Method for preparing magnetic ZSM-5 zeolite from clay and red mud through micro-solvent process

A technology of ZSM-5 and clay, which is applied in the field of zeolite preparation, can solve problems such as difficult to meet actual needs and weak magnetic properties, and achieve the effects of avoiding the use of water and iron salts, strong magnetic properties, and reducing production costs

Active Publication Date: 2020-05-19
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Red mud is a kind of iron-containing aluminum plant waste, as well as silicon and aluminum components, so when adding fly ash, silica sol, steel slag (Microporous and Mesoporous Materials, 2015, 202, 208~216; FuelProcessing Technology, 2019, 189, 39~48; Microporous and Mesoporous Materials, 2018, 270, 24~29) After adjusting the silicon-aluminum ratio, the conventional hydrothermal method can also be used to prepare magnetic zeolite, but the magnetic properties of this zeolite are due to its The main components of iron oxides are hematite and goethite, resulting in weak magnetic properties and difficult to meet actual needs

Method used

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  • Method for preparing magnetic ZSM-5 zeolite from clay and red mud through micro-solvent process
  • Method for preparing magnetic ZSM-5 zeolite from clay and red mud through micro-solvent process
  • Method for preparing magnetic ZSM-5 zeolite from clay and red mud through micro-solvent process

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Experimental program
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Effect test

Embodiment approach 1

[0025] Disperse 20g of attapulgite in 80 ml of 3mol / L HCl solution, soak at 80°C for 48 h, filter, wash and dry to obtain acidified attapulgite; weigh 1.6g of acidified attapulgite, 0.16g of red mud, 0.4 g ammonium chloride, 0.2g tetrapropylammonium bromide were mixed and ground for 30min to obtain a powder, then 0.5g NaOH and 0.6g H were added to the powder 2 O prepared NaOH solution, stirred evenly to form a paste mixture, sealed and left to stand for 24 hours, then transferred to a sealed reaction kettle, crystallized at 180°C for 4 hours to obtain ZSM-5 zeolite crystals, cooled ZSM-5 zeolite crystals, added water to wash, and suction filtered , After drying, calcined at 550°C for 3 hours to obtain ZSM-5 zeolite, whose crystal form and morphology are as follows figure 1 and figure 2 Shown are ZSM-5 zeolite crystals.

Embodiment approach 2

[0027] Disperse 20g of attapulgite in 80 ml of 3mol / L HCl solution, soak at 80°C for 48 h, filter, wash and dry to obtain acidified attapulgite; weigh 1.6g of acidified attapulgite, 0.28g of red mud, 0.4 G sodium chloride, 0.3g tetrapropylammonium bromide were mixed and ground for 30min to obtain a powder, then 0.6g NaOH and 0.8g H were added to the powder 2 O prepared NaOH solution, stirred evenly to form a paste mixture, sealed and allowed to stand for 24 hours, then transferred to a sealed reaction kettle, crystallized at 180°C for 12 hours to obtain ZSM-5 zeolite crystals, cooled ZSM-5 zeolite crystals, washed with water, and suction filtered , After drying, calcined at 550°C for 3 hours to obtain ZSM-5 zeolite.

Embodiment approach 3

[0029] Disperse 20g of attapulgite in 80 ml of 3mol / L HCl solution, soak at 80°C for 48 h, filter, wash and dry to obtain acidified attapulgite; weigh 1.6g of acidified attapulgite, 0.4g of red mud, 0.4 g ammonium chloride, 0.4g tetrapropylammonium bromide were mixed and ground for 30min to obtain a powder, then 0.6g NaOH and 1g H were added to the powder 2 O prepared NaOH solution, stirred evenly to form a paste mixture, sealed and left to stand for 24 hours, then transferred to a sealed reaction kettle, crystallized at 180°C for 24 hours to obtain ZSM-5 zeolite crystals, cooled ZSM-5 zeolite crystals, washed with water, and suction filtered , After drying, calcined at 550°C for 3 hours to obtain ZSM-5 zeolite.

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Abstract

The invention relates to the technical field of zeolite preparation, and discloses a method for preparing magnetic ZSM-5 zeolite from clay and red mud through a micro-solvent process. The method comprises the following steps: mixing acidified clay, red mud, chloride and tetrapropylammonium bromide, grinding the formed mixture into powder, adding a NaOH solution into the powder, and carrying out stirring to form a paste mixture; sealing the paste mixture, carrying out standing, and transferring the paste mixture into a sealed reaction kettle for crystallization to obtain ZSM-5 zeolite crystals;washing, drying and calcining the ZSM-5 zeolite crystals to remove a template agent; and carrying out heating to 600-700 DEG C, introducing nitrogen for 1 hour, then introducing hydrogen for 1-2 hours, and reducing the red mud iron-containing oxide to obtain the strong magnetic ZSM-5 zeolite. According to the method, the natural clay and the solid waste red mud are used as raw materials, chlorideis used as a mineralizing agent, sodium hydroxide is used as an alkalinity regulator, and the strong magnetic ZSM-5 zeolite is prepared by using the micro-solvent process, so the use of a large amount of solvents and ferric salts is avoided, subsequent treatment procedures are reduced, and the method is economic and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of zeolite preparation, in particular to a method for preparing magnetic ZSM-5 zeolite by using clay and red mud as raw materials and microsolvents. Background technique [0002] ZSM-5 zeolite is an inorganic crystalline material with regular pores, which has excellent adsorption and catalytic performance, and has a wide range of applications in the field of adsorption and catalysis. ZSM-5 zeolite is usually synthesized from sodium silicate, tetraethyl orthosilicate, sodium aluminate and other materials, and is synthesized under hydrothermal conditions by using a template agent. The ZSM-5 zeolite synthesized by this method has high crystallinity and excellent performance, but the raw material is expensive, and the waste water needs to be treated after the product is separated. [0003] In order to reduce costs and reduce the use of solvents, some minerals containing silicon and aluminum such as illite (Micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/40C01G49/08
CPCC01B39/40C01G49/08C01P2002/72C01P2004/03C01P2004/80C01P2006/42
Inventor 蒋文彬邹韵琴张永红韦星王佳佳周凯王璐瑶蒋金龙吴妹谷亚昕
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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