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Hydrocracking catalyst as well as preparation method and application thereof

A hydrocracking and hydrofining reaction technology, applied in the field of catalysis, can solve the problems of low yield and selectivity of light aromatics, achieve high ring-opening activity, increase yield, and strengthen synergistic effects

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although a variety of catalysts for diesel hydrocracking have been disclosed, the yield and selectivity of diesel hydrocracking to produce light aromatics such as BTX are relatively low.

Method used

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  • Hydrocracking catalyst as well as preparation method and application thereof
  • Hydrocracking catalyst as well as preparation method and application thereof
  • Hydrocracking catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] Reagents, Instruments and Tests

[0063] Unless otherwise specified, the reagents used in the present invention are all analytically pure, and all reagents used are commercially available, for example, purchased from Bailingwei and Sinopharm Group.

[0064] In the following examples, preparation examples and comparative examples, the mesopore volume of molecular sieves is measured by nitrogen adsorption and desorption, and mesopores are molecular sieve channels with a diameter greater than 2 nanometers and less than 100 nanometers.

[0065] The specific measurement method is as follows: the AS-3 and AS-6 static nitrogen adsorption instruments produced by Quantachrome Instruments Co., Ltd. are used for measurement.

[0066] Test conditions: put the sample in the sample processing system, and evacuate to 1.33×10 at 300°C -2 Pa, heat preservation and pressure for 4h, and purify the sample. At the temperature of liquid nitrogen at -196°C, the adsorption and desorption of ...

preparation example 1

[0072] Preparation example 1 Preparation of molecular sieve Y1-1

[0073] 1) Use NaY zeolite as the raw material to perform the first ammonium exchange with ammonium sulfate solution. The treatment conditions are: according to the ratio of NaY molecular sieve (dry basis): ammonium sulfate: water = 1:0.9:10, exchange at 90°C for 2 hours, Then filter and dry at 120°C for 4h.

[0074] 2) The sample obtained in step 1) is calcined under 100% water vapor atmosphere, the calcining temperature is 500°C, and the calcining time is 2h.

[0075] 3) The molecular sieve obtained in step 2) is subjected to the second ammonium exchange according to the ratio of molecular sieve (dry basis): ammonium sulfate: water = 1:0.6:10, exchanged at 90° C. for 1 hour, and then filtered.

[0076]4) Perform the third ammonium exchange with the molecular sieve obtained in step 3) according to the ratio of molecular sieve (dry basis):ammonium sulfate:water=1:0.6:10, exchange at 90°C for 1h, and then filter...

preparation example 2

[0079] Preparation Example 2 Preparation of Molecular Sieve Y1-2

[0080] Molecular sieve Y1-2 was prepared by the same method as Preparation Example 1, except that the hydrothermal calcination temperature in step 2) was 550° C., and its physical and chemical properties are shown in Table 1.

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Abstract

The invention provides a hydrocracking catalyst as well as a preparation method and an application thereof. The hydrocracking catalyst comprises a carrier and an active metal component loaded on the carrier, the carrier comprises a matrix and a composite molecular sieve, the composite molecular sieve comprises a Y1 molecular sieve, a Y2 molecular sieve and a molecular sieve with an MFI structure, pores with the pore diameter larger than 2 nm and smaller than 100 nm on the Y1 molecular sieve account for less than 30% of the total pores, pores with the pore diameter of more than 2nm and less than 100nm on the Y2 molecular sieve account for 30-70% of the total pores, the ratio of the amount of the acid B of the Y1 molecular sieve per unit weight to the amount of the acid B of the Y2 molecular sieve per unit weight is 1.1: 1-4: 1, and the content of the molecular sieve with the MFI structure in the composite molecular sieve is 5-40%. The pore structure and the acid property of the catalyst are compositely regulated and controlled through the molecular sieve, so that the catalyst has high polycyclic aromatic hydrocarbon ring-opening activity, high alkyl aromatic hydrocarbon side chain breaking performance and high monocyclic aromatic hydrocarbon retention degree, and the yield of C6-C10 light aromatic hydrocarbon and C6-C8 light aromatic hydrocarbon can be increased in a polycyclic aromatic hydrocarbon hydrocracking reaction.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a hydrocracking catalyst and its preparation method and application. Background technique [0002] As crude oil becomes heavier and worse, and the application of catalytic cracking technologies such as improving gasoline quality or increasing propylene production, the quality of catalytic cracking diesel fractions is getting worse. It is characterized by high density, high nitrogen content, high aromatic content and low cetane number. At the same time, the pace of fuel oil quality upgrading is accelerating. For vehicle diesel, the requirements for indicators such as sulfur content, polycyclic aromatic hydrocarbon content and cetane number are becoming more and more stringent. Obviously, the composition characteristics of catalytic diesel, which accounts for one-third of my country's diesel pool, cannot meet the increasingly stringent fuel standards. On the other hand, with the adjustme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/48B01J29/16B01J35/10C10G47/20
CPCB01J29/80B01J29/48B01J29/166C10G47/20B01J35/394B01J35/61Y02P20/52
Inventor 杨平胡志海王轶凡董松涛许双辰
Owner CHINA PETROLEUM & CHEM CORP