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A kind of preparation method of A-type molecular sieve that can remove pollutants

A technology for molecular sieves and pollutants, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, A-type crystalline aluminosilicate zeolite, etc.

Active Publication Date: 2020-01-21
北京格大环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, A-type molecular sieves do not have continuous adsorption capacity after adsorption saturation, and must be regenerated and desorbed before they can be used again.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a type A molecular sieve capable of removing pollutants, comprising the following process steps:

[0021] Step 1: Preparation of Zinc-Strontium Dispersion

[0022] 1.1 Take a 500mL beaker, add 220mL deionized water, 300mL 0.3mol / L strontium nitrate aqueous solution, 15g zinc chloride in sequence, and stir to form a transparent solution;

[0023] 1.2 Add 5g of ammonium acetate to the solution, stir to dissolve, then add 11g of sodium bicarbonate, and stir to form a transparent solution.

[0024] Step 2: Hydrothermal Film Deposition

[0025] 2.1 Pour the above solution into a stainless steel reaction kettle, and add 30g of A-type molecular sieve spherical particles with a diameter of 3mm;

[0026] 2.2 Seal the reactor, control the temperature in the reactor to 120°C and the pressure to 0.5MPa, react under these conditions for 35 hours, and cool to room temperature naturally;

[0027] 2.3 Filter the solid-liquid mixture in the reactor, and wash th...

Embodiment 2

[0033] A method for preparing a type A molecular sieve capable of removing pollutants, comprising the following process steps:

[0034] Step 1: Preparation of Zinc-Strontium Dispersion

[0035] 1.1 Take a 500mL beaker, add 235mL deionized water, 38mL 0.3mol / L strontium nitrate aqueous solution, 23g zinc chloride in sequence, and stir to form a transparent solution;

[0036] 1.2 Add 6g of ammonium acetate to the solution, stir to dissolve, then add 12g of sodium bicarbonate, and stir to form a transparent solution.

[0037] Step 2: Hydrothermal Film Deposition

[0038] 2.1 Pour the above solution into a stainless steel reaction kettle, and add 30g of A-type molecular sieve spherical particles with a diameter of 4mm;

[0039] 2.2 Seal the reactor, control the temperature in the reactor to 135°C and the pressure to 1MPa, react under these conditions for 35 hours, and cool to room temperature naturally;

[0040] 2.3 Filter the solid-liquid mixture in the reactor, and wash the o...

Embodiment 3

[0046] A method for preparing a type A molecular sieve capable of removing pollutants, comprising the following process steps:

[0047] Step 1: Preparation of Zinc-Strontium Dispersion

[0048] 1.1 Take a 500mL beaker, add 270mL deionized water, 50mL 0.3mol / L strontium nitrate aqueous solution, 33g zinc chloride in sequence, and stir to form a transparent solution;

[0049] 1.2 Add 7g of ammonium acetate to the solution, stir to dissolve, then add 13g of sodium bicarbonate, stir to form a transparent solution.

[0050] Step 2: Hydrothermal Film Deposition

[0051] 2.1 Pour the above solution into a stainless steel reaction kettle, and add 30g of A-type molecular sieve spherical particles with a diameter of 5mm;

[0052] 2.2 Seal the reactor, control the temperature in the reactor to 150°C and the pressure to 1.5MPa, react under these conditions for 35 hours, and cool to room temperature naturally;

[0053] 2.3 Filter the solid-liquid mixture in the reactor, and wash the obt...

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Abstract

The invention discloses a preparation method of an A-type molecular sieve capable of removing pollutants, and belongs to the field of environment purification function materials. The preparation method includes the process steps: preparing zinc strontium dispersion liquid by deionized water, strontium nitrate water solution, zinc chloride, ammonium acetate and sodium bicarbonate; performing hydrothermal film deposition on spherical particles of the A-type molecular sieve and the zinc strontium dispersion liquid in a stainless steel reactor, and then filtering and cleaning the materials; dryingthe spherical particles and then calcining the spherical particles for 2 hours at the temperature of 360-470 DEG C to prepare the A-type molecular sieve capable of removing the pollutants. The novelmaterial not only can adsorb the pollutants in an environment, but also can continuous decompose the pollutants and can be used for the removing process of various pollutants for a long time.

Description

technical field [0001] The invention belongs to the field of environmental purification functional materials, and in particular relates to a method for preparing a type A molecular sieve capable of removing pollutants. Background technique [0002] Type A molecular sieve is a kind of artificially synthesized hydrated aluminosilicate with the function of screening molecules. It has many pores with uniform apertures and neatly arranged pores in its structure. Molecular sieves with different apertures separate molecules of different sizes and shapes. It is a highly polar adsorbent, which has a strong adsorption effect on polar molecules and unsaturated organic molecules such as halogenated hydrocarbons, and has a higher selective adsorption advantage on molecules with high polarizability among non-polar molecules. It has high adsorption capacity, strong selectivity and high temperature resistance. It is widely used in organic chemical industry and petrochemical industry, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/14C02F1/28C02F1/30
CPCC01B39/026C01B39/14C02F1/281C02F1/30C02F2305/10
Inventor 张文杰韩铭张悦董英昊李昊伦
Owner 北京格大环境工程有限公司