Preparation method of composite oxide

A composite oxide and solution technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of inhibiting large-scale application, difficult industrial application, poor material performance, etc., and achieve low stacking The effect of density, low cost and high catalytic performance

Inactive Publication Date: 2010-11-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have insurmountable drawbacks that inhibit the large-scale application of such materials in industry.
For example, the properties of the materials prepared by the first two methods are poor, and they need to be sintered at a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 7.7g Mg(NO 3 ) 2 ·6H 2 O, 22.5g Al(NO 3 ) 3 9H 2 O dissolved in 35ml H 2 O forms A liquid; 12g (NH 4 ) 2 CO 3 dissolved in 41ml H 2 O, forming liquid B. Liquids A and B were cooled to -28°C, then quickly mixed, stirred and ground, and the reaction liquid solidified rapidly to obtain a powdery substance. Place it at -28°C for 12 hours, then thaw the formed powder, add water to dissolve impurities, filter, dry at 110°C, and bake at 700°C for 2 hours to obtain MgAl with a perfect spinel crystal phase 2 o 4 powder. The bulk density of the material is 0.138g / ml, and the specific surface area is 326.5m 2 / g. Compared with other methods, (NH 4 ) 2 CO 3 The sample obtained by co-precipitation method is 66m 2 / g [Br.Ceram.Trans.J.91 volume, 77 pages], the sample obtained by dialkoxide hydrolysis method is 160m 2 / g [Chem. Mater. Vol. 8, p. 2850].

Embodiment 2

[0023] 4.3g La(NO 3 ) 3 ·6H 2 O, 2.3ml 50wt.% Mn(NO 3 ) 3 The solution was dissolved in 6ml H 2 O forms liquid A; 2.1g Na 2 CO 3 , 0.8g NaOH dissolved in 8ml H 2 O, forming liquid B. Liquids A and B were cooled to -23°C, then quickly mixed, stirred and ground, and the reaction liquid solidified rapidly to obtain a powdery substance. Place it in an environment of -23°C for 12h, then thaw the formed powder, add water to dissolve impurities, filter, dry at 110°C, and bake at 700°C for 2h to obtain LaMnO with a perfect perovskite crystal phase 3 powder. The specific surface of the material is 42.7m 2 / g.

Embodiment 3

[0025] 3.3g Ce(NO 3 ) 3 ·6H 2 O, 1.8g ZrOCl 2 dissolved in 7ml H 2 O forms liquid A; 6ml of 10mol / L ammonia water becomes liquid B. Liquids A and B were cooled to -34°C, then quickly mixed, stirred and ground, and the reaction liquid solidified rapidly to obtain a powdery substance. Place it in an environment of -34°C for 12h, then thaw the formed powder, add water to dissolve impurities, filter, dry at 110°C, and bake at 800°C for 2h to obtain Ce with a perfect crystal phase. 0.75 Zr 0.25 o 2 Solid solution, the specific surface is 97.5m 2 / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Bulk densityaaaaaaaaaa
Specific surfaceaaaaaaaaaa
Specific surfaceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a composite oxide. In the method, one or more of ammonium salt, magnesium salt, calcium salt, strontium salt, aluminum salt, lead salt, titanium salt, chromium salt, manganese salt, ferric salt, cobalt salt, nickel salt, copper salt, zinc salt, zirconium salt, silver salt, lanthanum salt and cerium salt are dissolved in water to form a solution A; and one or more of ammonia water, ammonium carbonate, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, sodium silicate and sodium aluminate are dissolved in water to form a solution B. The solution A and the solution B are quickly mixed, stirred and ground after being cooled, and water is solidified quickly in the process of generating sediments so as to form a powder with ice and the sediments highly dispersed. The powder is aged, washed, dried and baked to obtain target material. In the preparation process, liquid-solid phase transformation is quick so as to ensure high dispersion of different components, and the synthetic material has the advantages of high specific surface, low bulk density, high catalytic performance and the like. The method has the characteristics of simple operation and low cost, and is generally suitable for synthesizing a variety of composite oxides.

Description

technical field [0001] The invention relates to a preparation method of a composite oxide. Background technique [0002] Composite oxides with specific structures and compositions play a very important role in the fields of catalysis, materials, and energy. Composite oxides, due to the synergy between multiple components or the formation of a specific structure, often have properties that single-component oxides do not have in various physical and chemical properties. For example, MgAl 2 o 4 Spinel materials have unique mechanical and physical and chemical properties, and can be widely used as refractory materials, ceramic insulating materials, catalyst carriers, etc. ABOs 3 Type perovskite compounds have outstanding optical, electrical, magnetic, and catalytic properties. And Ce x Zr 1-x o 2 The material has a good ability to store and release oxygen, and has a good application prospect in the purification of automobile exhaust. [0003] The existing preparation me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J21/04B01J21/10B01J23/10B01J23/34B01J21/06B01J21/08B01J23/14B01J23/02B01J23/745B01J23/68B01J23/78B01J23/80B01J23/86B01J37/03B01J37/08
Inventor 王晓来邹国军许珊陈龙
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap