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Hydrocracking catalyst as well as preparation method and application thereof

A technology for hydrocracking and catalyst is applied in the field of catalysis to achieve the effect of improving yield and high yield

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

[0006] Although a variety of catalysts for diesel hydrocracking have been disclosed, the yield and selectivity of gasoline or light aromatics and the quality of gasoline in the diesel hydrocracking process still need to be further improved, so there is a demand for catalyst performance to improve

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
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Effect test

preparation example Construction

[0062] In the preparation method of the catalyst of the present invention, the carrier is made of a composite molecular sieve and a matrix, which can be made into various easy-to-operate moldings, such as microspheres, spheres, tablets or strips, etc., depending on different requirements. The forming can be carried out by conventional methods, for example, the compound molecular sieve (that is, the mixture of the first molecular sieve and the second molecular sieve) and the matrix are extruded and calcined. When the carrier is extruded, an appropriate amount of extrusion aid and / or adhesive can be added to the carrier, and then extruded. The type and amount of extrusion aids and peptizers are well known to those skilled in the art. For example, common extrusion aids can be selected from one or more of squash powder, methyl cellulose, starch, polyvinyl alcohol, and polyethanol. kind.

[0063] On the premise that it is sufficient to load the active metal component on the carrie...

Embodiment

[0100] Reagents, Instruments and Tests

[0101] In the following examples, preparation examples and comparative examples, the raw material specifications used are as follows:

[0102] NaY molecular sieve, industrial product, silicon-aluminum ratio > 4.7, crystallinity > 85%

[0103] Sulfuric acid, chemically pure

[0104] Hydrochloric acid, chemically pure

[0105] Nitric acid, chemically pure

[0106] Oxalic acid, solid, chemically pure

[0107] Fluorosilicate, technical grade

[0108] Ammonium nitrate, chemically pure

[0109] Ammonium chloride, chemically pure

[0110] Ammonium oxalate, chemically pure

[0111] Ammonium sulfate, chemically pure

[0112] Beta Molecular Sieve (Catalyst Changling Branch)

[0113] ZRP-5 Molecular Sieve (Catalyst Changling Branch)

[0114] In the following examples, preparation examples and comparative examples, involved instruments and test methods are as follows:

[0115] The unit cell constant is determined by X-ray diffraction (XR...

preparation example 1

[0122] The preparation of preparation example 1 molecular sieve Y-1

[0123](1) Use NaY zeolite as raw material to exchange with ammonium sulfate solution. The treatment conditions are: according to the ratio of NaY molecular sieve (dry basis): ammonium sulfate: water = 1:1.0:10, exchange at 90°C for 2h, filter and pass through Wash with deionized water and dry at 120°C for 4 hours.

[0124] (2) The molecular sieve obtained in the step (1) is subjected to the first hydrothermal calcination treatment, the calcination temperature is 520° C., and the calcination is carried out under 100% water vapor atmosphere for 2 hours.

[0125] (3) Molecular sieve obtained in step (2) is according to the ratio of molecular sieve (dry basis): sulfuric acid: ammonium chloride: water = 1: 0.06: 0.40: 9, first add water to beating the molecular sieve and slowly add concentration of 20% Sulfuric acid, control the dropping time for 30min, raise the temperature, treat at 70°C for 40min, filter, was...

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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 an acidic component, the acidic component comprises a first molecular sieve and a second molecular sieve, the first molecular sieve is a Y molecular sieve, and the cell constant of the Y molecular sieve is 2.415-2.440 nm; the ratio of the peak area of a resonance signal with chemical shift of 0 + / -2ppm in a 27Al MAS NMR spectrum of the Y molecular sieve to the total peak area is not more than 4%; the strong acid amount of the Y molecular sieve accounts for more than 70% of the total acid amount; wherein the micropore diameter of the second molecular sieve is smaller than that of the first molecular sieve. The hydrocracking catalyst has high aromatic hydrocarbon selective hydrogenation saturation activity, high naphthenic ring opening performance and high alkylbenzene side chain breaking performance, the yield of gasoline or light aromatic hydrocarbon can be increased, and the obtained gasoline is good in quality, high in heavy gasoline selectivity, few in light product and low in chemical hydrogen consumption.

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] In 2018, my country's oil refining capacity reached 831 million tons per year, with a surplus of about 90 million tons per year. At the same time, with the development of the economy, my country's oil consumption structure has also changed, and the growth rate of diesel demand has slowed down or even experienced negative growth. On the other hand, the quality requirements of oil products are becoming more and more stringent. Compared with the National V vehicle diesel standard, the upper limit of the content of polycyclic aromatic hydrocarbons in National VI diesel oil has been reduced from 11% to 7%. Therefore, the catalytic conversion of low-quality diesel fractions such as high aromatic content and low cetane number has received extensive attention. Based on the structural characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/48B01J29/16C10G47/20
CPCB01J29/80B01J29/48B01J29/166C10G47/20Y02P20/52
Inventor 杨平龙湘云胡志海王轶凡张毓莹
Owner CHINA PETROLEUM & CHEM CORP