter of distilled water 3 ·H 2 (2) to obtain a solid-liquid mixture after continuing to react for 20min, after the natural cooling of the solid-liquid mixture, utilize a magnet to adsorb the magnetic substance in the solid-liquid mixture, and then repeatedly wash the magnetic substance obtained by adsorption, at a temperature of 75 After drying at ℃ for 5h, the magnetic Fe 3 o 4 ;

[0048]Step 2. Dissolve sodium me...

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Abstract

The invention discloses a preparation method and application of a magnetic 5A molecular sieve. The method comprises the steps of adding FeCl2.4H2O and FeCl3.6H2O into water, performing ultrasonic agitation and heating, then adding NH3.H2O to obtain a solid-liquid mixture, then performing magnetic adsorption, washing and drying to obtain magnetic Fe3O4; using sodium aluminate as an aluminum source, sodium silicate asa silicon source, sodium hydroxide as a base source and water as a solvent, adding calcium chloride, citric acid and the magnetic Fe3O4, and preparing the 5A molecular sieve inan ultrasound field. According to the preparation method and application provided by the invention, the magnetic 5A molecular sieve is prepared by usingultrasonic heating and adding an auxiliary agent, the magnetic molecular sieve has the advantages of high specific surface area, strong adsorption property, easinessin separation from the reaction liquid through additionally added magnetic field and the like. The synergistic effect of the ultrasonic wave and the auxiliary agent on the preparation of the magnetic 5A molecular sieve can increase the chemical reaction speed, save energy and protect the environment, and make the prepared magnetic 5A molecular sieve uniform in particle size and regular in morphology.

Description

technical field [0001] The invention belongs to the technical field of 5A molecular sieve preparation, and in particular relates to a preparation method and application of a magnetic 5A molecular sieve. Background technique [0002] 5A molecular sieve has excellent adsorption, ion exchange and catalytic properties. They also play a very important role in petrochemical industry. The effective pore diameter of 5A molecular sieve is 0.51 nanometers, and the critical diameter of n-alkane molecules is about 0.49 nanometers. Isoparaffins, naphthenes and aromatics are all above 0.55 nanometers, and since the effective pore size of the 5A molecular sieve is between the critical diameters of normal paraffin molecules and non-normal paraffin molecules, only normal paraffins It can enter the pores of 5A molecular sieve, so that n-alkanes can be separated from the mixture. A certain amount of magnetic particles are attached to the molecular sieve, and the magnetic separation technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/16B01J20/18B01J20/28B01J20/30C02F1/28
CPCB01J20/18B01J20/28009C01B39/16C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2006/12C02F1/281
Inventor 杨建利
Owner XIAN UNIV OF SCI & TECH
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