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Hydrocarbon catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of equipment corrosion environment and pollution, and achieve the effect of increasing solid content, avoiding environmental pollution and low curing temperature

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 catalyst after spray drying because the aluminum sol contains a large amount of chlorine, which leads to equipment corrosion and The problem of environmental pollution still exists

Method used

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  • Hydrocarbon catalytic cracking catalyst and preparation method thereof
  • Hydrocarbon catalytic cracking catalyst and preparation method thereof
  • Hydrocarbon catalytic cracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This example illustrates the preparation of an aluminum phosphate sol binder for use with catalysts according to the invention.

[0056] 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

[0058] This example illustrates the preparation of an aluminum phosphate sol binder used in the catalyst of the present invention.

[0059] 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 40 minutes, add 2.3 kilograms of 90% phosphoric acid to the slurry under stirring, and continue stirring for 50 minutes to obtain a colorless and transparent aluminum phosphate sol with a pH of 1.7. After analysis, the aluminum phosphate sol contains P 7.9% by weight, Al 6.1% by weight, P / Al (weight)=1.3, HNO 3 The content is 14% by weight, and the sol viscosity (25° C.) is 56 mPa·s.

Embodiment 3

[0064] Add 1.28 kg of water to 1.21 kg (dry basis) of BETA molecular sieve, and homogenize with a shearing machine to prepare BETA molecular sieve slurry.

[0065]Under stirring, 1875g of kaolin and 2010ml of water were mixed and beaten for 30min, 1.2kg of the binder prepared according to the method in Example 1 was added to the kaolin slurry, and the stirring was continued for 1h, then the BETA molecular sieve slurry was added, stirred for 2h, and the resulting slurry was The solids content of the feed was 38% by weight. After the slurry was homogenized, it was spray-dried to obtain a catalyst containing 35% by weight of BETA molecular sieve, which was designated as C1. The composition, physicochemical properties and microreaction activity of the catalyst are shown in Table 2.

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Abstract

A hydrocarbon catalytic cracking catalyst is characterized in that in terms of 100wt% of the catalyst, the catalyst comprises 30-80wt% of molecular sieve and 10-65wt% clay; the catalyst comprises 5.0-20.0wt% of P calculated in the form of P2O5, and 0-1.0wt% of La2O3; P in the catalyst is provided by aluminium phosphate sol; and the aluminium phosphate sol adopted by the catalyst comprises 2-10wt%of AI and 5-15wt% of P, wherein the pH of the aluminium phosphate sol is 1.0-2.5, and the aluminium phosphate sol comprises 2-20wt% of P calculated in the form of HNO3. The prepared hydrocarbon catalytic cracking catalyst has great strength and high activity, can be used as an auxiliary to be mixed with a main catalyst, hardly reduces the activity of the main catalyst, can improve product distribution, has excellent selectivity for dry gas and coke, and meanwhile can improve the yield of light oil.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon catalytic cracking catalyst and a preparation method thereof, in particular to a hydrocarbon cracking catalyst containing high silicon-aluminum ratio molecular sieves with aluminum phosphate sol as a binder and a preparation method thereof. Background technique [0002] Catalytic cracking is an important process technology for the production of gasoline, diesel and liquefied gas in the oil refining industry, and catalyst or additive is one of its core technologies. Catalysts are usually prepared from various components other than active components, for example, catalytic active components Y type, ZSM-5 molecular sieve, clay, other inorganic oxides, etc. Phosphorus is often used to stabilize molecular sieves or improve catalysts abrasion resistance. Phosphorus-containing hydrocarbon cracking catalysts mainly contain the following three types: one is that the molecular sieve component of the catalyst is a...

Claims

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Application Information

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IPC IPC(8): B01J29/82C10G11/05C01B25/36
Inventor 庞新梅周志远高晓慧朴佳锐阎立军
Owner PETROCHINA CO LTD
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