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Hydro-upgrading catalyst as well as preparation method and application thereof

A hydrogenation modification and catalyst technology, applied in the field of catalysis

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 hydro-upgrading have been disclosed at present, the yield of diesel oil and the cetane number of diesel oil in the process of diesel hydro-upgrading still need to be further improved, so it is necessary to improve the performance of the catalyst

Method used

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  • Hydro-upgrading catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

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

[0092] Reagents, Instruments and Tests

[0093] In the following examples, preparation examples and comparative examples, the raw material specifications used are as follows:

[0094] NaY molecular sieve, industrial product, silicon-aluminum ratio > 4.7, crystallinity > 85%

[0095] Sulfuric acid, chemically pure

[0096] Hydrochloric acid, chemically pure

[0097] Nitric acid, chemically pure

[0098] Oxalic acid, solid, chemically pure

[0099] Fluorosilicate, technical grade

[0100] Ammonium nitrate, chemically pure

[0101] Ammonium chloride, chemically pure

[0102] Ammonium oxalate, chemically pure

[0103] Ammonium sulfate, chemically pure

[0104] In the following examples, preparation examples and comparative examples, involved instruments and test methods are as follows:

[0105] 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

[0112] The preparation of preparation example 1 molecular sieve Y-1

[0113] (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.

[0114] (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.

[0115] (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 hydro-upgrading catalyst as well as a preparation method and an application thereof. The hydro-upgrading 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 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%; and the strong acid amount of the Y molecular sieve accounts for 70% or above of the total acid amount. According to the hydro-upgrading catalyst, the Y molecular sieve with high silica-alumina ratio, less non-framework aluminum, large specific surface area, rich secondary pores and high strong acid center proportion is used, so that the polycyclic aromatic hydrocarbon hydrogenation saturation and ring opening performance of the catalyst is enhanced, and the aromatic hydrocarbon selective hydrogenation ring opening of the catalyst is high and good in selectivity; and the cetane number of the diesel oil can be remarkably increased while the high diesel oil yield is maintained in the hydro-upgrading process of the inferior diesel oil.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a hydrogenation upgrading catalyst and its application. Background technique [0002] As crude oil becomes heavier and inferior, and the application of catalytic cracking technologies such as improving gasoline quality or increasing propylene production, the quality of secondary processed diesel fractions such as catalytic cracking diesel and coking diesel is increasingly deteriorating. It is characterized by high density, high nitrogen content, high aromatic content and low cetane number. On the other hand, the pace of upgrading the quality of refined oil has accelerated, and it is required that from January 1, 2019, the country will be fully supplied with National VI diesel oil and general diesel will be cancelled. Increasing the cetane number and reducing the content of aromatics is the key to realize the merger of vehicles and common rails. For secondary processed diesel with poor ...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J35/10C10G49/08
CPCB01J29/166C10G49/08B01J35/617
Inventor 杨平庄立李明丰胡志海王轶凡任亮
Owner CHINA PETROLEUM & CHEM CORP
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