Catalytic cracking 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 problems such as increased environmental protection pressure, increased ammonia nitrogen wastewater discharge, and increased post-treatment costs, reducing production costs and improving The effect of production efficiency

Active Publication Date: 2013-03-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the conversion rate of the fluidized cracking catalyst in the process of catalytic cracking of raw oil with high content of basic nitrogen compounds needs to be further improved; moreover, in the preparation process of the mesoporous silica-alumina material, the In the traditional ammonium exchange process, ammonium salts are mostly ammonium sulfate, ammonium chloride, ammonium nitrate, etc., and the proportion of ammonium salt used in the ammonium exchange process is relatively high, which increases the production cost of mesoporous silica-alumina materials to a certain extent At the same time, the discharge of ammonia nitrogen wastewater has also increased significantly, resulting in increased pressure on corporate environmental protection and increased post-treatment costs

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  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0025]Wherein, the preparation method of the first rare-earth-containing Y-type molecular sieve comprises: contacting the rare-earth-containing Y-type molecular sieve with silicon tetrachloride under stirring, the contact temperature is 100-500°C, and the contact time is 1-500°C. After 10 hours, the weight ratio of the rare earth-containing Y-type molecular sieve to silicon tetrachloride is 1:0.05-0.5;

[0026] The silicon-aluminum ratio of the second rare earth-containing Y-type molecular sieve is 5-30, and the initial unit cell constant is 2.430-2.460nm, based on the total amount of the second rare-earth-containing Y-type molecular sieve and calculated as an oxide The rare earth content is 10-20% by weight, the ratio of the equilibrium unit cell constant to the initial unit cell constant is at least 0.985, wherein, X-ray diffraction analysis of the molecular sieve has two diffraction peaks at 12.43±0.06° and 11.87±0.06° at 2θ Intensity ratio I 1 / I 2 Greater than 1;

[00...

Embodiment 1

[0078] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.

[0079] (1) Preparation of mesoporous silicon-aluminum materials

[0080] The concentration is 90g Al 2 o 3 / L Al 2 (SO 4 ) 3 solution and concentration is 102g Al 2 o 3 / L, NaAlO with a caustic ratio of 1.7 2 The solution is fed into the continuous gelling kettle in parallel, the effective volume of the gelling kettle is 200ml, Al 2 (SO 4 ) 3 The flow rate of the solution is 20ml / min, adjust NaAlO 2 The flow rate keeps the gelling pH value at 9, and the gelling temperature is 55°C; collect 300ml of the gelled slurry, and add 127ml of SiO with a content of 60g under stirring conditions 2 / L of water glass aqueous solution, heated to 80°C for aging for 4 hours, and then filtered.

[0081] The silicon-aluminum precipitate obtained after filtration is mixed with water at a weight ratio of 1:12 for beating, and then the hydrochloric acid solution is added into ...

Embodiment 2-7

[0085] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.

[0086] Prepare catalytic cracking catalysts according to the method of embodiment 1 respectively, difference is, in step (2), mesoporous silicon-aluminum material, kaolin, described first Y-type molecular sieve (S1) containing rare earth, described second Rare-earth-containing Y-type molecular sieve (S2), the third rare-earth-containing Y-type molecular sieve (S3), the MFI structure molecular sieve, pseudo-boehmite and aluminum sol on a dry basis, and the addition of rare earth chloride to The feeding amount of the rare earth oxide meter is shown in the following table 1 respectively, wherein, for the situation of using the embodiment of multiple molecular sieves, the multiple molecular sieves are mixed with other components in the form of mixed molecular sieve slurry; The rare earth solution is mixed with the slurries of other components and sprayed evenly after beat...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst comprises a cracking-active component, a mesoporous silica-alumina material, clay, and a binder. The preparation method of the mesoporous silica-alumina material comprises the steps that: a mesoporous silica-alumina material without ion exchange is mixed with water, and the mixture is beaten into slurry; and the obtained slurry contacts an inorganic acid under room temperature to 100 DEG C for at least 0.2h, such that the sodium oxide content in the mesoporous silica-alumina material is no higher than 0.2wt%, wherein a weight ratio of the mesoporous silica-alumina material without ion exchange to water to inorganic acid is 1:5-30:0.03-0.3. The cracking-active component comprises 90-100wt% of rare-earth-containing Y-type molecular sieve. During a catalytic cracking treatment process upon raw oil with relatively high basic nitrogen content, the catalytic cracking catalyst shows relatively high catalytic cracking activity, and assists in achieving relatively high conversion rate and especially relatively high gasoline yield.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method of the catalytic cracking catalyst. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts and are converted into high value-added products such as liquefied gas, gasoline, and diesel oil. In this process, it is usually necessary to use Catalytic material with high cracking activity. Microporous zeolite catalytic materials are widely used in petroleum refining and processing industries due to their excellent shape-selective catalytic performance and high cracking reactivity. With the depletion of petroleum resources and the requirements of environmental protection, especially the growing trend of crude oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J29/80C10G11/05
Inventor 朱玉霞罗一斌邓景辉欧阳颖王振波许明德郑金玉郭瑶庆
Owner CHINA PETROLEUM & CHEM CORP
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