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Cerium-titanium solid solution and its preparing method

A solid solution, cerium-titanium technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems affecting products, complexity, etc.

Inactive Publication Date: 2005-01-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above studies show that Ce-Ti can form many kinds of compounds, but the reaction conditions and the ratio of Ce-Ti will affect the final product, which is a very complicated system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] CeTi 2 o 6 Solid solution and preparation method thereof, the steps are:

[0012] (1) CeTi 2 o 6 Solid solution, its chemical formula is CeTi 2 o 6 . It is based on cerium nitrate (Ce(NO3 ) 3 ·6H 2 O) and titanium tetrachloride (TiCl 4 ) The precursor of the solution is used as a raw material, and it is uniformly mixed with a suitable ratio (Ce x Ti 1-x o 2 , where x=0.1-1.0), then by the ratio of Ce:Ti, Ce=x(x=0.3), the molar ratio of Ti=1-x(0.7) is calculated and measures corresponding cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and carbon tetrachloride (TiCl 4 ) amount to make it evenly mixed.

[0013] (2) Add 40ml of concentrated ammonia water into a 250ml beaker, then transfer the uniformly mixed cerium-titanium raw material solution into a separatory funnel, drop the cerium-titanium raw material solution into the concentrated ammonia water at a certain speed, and stir rapidly at the same time to make The precipitation is complete (pH value = 10.0-11.0), a...

Embodiment 2

[0016] (1) CeTi 2 o 6 Solid solution, its chemical formula is CeTi 2 o 6 . It is based on cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and titanium tetrachloride (TiCl 4 ) The precursor of the solution is used as a raw material, and it is uniformly mixed with a suitable ratio (Ce x Ti 1-x o 2 , wherein x=0.1-1.0), then by the ratio of Ce:Ti, Ce=x(x=0.3), the molar ratio of Ti=1-x(0.7) is calculated and measured concentration is the cerium nitrate of 0.5mol / L (Ce(NO 3 ) 3 ·6H 2 O) solution 30ml, and concentration is the carbon tetrachloride (TiCl 4 ) solution 105ml, make it mix evenly.

[0017] (2) Add 40ml of concentrated ammonia water in a 250ml beaker, then transfer the uniformly mixed cerium-titanium raw material solution into the separatory funnel, add the cerium-titanium raw material solution dropwise to the concentrated ammoniacal water at a rate of 60 drops / min, and simultaneously Stir rapidly to make the precipitation complete (pH value = 10.0-11.0), age at room...

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Abstract

The invention provides a CeTi#-[2]O#-[6] solid solution and its preparing method. The molecular formula is CeTi#-[2]O#-[6]. The process includes the following steps : the precursor of the cerous nitrate and titanium tetrachloride solution is served as raw material, the raw material is mixed and added into strong aqua ammonia, after depositing, aging, centrifuge washing, washing away Cl#+[-], vacuum freeze drying and baking, CeO#-[2]-TiO#-[2] powder is obtained, CeO#-[2]-TiO#-[2] powder is roasted at 650,750 and 800 degrees C., and crystallization of CeTi#-[2]O#-[6] is finished.The invention is suitable for removing NO#-[x] and SO#-[x] catalyst carrier.

Description

technical field [0001] The present invention relates to a kind of and single CeO 2 Compared with CeTi, which has higher stability, oxidation-reduction and good low-temperature activity 2 o 6 Solid solutions and methods for their preparation. Background technique [0002] In the practical application of catalytic removal of nitrogen-containing and sulfur-containing industrial waste gas, the main active component on the catalyst is ceria (CeO 2 ) is easy to sinter when the temperature is as high as 750 °C. Therefore, in the actual application process, it is often necessary to add some anti-sintering oxides to make composite oxides or solid solutions (such as CeO 2 -ZrO 2 ); in containing CeO 2 -MOx in solid solution, CeO 2 After some Ce atoms in the lattice are replaced by other cations, it will cause CeO 2 lattice distortions and defects. Therefore, with CeO 2 -MOx solid solution than single CeO 2 It has higher stability, oxidation-reduction and good low-temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J37/03
Inventor 蒋晓原楼莉萍陈英旭郑小明
Owner ZHEJIANG UNIV
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