Hydrocracking catalyst as well as preparation method and application thereof

A hydrocracking and catalyst technology, applied in the field of catalysis, can solve the problems of low yield of light aromatics BTX, low yield of gasoline fractions, low RON, etc., and achieve the effects of low chemical hydrogen consumption, less light products, and increased proportion

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

[0006] Although a variety of catalysts for diesel hydrocracking have been disclosed at present, the following problems still exist in the currently reported technologies: low gasoline fraction yield, low RON, low yield of light aromatics BTX, etc. Catalyst properties still need to be optimized to increase activity and selectivity for desired reactions

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

Examples

Experimental program
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preparation example Construction

[0060] Specifically, the preparation method of Y molecular sieve of the present invention may comprise the following steps:

[0061] Mix NaY molecular sieve with ammonium salt and water for the first ammonium exchange treatment to obtain the first ammonium exchange molecular sieve;

[0062] The first ammonium-exchanged molecular sieve is subjected to the first hydrothermal roasting treatment in a water vapor atmosphere to obtain the first water-baked molecular sieve;

[0063] mixing the first water-baked molecular sieve with water and adding the first dealumination agent to carry out the first dealumination treatment to obtain the first dealumination molecular sieve;

[0064] The first dealuminated molecular sieve is subjected to a second hydrothermal roasting treatment in a water vapor atmosphere to obtain a second hydrobaked molecular sieve;

[0065] mixing the second water-baked molecular sieve with water and adding a second dealumination agent for second dealumination tre...

Embodiment

[0093] Reagents, Instruments and Tests

[0094] In the following examples, preparation examples and comparative examples, the raw material specifications used are as follows:

[0095] NaY molecular sieve, industrial product, silicon-aluminum ratio > 4.7, crystallinity > 85%

[0096] Sulfuric acid, chemically pure

[0097] Hydrochloric acid, chemically pure

[0098] Nitric acid, chemically pure

[0099] Oxalic acid, solid, chemically pure

[0100] Fluorosilicate, technical grade

[0101] Ammonium nitrate, chemically pure

[0102] Ammonium chloride, chemically pure

[0103] Ammonium oxalate, chemically pure

[0104] Ammonium sulfate, chemically pure

[0105] In the following examples, preparation examples and comparative examples, involved instruments and test methods are as follows:

[0106] The unit cell constant is determined by X-ray diffraction (XRD) using RIPP145-90 standard method (see "Petrochemical Analysis Method (RIPP Test Method)", Yang Cuiding, etc., Scienc...

preparation example 1

[0113] The preparation of preparation example 1 molecular sieve Y-1

[0114] (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.

[0115] (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.

[0116] (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, wa...

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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 Y molecular sieve, and the hydrocracking catalyst comprises 1-10 wt% of a group VIII metal component and 2-40 wt% of a group VIB metal component in terms of oxide on the basis of the hydrocracking catalyst; the content of the Y molecular sieve in the carrier is 30-90 wt%, and the content of the matrix is 10-70 wt%; wherein the unit cell constant of the Y molecular sieve is 2.415 to 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%; and the strong acid amount of the Y molecular sieve accounts for 70% or above of the total acid amount. The hydrocracking catalyst is used for catalyzing diesel hydrocracking to produce gasoline or light aromatic hydrocarbon, and has the characteristics of high yield, good selectivity, high gasoline octane number and the like of ideal products such as gasoline or light aromatic hydrocarbon.

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 recent years, with the development of my country's economy, the demand structure of oil products has changed. The demand for gasoline and aviation fuel has increased, and the growth rate of diesel demand has decreased or even experienced negative growth. Since 2006, the ratio of diesel to gasoline consumed in my country has gradually decreased. On the other hand, with the enhancement of people's awareness of environmental protection, the quality requirements of oil products are becoming more and more stringent. From 2015 to 2019, the fuel oil standard was upgraded from National IV to National VI. For diesel, the significant changes are sulfur content, ten The requirements for indicators such as hexane number and polycyclic aromatic hydrocarbons are becoming increasingly stringent. Specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J35/10C10G47/20
CPCB01J29/166B01J35/1023C10G47/20
Inventor 杨平庄立聂红胡志海王轶凡张毓莹
Owner CHINA PETROLEUM & CHEM CORP
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