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Catalyst for hydrogenation treatment of diesel oil and its preparation method

A hydrogenation treatment and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor saturation capacity and unsuitability of aromatic hydrocarbons, and achieve Effects of high dearomatization activity, increased diesel density reduction, and good catalytic performance

Inactive Publication Date: 2003-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has high desulfurization and nitrogen activity, but it is not suitable as a diesel hydrotreating catalyst due to its poor saturation ability of aromatics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] According to the preparation method of catalyst provided by the invention, its concrete steps are as follows:

[0017] 1. Preparation of the support: the precursor of small-pore alumina whose pore volume is less than 80 angstroms accounts for more than 95% of the total pore volume; The precursor of macroporous alumina and zeolite are mixed evenly, shaped according to the conventional hydrogenation catalyst shaping method, then dried and calcined.

[0018] Wherein, the ratio of the small-pore alumina precursor to the macroporous alumina precursor makes the weight ratio of the small-pore alumina to the macroporous alumina in the obtained catalyst support 75:25-50:50, and the small-pore alumina precursor . The amount of macroporous alumina precursor and zeolite is such that the weight ratio of alumina to zeolite in the catalyst carrier is 90:10-50:50, preferably 90:10-60:40.

[0019] The precursor of the small-pore alumina refers to one or more of the various hydrated alu...

example 1-6

[0029] The preparation of the catalyst provided by the invention.

[0030] 1. Preparation of Catalyst Support

[0031] Take the precursor of pinhole alumina (the first hydrated alumina, product name is dry pseudo-boehmite, produced by Shandong Aluminum Plant, wherein the content of gibbsite is 80% by weight, and the content of gibbsite is 5%. % by weight, the specific surface and pore distribution of the microporous alumina (A) formed after 550 ° C roasting for 4 hours are listed in Table 1.), the precursor of macroporous alumina (the second kind of hydrated alumina, product name Changling dry rubber powder, Changling Oil Refinery Catalyst Factory produces, gibbsite content 68 weight %, gibbsite content 5 weight %, the ratio of the macroporous alumina (B) that forms after 550 ℃ roasting 4 hours Surface and pore distribution are listed in Table 1) and Y-type zeolite (Changling Oil Refinery Catalyst Factory produces, unit cell constant is 24.55 nanometers, and the total acid co...

example 7-12

[0053] The following examples illustrate the performance of the catalysts provided by this invention.

[0054] With a density of 0.8963 g / cm 3 , the sulfur content is 4900ppm, the nitrogen content is that the catalytic cracking diesel oil of 707ppm is raw material, evaluates the catalyst C provided by the invention on the small-scale fixed-bed device 1 -C 6 Catalytic performance, the catalyst loading is 10 ml, the reaction conditions are reaction temperature 360 ​​° C, hydrogen partial pressure 3.2 MPa, liquid hourly space velocity 2.0 hours -1 , The volume ratio of hydrogen to oil is 350. The change of cetane number is characterized by the decrease of diesel density, and the results are listed in Table 5.

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Abstract

The present invention relates to a catalyst for hydrotreating diesel oil, it contains one carrier and molybdenum and / or tungsten and nickiel and / or cobalt loaded on said carrier. The described carrier is composed of alumina and zeolite, and the weight ratio of the alumina and zeolite is 90:10-50:50, and the described alumina is formed from microporous alumina anjd macroporous alumina according tothe weight ratio of 75:25-50:50, in which the micrporous alumina is the alumina whose proe volume whose diameter is less than 80 angstrom pore is above 95% of total pore volume, and the macroporous alumia is the alumina whose pore volume whose diameter is 60-600 angstrom pore is above 70% of total pore volume.

Description

technical field [0001] The present invention relates to a hydrogenation treatment catalyst and its preparation method, more specifically to a diesel oil hydrogenation treatment catalyst containing molybdenum and / or tungsten and nickel and / or cobalt and its preparation method. Background technique [0002] In recent years, the market demand for diesel oil has increased year by year, and the production of diesel oil has become a direction of the catalytic cracking process. The characteristics of catalytic cracking diesel oil are high content of sulfur, nitrogen and aromatics. Therefore, its cetane number is low and storage stability is poor. There are many toxic gases emitted during combustion, which is not suitable for environmental protection requirements. Hydrotreating diesel oil can remove sulfur and nitrogen and reduce the content of aromatics. Therefore, hydrotreating is an effective method to improve the properties of diesel oil, and its key te...

Claims

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Application Information

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IPC IPC(8): B01JB01J23/28B01J23/63B01J23/75B01J23/755C10G45/08
Inventor 应亦兵刘学芬赵新强聂红胡志海蒋东红
Owner CHINA PETROLEUM & CHEM CORP
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