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Alumina carrier and preparation method thereof

An alumina carrier, alumina technology, applied in catalyst carriers, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as unsatisfactory stability, reduce the occurrence of side reactions, The effect of improving selectivity and improving pore structure

Active Publication Date: 2018-12-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the stability of the catalyst carrier prepared by the above method is still unsatisfactory and needs to be improved.

Method used

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  • Alumina carrier and preparation method thereof
  • Alumina carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of tungsten-doped lanthanum ferrite with micro-mesoporous

[0021] Under stirring conditions, 2.2mol La(NO 3 ) 3 Dissolve in 100mL water, add citric acid and stir to dissolve; then add 4.2mol Fe(NO 3 ) 3 , and then add 160g of sodium polyacrylate, then add an aqueous solution containing 10g of ammonium metatungstate, continue stirring for 30min, and obtain micro-mesoporous tungsten-doped lanthanum ferrite through drying, roasting and grinding.

[0022] 2. Preparation of alumina carrier

[0023] Add citric acid to 2.2g of micro-mesoporous tungsten-doped lanthanum ferrite for later use, add 300g of pseudo-boehmite powder and 20.0g of scallop powder into the kneader, mix well, then add nitric acid and 8g of sodium polyacrylate, Knead evenly, then add micro-mesoporous tungsten-doped lanthanum ferrite, mix evenly, and knead-extrude into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containin...

Embodiment 2

[0027] 1. Preparation of tungsten-doped lanthanum ferrite

[0028] Under stirring conditions, 2.2mol La(NO 3 ) 3 Dissolve in 100mL water, add citric acid and stir to dissolve; then add 4.2mol Fe(NO 3 ) 3 , then add an aqueous solution containing 10g of ammonium metatungstate, continue to stir for 30 minutes, and obtain tungsten-doped lanthanum ferrite through drying, roasting and grinding.

[0029] 2. Preparation of alumina carrier

[0030] Add citric acid to 2.2g of tungsten-doped lanthanum ferrite, add 300g of pseudoboehmite powder and 20.0g of scallop powder into the kneader, and mix well, then add nitric acid and 8g of sodium polyacrylate, knead evenly, and then Add tungsten-doped lanthanum ferrite, mix well, and knead-extrude into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain alumina carrier 2 containing tungsten-doped lanthanum ferrite. The carrier pore structure is shown in Table 1.

[0031] 3. Preparation of catalyst ...

Embodiment 3

[0034] The preparation of the carrier is the same as in Example 1, except that the micro-mesoporous tungsten-doped lanthanum ferrite accounts for 6 wt% of the carrier. The preparation of the catalyst is the same as in Example 1. The main composition of the catalyst 3 is: 78.8wt% alumina carrier of micro-mesoporous tungsten-doped lanthanum ferrite, 11.5wt% cobalt oxide, and 9.7wt% molybdenum oxide.

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Abstract

The invention discloses an alumina carrier and a preparation method thereof. The alumina carrier comprises 0.1-12 wt% of tungsten doped lanthanum ferrite. The mesopores of the carrier account for 1-85% of total pores, and macropores account for 1-70% of the total pores. The alumina carrier disclosed by the invention is excellent in thermal stability, can be applied to carriers of gasoline hydro-upgrading series catalysts, and can also be applied to diesel hydro-upgrading and other petrochemical engineering fields needing high-stability meso- / macroporous alumina carriers.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to an alumina carrier and a preparation method. Background technique [0002] Alumina supports are widely used in heterogeneous catalysts, catalyst supports and other fields. The thermal stability, hydrothermal stability, and anti-coking performance of carrier alumina are not ideal. Usually, additives are added for modification to improve carrier performance. [0003] There are many patented technologies for modified alumina carriers. CN201310429334.6 discloses a high-performance catalyst carrier and its preparation method, which is a catalyst carrier material for heterogeneous catalytic reactions. The main component of this high-performance catalyst carrier is a mixture of Al, Zr, Mg, Ti, and Si oxides, which is modified with rare earth elements or chromium. The preparation method includes the preparation of carrier particles and the modification of carrier particles. The prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J32/00B01J35/10C10G45/08C10G49/04
CPCC10G45/08C10G49/04B01J23/888C10G2300/1037C10G2300/202C10G2400/04C10G2400/02B01J35/638B01J35/615
Inventor 王廷海鲍晓军岳源源白正帅袁珮朱海波
Owner FUZHOU UNIV