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Hydrocracking catalyst as well as preparation method and application thereof

A technology for hydrocracking and hydrorefining reactions, applied in the field of catalysis, can solve problems such as low gasoline yield and gasoline quality, and achieve the effects of strong reaction activity and increased yield

Pending 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 technologies and catalysts for diesel hydrocracking have been disclosed, the gasoline yield of this technology is still low and there is still room for improvement in gasoline quality

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

[0060] Reagents, Instruments and Tests

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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

[0070] The preparation of preparation example 1 molecular sieve Y1-1

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 fi...

preparation example 2

[0077] Preparation Example 2 Preparation of Molecular Sieve Y1-2

[0078] 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 molecular sieves, the molecular sieves comprise a Y1 molecular sieve and a Y2 molecular sieve, pores with the pore diameter larger than 2 nm and smaller than 100 nm in 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 more than 30% of the total pores, and 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. According to the catalyst disclosed by the invention, matching of a pore structure and an acid center of the catalyst can be effectively adjusted by compounding molecular sieves with different properties, and a synergistic effect of a hydrogenation function and a cracking function is enhanced, so that the catalyst has high polycyclic aromatic hydrocarbon ring-opening activity and high monocyclic aromatic hydrocarbon selectivity; and the yield of high-octane gasoline components or BTX products can be greatly increased in the diesel hydrocracking process.

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 impurity content, high aromatics content and low cetane number. At the same time, the pace of fuel oil quality upgrading is accelerating. The fuel oil standard implemented in 2019 stipulates that the upper limit of polycyclic aromatic hydrocarbons in diesel oil has been reduced from 11% to 7%, and the cost of processing catalytic cracking diesel oil to meet the requirements has increased. On the other hand, with the adjustment of economic structure, the demand structure of oil products has also changed. Since 2006, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/16B01J35/10C10G47/20
CPCB01J29/80B01J29/166C10G47/20B01J35/60
Inventor 杨平李明丰聂红王轶凡胡志海许双辰
Owner CHINA PETROLEUM & CHEM CORP