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Molding method and application of molecular sieve adsorbent

A molding method and molecular sieve technology, applied in chemical instruments and methods, other chemical processes, silicates, etc., can solve the problems of low ball forming rate, rough surface, difficult operation, etc., and improve the pass rate and production efficiency , Excellent wear resistance and easy operation

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a molecular sieve adsorbent molding method and its And application, this method controls the addition amount and frequency of powder and water in the powdered long ball stage of rolling ball forming, and obtains an adsorbent with excellent particle size, sphericity and anti-wear performance, and the method is easy to operate, and the product The qualification rate and production efficiency are improved, and it is suitable for the preparation of various molecular sieve adsorbents formed by rolling balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Put 50-mesh seed balls into a rolling ball pot with a diameter of 1.2m. When the rolling ball pot is rotating at 60 rpm, add powder at a speed of 1.5kg / 10min, and use near-infrared technology to detect the inside of the rolling ball pot in real time. For the water content of the material, add water at 45°C intermittently, and control the water content of the material in the pot to 50wt%. During this process, intermittently add water to the rolling ball pot to keep the water content of the material in the pot at 45 wt%, and continue rolling the obtained pellets for 1.5 hours. The pellets were dried in a vibrating fluidized bed at 100°C for 1 hour, and then fired in a mesh belt furnace at 500°C for 3 hours to obtain shaped molecular sieve pellets.

Embodiment 2

[0061] Put 50-mesh seed balls into a rolling ball pot with a diameter of 1.2m. When the rolling ball pot is rotating at 60 rpm, add powder at a speed of 1.5kg / 10min, and use near-infrared technology to detect the inside of the rolling ball pot in real time. For the water content of the material, add water at 45°C intermittently, and control the water content of the material in the pot to 45wt%. During this process, intermittently add water to the rolling ball pot to keep the water content of the material in the pot at 40 wt%, and continue rolling the obtained pellets for 1.5 hours. The pellets were dried in a vibrating fluidized bed at 100°C for 1 hour, and then fired in a mesh belt furnace at 500°C for 3 hours to obtain shaped molecular sieve pellets.

Embodiment 3

[0063] Put 50-mesh seed balls into a rolling ball pot with a diameter of 1.2m. When the rolling ball pot is rotating at 60 rpm, add powder at a speed of 1.5kg / 10min, and use near-infrared technology to detect the inside of the rolling ball pot in real time. For the water content of the material, add water at 45°C intermittently, and control the water content of the material in the pot at 55wt%. During this process, intermittently add dewatered water into the rolling ball pot to keep the water content of the material in the pot at 50 wt%, and continue rolling the obtained pellets for 1.5 hours. The pellets were dried in a vibrating fluidized bed at 100°C for 1 hour, and then fired in a mesh belt furnace at 500°C for 3 hours to obtain shaped molecular sieve pellets.

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Abstract

The invention relates to the field of molecular sieve preparation, and discloses a forming method and application of a molecular sieve adsorbent. The method comprises the following steps: (1) adding a mixture of a molecular sieve and clay into a ball pot filled with seed balls in batches; (2) adding water into the rolling-ball pot, so that the water content W1 of the small balls in the rolling-ball pot is maintained at 30-60wt%; (3) when the small balls grow to the particle size R of 0.15-2 mm, stopping feeding, controlling water adding, so that the water content W2 of the small balls in the rolling ball pot is maintained at 30-60 wt%, and continuously rolling for 0.5-3 hours; and (4) drying and roasting the pellets to obtain the formed molecular sieve pellets. The method for preparing the adsorbent provided by the invention is convenient to operate, improves the product percent of pass and the production efficiency, and is suitable for preparing various molecular sieve adsorbents formed by rolling balls.

Description

technical field [0001] The invention relates to the field of molecular sieve preparation, in particular to a molding method and application of a molecular sieve adsorbent. Background technique [0002] Molecular sieve has a unique pore structure, but it is not suitable for direct use in chemical production because of its fine powder, difficult recovery and easy loss. Spherical adsorbents are widely used in adsorption separation due to their advantages of being easy to evenly fill into the reactor, strong selective adsorption, and large adsorption capacity. play a vital role. [0003] The preparation process of spherical particles mainly includes spray molding, oil column molding, and turning into balls. For example, CN104549553A discloses a method for preparing a spherical molecular sieve catalyst through oil column molding, which includes mixing the slurry obtained by aluminum sol, molecular sieve and organic amine through the oil column molding method, and then successiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30
CPCB01J20/16B01J20/12B01J20/3028
Inventor 陈鑫宇陈世华陈辉杜以村朱正宁
Owner CHINA PETROLEUM & CHEM CORP
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