Method for preparing rare earth-compounded Zr cross-linked montmorillonite material

A technology of rare earth compounding and montmorillonite, which is applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of irregular pore size distribution and poor thermal stability, and achieve uniform pore size and good thermal stability , The effect of improving the regularity of the pore size distribution

Inactive Publication Date: 2006-07-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the most commonly used cross-linking substance is polyhydroxy metal cation, but the clay material prepared by using this cross-linking substance has irregular pore size distribution and poor thermal stability, which limits its application.
However, doping rare earth elements in crosslinked clay to prepare rare earth composite Zr crosslinked montmorillonite materials has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Refer to the above preparation steps

[0020] ① Dissolve the raw material zirconium chloride with an appropriate amount of water to prepare a solution with a concentration of 1.0 mol / L, stir at 80°C for 4 hours, and age at room temperature for 184 hours to obtain a Zr crosslinking agent;

[0021] ②Dissolve lanthanum nitrate or cerium nitrate in appropriate amount of water, and mix with the solution described in ①. The molar ratio of the above substances is: La:Zr=1:10. Stir at 80°C for 4 hours, and at 60°C Aged for 32 hours.

[0022] ③ Prepare a montmorillonite suspension with a mass percentage of 1%.

[0023] ④At 65°C, under magnetic stirring conditions, slowly drop the mixed solution described in ② into the montmorillonite suspension solution described in ③, control the dropping time for 1-2 hours, and age for 3 hours at a constant temperature of 65°C , the solution was filtered to remove the solvent, and washed several times until there was no chloride ion.

[002...

Embodiment 2

[0026] A specific embodiment of the rare earth composite Zr cross-linked montmorillonite material, the steps are:

[0027] 1. Preparation of Zr crosslinking agent

[0028] According to the concentration of Zr content of 1.0mol / L, calculate and weigh zirconium chloride ZrOCl 2 89.06 g was dissolved in 280 ml of water, filtered, stirred at 80°C for 4 hours, and aged at room temperature for 184 hours to obtain a Zr crosslinking agent for use.

[0029] 2. Preparation of rare earth composite Zr crosslinked montmorillonite

[0030] 2.1 According to the molar ratio of rare earth elements La and Zr ions is 1:10, calculate and weigh 4.3296g LaNO 3 6H 2 O, measure 17.82ml of the Zr crosslinking agent described in ①, add 200ml of water to make a solution, stir at 80°C for 4 hours, and age at 60°C for 32 hours to obtain the La composite Zr crosslinking agent.

[0031] 2.2 Weigh 3.00g of montmorillonite, add 300ml of water, and make a suspension under the condition of magnetic stirrin...

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Abstract

The invention provides a process for preparing rare earth composite Zr cross-linked montmorillonite material, wherein rare-earth element-containing metallic nitrates such as cerous nitrate, lanthanum nitrate, praseodymium nitrate, zirconium chloride and montmorillonite are used as the raw materials. And the preparing process consists of Zr crosslinking and rare earth compounding. The obtained material has high specific surface area and good thermal stability.

Description

technical field [0001] The invention relates to a preparation method of a rare earth composite Zr crosslinked montmorillonite material which uses catalysis to eliminate VOCs. technical background [0002] Cross-linking clay (Cross-linking Clays, CLS) is a novel synthetic molecular sieve catalytic material. Since clay has expandability and ion exchange properties under the action of strong polar molecules, some large-volume cross-linking agents are introduced into its interlayer domains by means of ion exchange, so that they alternately form molecular-level pillars, which can be made into Novel molecular-level composite materials with regular pore size distribution and the ability to adsorb and transform organic macromolecules are expected to be widely used in the field of catalytic elimination of VOCs. The existing clay materials used for catalytic reactions are mainly composite clays prepared by adding cross-linking substances. The cross-linking substances used mainly incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44C01B33/40
Inventor 陈敏范利萍周仁贤
Owner ZHEJIANG UNIV
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