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Pyrolysis catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of insufficient propylene yield, large bulk density, small pore volume, etc., and achieve high propylene yield and activity. The effect of high, heavy oil conversion rate

Active Publication Date: 2013-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • 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 the fluidized catalytic cracking catalyst provided by the present invention, zirconia is introduced twice, and 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 is 1-20% of the total weight of the prepared catalyst. Preferably, the weight ratio of the first introduced zirconia to the second introduced zirconia is (0.4-5):1. The zirconium oxide powder is prepared by the following method: mixing an aqueous solution of zirconium salt with ammonia water, the amount of the ammonia water is such that the pH value of the obtained suspension is 9-12, and then aging, filtering, washing, drying, and drying at 500-700 calcined at °C to obtain zirconia powder. The aqueous solution of zirconium salt is mixed with ammonia water to react to form a suspension, and then the aging time is 10 to 48 hours. There is no special requirement for the agi...

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), making pulp, adjusting its pH value with hydrochloric acid to be 3, to obtain acidified pseudo-boehmite slurry ;

[0054] (2) 5.19Kg of ZrOCl 2 (ZrO 2 The content is 36% by weight, industrial grade, Zibo Huantuo Chemical Co., Ltd.) is mixed with decationized water to obtain an aqueous solution with a concentration of 1 mol / L, and then adds ammonia (Beijing Chemical Plant, 25% by weight) to pH 9 under stirring , and then aged at 25°C for 26 hours with 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 and 2.6Kg of ZSP-3 molecular sieve with decationized water, and beat for 15 minutes (the...

example 2

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

[0063] (2) 15.45Kg ZrOCl 2 (36% by weight of zirconia content, industrial grade, Zibo Huantuo Chemical Co., Ltd.) is made into an aqueous solution with a concentration of 1.5 mol / L, and then adds ammonia water (Beijing Chemical Factory, 25% by weight) to pH 9 under stirring, Aged at 30°C for 16 hours with stirring, filtered to give ZrO(OH) 2 Gel, washed with decationized water until the water after washing is free of Cl - It was detected that 5.56Kg of zirconia powder was obtained by drying at 115°C for 26 hours and calcining at 600°C for 5 hours;

[0064] (3) mixing decationized water and molecular sieve, beating, beating time 15 minutes, obtained molecular sieve slurry 25Kg, (including DASY2.0 molecular sieve 4.5kg, ZSP-3 molecular sieve 3Kg, t...

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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 the form of inorganic salts such as chlorides, carbonates and sulfates, and a considerable amount in the form of non-porphyrin organometallic bonds, such as calcium naphthenates. In the form of their homologues, these organic calcium cannot be removed by common desalination methods such as filtration and electrical desalination. The calcium-containing oil is used for catalytic cracking, and the calcium in it can combine with the phosphorus in the phosphorus-containing catalyst to form calcium phosphate, which not only makes the catalytic performance of the catalyst worse, the light oil yield of the device decreases, but also leads to the agglomeration of the catalyst. The hood and cyclone are fouled, the agent consumption of the device increases, and even the device is shut down. In addition, other meta...

Claims

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Application Information

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Patent Type & Authority Patents(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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