Aluminium phosphate sol used for catalyst and preparation method thereof

A technology of aluminum phosphate sol and catalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, catalytic cracking, etc., can solve problems such as pollution, equipment corrosion environment, etc., reduce the yield of gas and coke, and increase the yield of propylene , The effect of increasing the yield of light oil

Active Publication Date: 2011-05-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aluminum sol modified by this method improves the catalyst activity, it still inevitably contains chlorine in the slurry before spray drying and on the catal...

Method used

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  • Aluminium phosphate sol used for catalyst and preparation method thereof
  • Aluminium phosphate sol used for catalyst and preparation method thereof
  • Aluminium phosphate sol used for catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This example illustrates the preparation of an aluminum phosphate sol binder according to the invention.

[0042] 4.7 kg of pseudoboehmite (containing Al 2 o 3 3 kilograms) and 10.0 kilograms of decationized water beating for 30 minutes, under stirring, add 9.7 kilograms of 85% concentrated phosphoric acid in the slurry, then add 5.4 kilograms of 68% concentrated nitric acid, continue to stir and react for 45 minutes, and then obtain a colorless and transparent phosphoraluminum sol. Its pH is 1.5. After analysis, the aluminum phosphate sol contains 8.7% by weight of P, 5.3% by weight of Al, P / Al (weight)=1.6, HNO 3 The content is 12% by weight, and the sol viscosity (25° C.) is 40 mPa·s.

Embodiment 2

[0044] 3.0 kg of aluminum nitrate Al(NO 3 ) 3 ·6H 2 O adds 4.3 kilograms of decationized water to dissolve, adds 967 grams of pseudo-boehmite (containing Al 2 o 3 612 grams), beat for 20 minutes, add 2.1 kilograms of 90% phosphoric acid to the slurry under stirring, and continue stirring for 45 minutes to obtain a colorless and transparent aluminum phosphate sol with a pH of 1.5. After analysis, the aluminum phosphate sol contains P 7.6% by weight, Al 6.6% by weight, P / Al (weight)=1.15, HNO 3 The content is 14% by weight, and the sol viscosity (25° C.) is 600 mPa·s.

Embodiment 3

[0046] 1.36 kg of SB alumina powder (containing Al 2 o 3 1 kilogram) and 2.8 kilograms of decationized water beating for 40 minutes, under stirring, add 5.9 kilograms of 70% concentrated phosphoric acid in the slurry, then add 3.2 kilograms of 40% nitric acid, continue to stir and react for 45 minutes, and the colorless and transparent aluminum phosphate sol is obtained. The pH is 1.7. After analysis, the aluminum phosphate sol contains P 9.7% by weight, Al 4.0% by weight, P / Al (weight)=2.4, HNO 3 The content is 10% by weight, and the sol viscosity (25° C.) is 16 mPa·s.

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Abstract

The invention relates to a preparation method of aluminium phosphate sol used for a petroleum hydrocarbon cracking catalyst, which is characterized by comprising the steps of: mashing and dispersing an acid soluble aluminum precursor and decationed water into serous liquid with solid content of 15-35 percent, slowly adding phosphoric acid with concentration of 60-98 percent into the serous liquidunder the stirring according to the weight proportion of P/Al=1.0-2.5; then adding hydrogen nitrate with concentration of 40-98 percent according to the weight proportion of HNO3/Al2O3=0.2-2.0, rapidly reacting and releasing a large quantity of heat; and generating colorless transparent thick liquid after the reaction. The microactivity of the catalytic cracking catalyst prepared by adopting the aluminium phosphate sol bonder provided by the invention is remarkably improved. The selectivity of the aluminium phosphate sol is improved, the yields of gas and coke are remarkably reduced, and the yields of light oil and propylene are improved.

Description

technical field [0001] The invention relates to an aluminum phosphate 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 high molecular sieve content, aluminum sol with good bonding performance is often used as a binder. Usually aluminum sol refers to basic aluminum chloride, but the use of this aluminum sol brings some problems, that is, when it is used as a binder for cracking catalysts, due to the higher chlorine content, it will be damaged during the catalyst spray-drying molding process. A large amount of hydrochloric acid gas escapes, thereby corroding equipment and causing environmental pollution; if the catalyst is not dechlorinated after spray drying, the chlorine-containing catalyst is in the presence ...

Claims

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Application Information

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IPC IPC(8): C01B25/36B01J27/18C10G11/02
Inventor 庞新梅周志远高晓慧阎立军高雄厚
Owner PETROCHINA CO LTD
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