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Hydrocracking catalyst, preparation method and application thereof

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of increasing demand for low-freezing point clean diesel, poor raw material adaptability, and high reaction temperature, and achieve excellent The effect of hydrodewaxing performance, excellent properties and high aromatic potential

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the raw material Y-type zeolite has been modified, it is used in medium-oil hydrocracking catalysts, which have relatively good activity and medium-oil selectivity, but one disadvantage of this catalyst is that it handles wax-based raw When cracked into light components, the obtained diesel oil has a higher freezing point, but the market demand for clean diesel oil with a low freezing point is increasing, especially in regions with colder winters
Although this catalyst can also be used as a medium-oil type hydrocracking catalyst, due to the characteristics of the β zeolite used, the content range of β zeolite in the medium-oil type catalyst is generally limited to 2.5w%-10w%, and generally must be used in conjunction with A dispersed in γ-Al 2 o 3 Such as silica-alumina on a macroporous alumina substrate, the medium-oil catalyst involved in this patent has to lower the activity in order to ensure the selectivity of medium-oil, so that the reaction temperature is relatively high, generally above 390 ° C, which leads to poor raw material adaptability

Method used

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  • Hydrocracking catalyst, preparation method and application thereof
  • Hydrocracking catalyst, preparation method and application thereof
  • Hydrocracking catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Tetraethylammonium hydroxide (TEAOH) is used as template, and the raw materials are borax, sodium hydroxide and silica gel.

[0057] The molar ratio of feeding is:

[0058] SiO 2 / B 2 o 3 =30;TEAOH / B 2 o 3 =3.6; Al 2 o 3 / B 2 o 3 =0

[0059] Na 2 O / B 2 o 3 = 2; H 2 O / B 2 o 3 =200.

[0060] The first stage reaction conditions: 120°C, time: 20 hours

[0061] Second stage reaction conditions: 140°C, time: 40 hours

[0062] The third stage reaction condition: 180°C, time: 8 hours.

[0063] The synthesized sample is sample A of silicon-boron-oxygen crystalline material.

Embodiment 2

[0065] Tetraethylammonium hydroxide (TEAOH) is used as a template, and the raw materials are boric acid, sodium hydroxide and water glass.

[0066] The molar ratio of feeding is:

[0067] SiO 2 / B 2 o 3 =55;TEAOH / B 2 o 3 =1.8; Al 2 o 3 / B 2 o 3 =0.5

[0068] Na 2 O / B 2 o 3 =12;H 2 O / B 2 o 3 =400.

[0069] The first stage reaction conditions: 140°C, time: 30 hours

[0070] Second stage reaction conditions: 150°C, time: 48 hours

[0071]The reaction condition of the third stage: 180°C, the time: 20 hours.

[0072] The main properties of the products obtained are listed in Table 1.

[0073] A sample silicon-boron-oxygen crystalline material sample B was obtained.

[0074] Table 1 Main physicochemical properties of silicon-boron-oxygen crystalline materials

[0075] sample

Embodiment 3

[0077] The invention synthesizes the modified silicon-boron-oxygen crystal material C. Take 2000ml of A sample slurry, containing 400g of solid phase (on a dry basis), dilute the solid-liquid volume ratio to 1:10 with clean water, then add ammonium nitrate to make the concentration of ammonium nitrate in the solution 2.0M, stir, and heat up to 90 Stir at ~95°C for 2 hours at a constant temperature, then cool down to 5-60°C for filtration, and perform a second exchange of the wet filter cake under the same conditions as the first. The silicon-boron-oxygen crystalline material exchanged twice with ammonium salts is washed until the pH reaches 5-6, and then placed in a drying oven and dried at 110-120° C. for 6 hours (dry basis is 88% by weight). The dried silicon-boron-oxygen crystalline material was placed in a muffle furnace and rapidly raised to 250°C, kept at a constant temperature for 2 hours, then continued to rapidly rise to 400°C, kept at a constant temperature for 4 hou...

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Abstract

The invention discloses a hydrocracking catalyst, a preparation method and application thereof. The hydrocracking catalyst comprises 1-50 percent of modified silicon-boron-oxygen crystallization material, 1-50 percent of Y zeolite, 10-60 percent of amorphous silicon aluminum, 10-40 percent of VIB-family metal oxide and 1-10 percent of VIII-family metal oxide, wherein the mol ratio of SiO2 / B2O3 ofthe modified silicon-boron-oxygen crystallization material is 20-150, the volume of a secondary pore with pore diameter of more than 2nm is above 40 percent of the total volume, the specific surface is 500-750m<2> / g, and infrared acidity is 0.05-0.50mmol / g. The catalyst has excellent hydrocracking performance and hydrodewaxing performance, good activity and high middle-oil selectivity, is suitable for a hydrocracking process of producing jet fuel and clean diesel, and is especially suitable for producing low-condensation point diesel.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and its preparation method and application, which is characterized in that a macroporous acid carrier containing composite zeolite components is used to carry non-precious metal hydrogenation active components. The catalyst has excellent hydrocracking performance and hydrodewaxing performance, high selectivity of medium oil, prolific production of jet fuel and diesel, and is suitable for producing diesel with wide fraction and low freezing point. Background technique [0002] The hydrocracking catalyst is a dual-functional catalyst with hydrogenation performance and cracking performance. The non-precious metal hydrocracking catalyst generally uses Group VIB and Group VIII metals as the hydrogenation component, and the acidic component can choose crystalline zeolites and / or non-precious metals. Shaped silica-alumina. Simple use of amorphous silicon-alumina, although the selectivity is high, but the acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/86B01J35/10C10G47/20C10G73/02
Inventor 谷明镝
Owner CHINA PETROLEUM & CHEM CORP
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