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A kind of preparation method of hydrocracking catalyst

A hydrocracking and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems that affect the performance of the catalyst and the coordination effect cannot be fully exerted

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active metals in the above methods are all introduced by one-step co-precipitation method, which will make the coordination between the active metals and the active metal and the support unable to be fully exerted, thus affecting the performance of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the hydrocracking catalyst provided by the invention specifically comprises:

[0032] (1) Preparation of oxide precursor slurry A of Si and Al;

[0033] The present invention preferably adopts the neutralization precipitation method, promptly carries out neutralization precipitation with the solution of aluminum salt and ammoniacal liquor parallel flow, and wherein silicon source is added in the reaction system when the solution of aluminum salt and ammoniacal liquor are added and / or after, can be mixed with reaction material Add to the reaction system after mixing, or add to the reaction system separately to obtain Si and Al oxide precursor slurry A, wherein the gelling temperature is 65°C-85°C, and the gelling pH is 8-10. The aluminum salt can be one or more of aluminum chloride, aluminum nitrate, aluminum sulfate and the like. The concentration of ammonia water can be any feasible ratio, preferably 15wt%-25wt%. The aluminum salt is one or ...

Embodiment 1

[0048] (1) Preparation of oxide precursor slurry A of Si and Al

[0049] Add 800mL of clean water and 86.5g of aluminum nitrate to a container, stir to dissolve it, and add SiO 2 Mix 100mL of 130g / L dilute water glass solution evenly to obtain a salt solution containing Si and Al; prepare 2000mL of 20wt% ammonia solution in a container; Under stirring, add Si and Al salt solution and 20wt% ammonia solution into the reaction tank in parallel to form a gel, control the reaction temperature at about 75°C, the pH of the slurry at 8.0±0.2, and the reaction time at about 60 minutes to obtain Si and Al The oxide precursor slurry A;

[0050] (2) Preparation of the oxide precursor slurry B of W and Ni

[0051] Add 600mL of clean water and 14.4g of sodium tungstate to a container, stir to dissolve, and obtain alkaline solution B2; add 500mL of clean water and 9g of nickel nitrate to a gelling tank, stir to dissolve, and obtain acidic solution B1 , add 170mL of the oxide precursor slu...

Embodiment 2

[0062] Catalyst B preparation method of the present invention is the same as embodiment 1, and difference is that in step (1), Si, Al salt solution adds 80g aluminum nitrate, contains SiO 2 100mL of 130g / L dilute water glass solution; add 19.1g sodium tungstate to alkaline solution B2 in step (2), add 21g nickel nitrate to acidic solution B1; add 7.8g paramolybdic acid to alkaline solution C2 in step (3) Ammonium, add 17.9g nickel nitrate in acidic solution C1; Others are the same as Example 1, obtain catalyst B of the present invention.

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Abstract

The invention discloses a preparation method of a hydrocracking catalyst. The preparation method of the catalyst comprises the following steps: preparing oxide precursor slurry A of Si and Al; preparing oxide precursor slurry B of W and Ni; preparing oxide precursor slurry C of Mo and Ni; mixing the slurry A, the slurry B and the slurry C and aging the mixed slurry; adding a molecular sieve material, filtering, drying, molding, washing, drying and roasting, so as to obtain the hydrocracking catalyst. According to the preparation method, the cooperation between hydrogenated active metals and between the active metals and carriers can be improved, and the ability of the hydrocracking catalyst of transforming nitrogen-containing compounds and polycyclic aromatic hydrocarbon is improved, so that the overall performance of the catalyst is improved.

Description

technical field [0001] The invention relates to a preparation method of a hydrocracking catalyst. Background technique [0002] In recent years, the over-exploitation of crude oil has further expanded the trend of crude oil becoming heavier and inferior. At the same time, more and more attention has been paid to the harm of pollutants emitted by fuel combustion to the environment on which human beings depend, and stricter environmental protection regulations have also been introduced. As a result, refineries are faced with many arduous tasks such as increased difficulty in raw material processing and product quality upgrades. [0003] Hydrocracking can convert heavy oil into high-quality fuel oil, and its products can be sold directly without refining. Therefore, hydrocracking technology has become one of the best processing methods for processing inferior and heavy raw materials to produce high-quality fuel oil. . [0004] Hydrocracking’s requirements for raw materials c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076B01J29/16B01J37/03C10G47/20
CPCB01J29/076B01J29/166B01J37/035C10G47/20C10G2300/70
Inventor 刘东香王海涛徐学军冯小萍
Owner CHINA PETROLEUM & CHEM CORP