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Pyrolysis 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 small pore volume, large bulk density, insufficient propylene yield, etc., and achieve high conversion rate and high activity of heavy oil. , the effect of high propylene yield

Active Publication Date: 2011-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is used for the conversion of calcium-containing raw materials, and the propylene yield is not high enough
[0005] USP4022714 and USP4107088 disclose a catalytic cracking catalyst prepared by titanium, zirconium, iron, cerium, boron modified sodium-containing silica sol and the preparation method, and the silica sol is modified by these metals to improve the specific surface and cracking of the fresh catalyst Active, but there are problems such as high packing density and small pore volume

Method used

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  • Pyrolysis catalyst and preparation method thereof
  • Pyrolysis catalyst and preparation method thereof
  • Pyrolysis catalyst and preparation method thereof

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preparation example Construction

[0011] In the preparation method of fluidized catalytic cracking catalyst provided by the present invention, zirconia is introduced twice, with ZrO 2 The amount of zirconia introduced for the first time is 2-10% of the total weight of the catalyst, and the amount of zirconia introduced for the second time accounts for 1-20% of the total weight of the prepared catalyst. Preferably, the weight ratio of the zirconia introduced for the first time to the zirconia introduced for the second time is (0.4-5):1. The zirconia powder is prepared by the following method: mixing an aqueous solution of zirconium salt with ammonia water, the amount of ammonia water is used so that the pH value of the obtained suspension is 9-12, then aging, filtering, washing, drying, and drying at 500-700 ℃ roasting to obtain zirconia powder. The aqueous solution of zirconium salt and ammonia water are mixed for reaction to form a suspension, and then aged for 10-48 hours. There is no special requirement fo...

example 1

[0053] (1) 20Kg decationized water is mixed with 11.9Kg pseudo-boehmite (industrial product of Shandong Aluminum Factory, solid content 63% by weight), beating, and its pH value is adjusted to 3 with hydrochloric acid to obtain acidified pseudo-boehmite slurry ;

[0054] (2) 5.19Kg of ZrOCl 2 (ZrO 2 Content 36% by weight, industrial grade, Zibo Huantuo Chemical Co., Ltd.) mixes with decationized water to obtain an aqueous solution with a concentration of 1mol / L, and then adds ammoniacal liquor (Beijing Chemical Plant, 25% by weight) to a pH value of 9 under stirring , and aged at 25°C for 26 hours under stirring, and filtered to obtain ZrO(OH) 2 Gel, washed with deionized water until no Cl was detected in the washing solution after washing - , dried at 120°C for 24 hours, and calcined at 550°C for 2 hours to obtain 1.86Kg of zirconia powder;

[0055] (3) Mix 0.4Kg of DASY2.0 molecular sieve, 2.6Kg of ZSP-3 molecular sieve with decationized water, beat for 15 minutes (slurr...

example 2

[0062] (1) 20Kg decationized water is mixed with 11.9Kg pseudo-boehmite (industrial product of Shandong Aluminum Factory, solid content 63m%), beating, and its pH value is 2.5 with hydrochloric acid adjustment;

[0063] (2) 15.45Kg ZrOCl 2 (Zirconium oxide content 36% by weight, industrial grade, Zibo Huantuo Chemical Co., Ltd.) to make a concentration of 1.5mol / L aqueous solution, then add ammonia (Beijing Chemical Plant, 25% by weight) under stirring to a pH of 9, Aged for 16 hours under stirring at 30°C, filtered to obtain ZrO(OH) 2 Gel, washed with deionized water until Cl-free in the washed water - Detected, dried at 115°C for 26 hours, and calcined at 600°C for 5 hours to obtain 5.56Kg of zirconia powder;

[0064] (3) Mix the decationized water with molecular sieves, and beat for 15 minutes to obtain 25Kg of molecular sieve slurry, (including 4.5kg of DASY2.0 molecular sieves, 3Kg of ZSP-3 molecular sieves, and the rest are water, all of which are from Sinopec catalyst...

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Abstract

The invention provides a pyrolysis catalyst and a preparation method thereof. The method comprises the following steps of: mixing molecular sieves, zirconium oxide powder and aluminium bonding agents, pulping, adding the zirconium oxide powder in pulp, pulping, regulating the pH value of the pulp with inorganic acid to be 2-5, and then spray drying, wherein the zirconium oxide powder is prepared by the following method comprising the steps of: mixing a zirconium salt water solution with ammonia water, ensuring that the quantity of the ammonia water is sufficient to regulate the pH value of a suspension to be 9-12, then ageing, filtering, washing, drying and baking at a temperature of 500-700DEG C. The catalyst prepared by the method has the advantages of good wear resistance, good crystallization degree and strong capability of resisting calcium pollution. When used for pyrolysis of calcium-containing hydrocarbon oil, the catalyst has high propylene yield.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Calcium in crude oil exists in part in the form of inorganic salts such as chloride, carbonate and sulfate, and a considerable amount exists in the form of non-porphyrin organic metal bonds, such as calcium naphthenate These organic calcium cannot be removed by common desalination methods (such as filtration and electric desalination). Calcium-containing oils are used for catalytic cracking, and the calcium in them can combine with the phosphorus in the phosphorus-containing catalyst to form calcium phosphate, which not only deteriorates the catalytic performance of the catalyst, reduces the yield of light oil in the device, but also causes the catalyst to agglomerate. Scaling of the smoke machine and cyclone will increase the consumption of the device, and even cause the device to stop working. In addition, other metals such as iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
Inventor 赵留周周治田辉平许昀刘宇键朱玉霞王振波唐立文任飞陈振宇杨青
Owner CHINA PETROLEUM & CHEM CORP
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