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Heavy oil catalytic cracking catalyst

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low activity, small unit cell constant, heavy oil conversion ability to be improved, etc., to achieve high activity and rare earth utilization rate High, strong anti-heavy metal pollution effect

Active Publication Date: 2009-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Although the above patents precipitate rare earths to improve the utilization rate of rare earths, the unit cell constant is small and the activity is low after molecular sieve ultra-stable treatment. It is used for cracking catalysts, and the conversion capacity of heavy oil needs to be improved.

Method used

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preparation example Construction

[0023] According to catalyzer of the present invention, the preparation method of described REY molecular sieve comprises the steps:

[0024] (1) Contact NaY molecular sieve with a silicon-aluminum ratio ≥ 4.5 with an aqueous solution containing rare earth ions or with an aqueous solution containing rare earth ions and an aqueous solution containing aluminum ions, wherein, in terms of rare earth oxides, the ratio of rare earth ions to molecular sieve solids is preferred 0.12-0.30, more preferably 0.13-0.20, based on alumina, the ratio of aluminum ions to molecular sieve solids is 0-0.1, preferably 0-0.05, the liquid-solid ratio is 4-20, preferably 8-15, and the reaction temperature is 60- 95°C, the reaction time is 10-120min, and an alkaline aqueous solution precipitant is added to the reaction slurry;

[0025] (2) performing hydrothermal treatment on the filter cake product obtained in step (1), the condition is that the temperature is 450-800°C, the time is 0.5-4h, and the a...

Embodiment 1

[0044] Get 1500 grams of NaY molecular sieves (dry basis weight, produced by Sinopec Catalyst Qilu Branch, the same below), and after beating with 12 liters of deionized water, the addition concentration is 231g / l (in RE 2 o 3 meter) mixed RECl 3 Solution (provided by Sinopec Catalyst Qilu Branch, where La 2 o 3 52.5% by weight, CeO 2 Accounting for 46.5% by weight, Pr 2 o 5 0.6% by weight, Nd 2 o 3 Accounting for 0.4% by weight, hereinafter the same) 1059 milliliters, exchanged 0.5 hour at 80 ℃, then added 150 grams of ammonium bicarbonate (chemically pure, produced by Tianjin Nankai Chemical Factory, hereinafter the same), stirred at constant temperature for 0.5 hour, filtered and rinsed, and then The filter cake was calcined at 650° C. in a 100% water vapor atmosphere for 2 hours to obtain a molecular sieve dry powder. Take 1500 grams of this molecular sieve dry powder (dry basis weight), beat with 12 liters of deionized water, add 1500 grams of ammonium chloride (c...

Embodiment 2

[0047] The preparation method of molecular sieve is the same as embodiment 1, just in catalyst preparation process, the molecular sieve in embodiment 1 is replaced with V-1 molecular sieve 1000 grams (dry basis), DASY0.0 molecular sieve 320 grams (dry basis), the catalyst obtained, Recorded as C-2.

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PUM

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Abstract

The invention provides a catalytic cracking catalyst, comprising 10-50wt% of REY-typed molecular sieve, 10-40wt% of inorganic oxide adhesive and 10-70wt% of clay; wherein, the REY molecular sieve is prepared by the method as follows: NaY molecular sieve is contacted with water solution of rare earth ion or water solution of rare earth ion and solution of Al iron or colloid, and then contacted with additional precipitator so as to lead part rare earth to be deposited on the molecular sieve; subsequently, water heating disposal is carried out, finally, the deposition is contacted with ammonium solution; wherein, the precipitator is alkaline aqueous solution. The catalyst is used for hydrocarbon oil cracking, has strong heavy oil cracking capability, high gasoline yield and better Vr pollution resistance capability.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst. Background technique [0002] Catalytic cracking process is an important process of lightening heavy oil, and it is one of the main sources of economic benefits of each refinery. Due to limited resources, the feedstock for catalytic cracking has changed from traditional vacuum distillate oil to blended residue or pure residue feed. Residual oil not only contains macromolecular compounds such as colloid and asphaltene that are prone to coke, but also contains more heavy metals (such as nickel, vanadium, etc.). In the cracking reaction, metals such as nickel and vanadium are deposited on the catalyst, resulting in a decrease in catalyst activity, especially vanadium. Vanadium in a high oxidation state has strong mobility in a high-temperature hydrothermal environment, which seriously damages the structure of the active component molecular sieve in the catalyst. cause irreversible d...

Claims

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Application Information

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IPC IPC(8): B01J29/08C10G11/05
Inventor 任飞朱玉霞龙军罗一斌田辉平许明德唐立文邓景辉李明罡张久顺
Owner CHINA PETROLEUM & CHEM CORP
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