Process for preparing hydrotreating catalyst

A hydrotreating and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of reducing the utilization rate of active metals, increasing processing costs, excessive hydrogen consumption, etc. The effect of good regeneration performance, increased surface area, and rich pore structure

Active Publication Date: 2020-03-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the good hydrogenation performance of the catalyst W-Ni-Mo active metal combination will make some easy desulfurization and denitrogenation reactions to be realized through the hydrogenation path, resulting in excessive hydrogen consumption and increased processing costs.
In addition, the co-precipitation of W-Mo-Ni and Al will cause some active metals to form aluminates with strong effects on Al, which is not easy to reductive vulcanization, and reduces the utilization rate of active metals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The preparation method of the hydrotreating catalyst provided by the invention specifically comprises:

[0038] (1) Preparation of Al oxide precursor slurry A

[0039] The present invention preferably adopts the neutralization precipitation method, that is, the pseudo-boehmite slurry is obtained by neutralizing and precipitating aluminum salt solution and ammonia water in parallel, wherein the gelling temperature is 65°C-85°C, and the gelling pH value 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 additive Si can be introduced into the aluminum salt solution according to the needs of the catalyst, and the silicon source can be one or more of water glass, silica sol, etc.

[0040] (2) Preparation of oxide precursor slurry B of Mo and Co

[0041] Cobalt salt is prepared into acidic solution B1, molybdenum salt i...

Embodiment 1

[0052] (1) Preparation of Al oxide precursor slurry A

[0053] Add 600mL of clean water and 120g of aluminum nitrate into a container, stir to dissolve it, and dropwise add 2 100mL of 40g / L dilute water glass solution to obtain a salt solution containing Al and Si; prepare 2000mL of 20wt% ammonia solution in a container; , put the salt solution containing Al and Si and 20wt% ammonia solution into the reaction tank to form a gel, control the reaction temperature at about 75°C, the pH of the slurry at 8.5±0.2, and the reaction time at about 60min to obtain the oxide of Al Precursor slurry A;

[0054] (2) Preparation of oxide precursor slurry B of Mo and Co

[0055] Add 500mL of clean water, 10g of ammonium paramolybdate, 1.2g of ammonium bicarbonate into a container, heat to 75°C, stir to dissolve; add 600mL of clean water, 11g of cobalt nitrate into a gelling tank, stir to dissolve , add 170mL of the oxide precursor slurry of Al prepared in step (1), stir evenly, raise the t...

Embodiment 2

[0063]The preparation method of catalyst B of the present invention is the same as that of Example 1, except that in step (2) when preparing the oxide precursor slurry B of Mo and Co, 7.6 g of ammonium paramolybdate and 1.1 g of ammonium bicarbonate are added to the alkaline solution B2. g, 2.5g ammonium dihydrogen phosphate, add 8.4g cobalt nitrate to the acidic solution B1; step (3) when preparing the oxide precursor slurry C of Mo and Ni, add 14.3g nickel nitrate to the acidic solution C1, 13.0 g of ammonium paramolybdate and 1.8 g of ammonium bicarbonate were added to the acidic solution C2; when step (4) was used to prepare the oxide precursor slurry D of Ni, 43.9 g of nickel nitrate was added to the acidic solution D1, and the others were the same as in Example 1 to obtain Catalyst B of the present invention.

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Abstract

The invention discloses a hydrotreating catalyst preparation method, which comprises: preparing an Al oxide precursor slurry A; preparing the oxide precursor slurry B of Mo and Co; preparing the oxideprecursor slurry C of Mo and Ni; preparing a Ni oxide precursor slurry D; and mixing the slurry A, the slurry B, the slurry C and the slurry D, aging, filtering, drying, molding, washing, drying, androasting to obtain the hydrotreating catalyst. According to the present invention, the hydrotreating catalyst has the greatly-increased hydrodenitrogenation activity and the greatly-increased hydrodesulfurization activity, and is suitable for the pretreatment of hydrocracking raw materials and catalytic cracking raw materials, the hydrotreating of distillate oil, and other processes.

Description

technical field [0001] The invention relates to a preparation method of a hydrotreating catalyst, in particular to a preparation method of a hydrocracking pretreatment catalyst. Background technique [0002] The rapid development of the world economy has led to a large amount of fuel consumption in industry and logistics and transportation, which has accelerated the trend of crude oil becoming heavy and inferior. It is expected that the processing of heavy and low-quality raw materials will be long-term in the future. Heavy and low-quality raw materials have high dry point, high carbon residue content, and also contain a large amount of nitrogen-containing compounds, polycyclic aromatic hydrocarbons and heavy metals, which can accelerate catalyst poisoning and coking, and shorten the service life of the catalyst. [0003] Nitrogen-containing compounds, especially basic nitrogen compounds, have strong adsorption on the acidic center of the cracking catalyst. If they are not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19
CPCB01J27/19B01J35/1019B01J35/1038
Inventor 冯小萍刘东香徐学军王海涛
Owner CHINA PETROLEUM & CHEM CORP
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