Phosphorus-containing aluminium sol adhesive for catalyst and its prepn

An aluminum sol and cracking catalyst technology, applied in catalytic cracking, cracking, petroleum industry and other directions, can solve the problems of difficult realization, complicated preparation methods, and small reduction in chlorine content, and achieves reduction in gas and coke yields and product selection. The effect of improved performance and increased diesel yield

Inactive Publication Date: 2003-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also many shortcomings in using this phosphorus-containing aluminum sol as a binder.
One is that the preparation process of this binder requires steps such as high-temperature depolymerization and concentration, and the preparation method is relatively complicated; the other is that in order to ensure the stability and fluidity of the phosphorus-containing aluminum sol, the phosphorus content in the sol is limited. The P / Al (weight) ratio is lower than 0.25; the third is that compared with the aluminum sol, the chlorine content of this phosphorus-containing aluminum sol is reduced very little, and mainly relies on the use of chlorine-containing aluminum with a high Al / Cl (weight) ratio. Sol raw materials to improve its Al / Cl (weight) ratio, which is difficult to achieve industrially
As far as the present inventors know, there is no report of using chlorine-free phosphorus-containing aluminum sol in the preparation of molecular sieve type hydrocarbon cracking catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of the phosphorus-containing aluminum sol provided by the present invention comprises: beating and dispersing a kind of aluminum hydroxide or aluminum oxide that can be peptized by acid and decationized water into a slurry with a solid content of 15-35% by weight, and stirring it down to the Add concentrated phosphoric acid to the slurry according to the weight ratio of P / Al=1.2-6, then raise the temperature to 65-95°C, and react at this temperature for 15-90 minutes until it becomes a transparent colloid.

[0019] The alumina that can be peptized by acid in the preparation method of the phosphorus-containing aluminum sol provided by the present invention can be ρ-alumina, χ-alumina, η-alumina, γ-alumina, κ-alumina, One or more of δ-alumina and θ-alumina; the aluminum hydroxide that can be peptized by acid can be gibbsite, pyrenite, gibbsite, diaspore , Boehmite, pseudo-boehmite or one or more of them. The most preferred acid-peptizable aluminum ...

Embodiment 1

[0044] This example illustrates the preparation of a mixed binder used in the preparation of a phosphorus-containing aluminum sol and catalyst according to the present invention.

[0045] 5.8 kg of pseudoboehmite (containing Al 2 o 3 1.8 kg) and 4.0 kg of decationized water for beating for 30 minutes, add 9.6 kg of concentrated phosphoric acid to the slurry under stirring, heat up to 70°C, and then react at this temperature for 45 minutes to obtain a colorless and transparent phosphorous-containing aluminum sol. Its pH is 1.7. After analysis, the phosphorus-containing aluminum sol contains 14.7% by weight of P, 4.7% by weight of Al, and P / Al (weight)=3.1.

[0046] Preparation of mixed binder: mix the above-prepared phosphorus-aluminum glue and aluminum sol uniformly in different proportions to prepare mixed binders with different P / Al ratios and Al / Cl ratios.

Embodiment 2

[0048] This example illustrates the preparation of a mixed binder used in the preparation of a phosphorus-containing aluminum sol and catalyst according to the present invention.

[0049] 2.13 kg of SB powder (containing Al 2 o 3 1.6 kg) and 7.6 kg of decationized water for beating for 30 minutes, add 6.0 kg of concentrated phosphoric acid to the slurry under stirring, heat up to 80°C, and then react at this temperature for 45 minutes to obtain a colorless and transparent phosphorus-containing aluminum sol. Its pH is 1.9. After analysis, the phosphorus-containing aluminum sol contains 10.5% by weight of P, 5.0% by weight of Al, and P / Al (weight)=2.1.

[0050] Preparation of mixed binder: mix the above-prepared phosphorus-aluminum glue and aluminum sol uniformly in different proportions to prepare mixed binders with different P / Al ratios and Al / Cl ratios.

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Abstract

The present invention relates to a phosphorus and aluminum containing sol for petroleum hydrocarbon cracking catalyst and its features are containing Al 2-10 wt%, P 5-20 wt% and no Cl, with its P/Al ratio being 1.2-6 and pH value being 1.0-2.5. The preparation process includes beating aluminium hydroxide or alumina capable of being peptized and deionized water to obtain a slurry with solid content of 15-35 wt%, adding concentrated phosphoric acid according to the required P/Al ratio while stirring, heating to 65-95 deg. and reaction for 15-90 min until becoming transparent colloid. The said phosphorus and aluminum containing sol without C1 may be used together with conventional chlorine-containing aluminum sol.

Description

technical field [0001] The invention relates to a phosphorus-containing aluminum sol binder which can be used for petroleum hydrocarbon cracking catalysts and a preparation method thereof. Background technique [0002] Abrasion resistance is one of the important indicators to measure the performance of cracking catalysts. For this reason, in cracking catalysts of molecular sieve type, especially with high molecular sieve content, aluminum sol with better bonding performance is often used as a binder. However, the use of aluminum sol also brings some problems. When it is used as a binder for hydrocarbon cracking catalysts, due to the high chlorine content, a large amount of hydrochloric acid gas will escape during the catalyst spray drying molding process, thereby corroding equipment and Cause environmental pollution; if the dechlorination step is not carried out to the catalyst after spray drying, the hydrochloric acid gas formed will destroy the crystal lattice of the mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/02
Inventor 蒋文斌郑曼英陈蓓艳达志坚桂跃强黄轶唐立文杨青
Owner CHINA PETROLEUM & CHEM CORP
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