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Hydroprocessing catalyst and its prepn process

A technology of hydroprocessing and catalyst, which is applied in the fields of refined hydrocarbon oil and petroleum industry, etc. It can solve the problems such as small number of small and medium pores, unsuitable for hydrodemercaptan reaction of low molecular weight distillate oil, etc., and achieve the effect of improving the reaction activity

Active Publication Date: 2005-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above three patents mentions the pore size distribution of the catalyst. Those of ordinary skill in the art believe that it should be the pore size distribution of ordinary refined catalysts, and the pore size distribution of ordinary refined catalysts is mostly dispersed in the range of 4 to 10 nm. The number of small and medium pores Less, not suitable for hydrodemercaptanization of low molecular weight distillates

Method used

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Examples

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preparation example Construction

[0029] According to the preparation method of catalyst provided by the invention, its concrete steps are respectively as follows:

[0030] (1) Preparation of catalyst carrier

[0031] a. Mix macroporous alumina and small pore alumina as raw materials.

[0032] b. Add a binder (preferably alumina, based on the weight of the carrier after roasting, the solid content of alumina is 5% to 30%, and the molar ratio of peptizer to alumina is 0.10 to 0.35) into the mixed raw materials , and adding an extrusion aid (preferably citric acid, safflower powder, based on the weight of the carrier after roasting, the content of the extrusion aid is 0.5% to 10%), kneading, rolling, and extruding.

[0033] c. Air-dry the extruded strip at room temperature, dry at 100-150° C. for 1-24 hours, and then crush to obtain a dried strip with a length of 3-8 mm.

[0034] d. Calcining the above dried strips in a muffle furnace at 450-700° C. for 0.5-24 hours to obtain a catalyst carrier.

[0035] (2) ...

Embodiment 1

[0058] Example 1 is the preparation of the carrier provided by the present invention.

[0059] Take 128.5g of industrial macroporous alumina, 150g of industrial microporous alumina, PURALSB-Al produced in Germany 2 o 3 41.7g, 5g of citric acid, and 8g of industrial scallop powder were mixed for 45 minutes, and 240g of binder (PURAL SB-Al produced in Germany) were added. 2 o 3 Prepared by beating with nitric acid with a volume concentration of 65%, the solid content of the binder is 25wt%, nitric acid / SB-Al 2 o 3 The molar ratio is 0.25) and kneaded for 30 minutes, then rolled for 5 minutes, extruded to obtain clover strips with a diameter of 1.5mm, dried at 110°C for 2 hours, and calcined at 550°C for 24 hours. Vector Z-A was obtained.

Embodiment 2

[0062] Take 0.8g barium nitrate Ba(NO 3 ) 2 Add distilled water to dissolve, dilute to 250ml with a volumetric flask, and make a barium-containing aqueous solution. Take 100g of the carrier Z-A obtained by the above preparation method, and use 70ml of the barium-containing aqueous solution prepared by the above method to saturate and impregnate for 6 hours, dry overnight after impregnation, and dry at 110°C for 24 hours, then roast at 550°C 3 hours. The carrier Z-B containing alkali metal barium was obtained.

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Abstract

The present invention is one kind of hydroprocessing catalyst and its preparation process. The catalyst contains alkali assistant and active components including Ni and Mo and / or W, with the atom number of Ni accounting for 0.3-0.9 of the total atom number of Ni and Mo and / or W; and the pore volume of 2-6 nm pores accounts for 70-90 % of total pore volume. The catalyst is prepared through mixing different pore structures of alumina to form carrier, soaking the alumina carrier first with alkali assistant aqua and then Mo and / or W compounds aqua and Ni compound aqua. Compared with available technology, the catalyst of the present invention has high Ni content in active components, more middle and small sized holes, high hydrogenation mercaptol-eliminating and olefin-saturating activity, and is especially suitable for mercaptol-eliminating process after hydrogenation.

Description

technical field [0001] The invention relates to a hydroprocessing catalyst and a preparation method thereof, in particular to a hydrocracking post-treatment catalyst and a preparation method thereof. Background technique [0002] Hydrocracking is a petroleum refining process that breaks high-boiling hydrocarbons through C-C bonds to form small molecules and low-boiling target products. Since heavy oil and other hydrocracking raw materials usually contain impurities such as sulfur, oxygen, and nitrogen, the raw materials usually need to undergo hydrocracking pre-refining process (HDS, HDN, HDO) to remove impurities before hydrocracking. In the process of hydrocracking reaction, high-boiling hydrocarbons can form small molecular hydrocarbons through the breakage of C-C bonds, and the target products with higher H / C ratio can be obtained through hydrogenation. The organic sulfides in the raw materials are hydrogenated and refined to generate H 2 S enters the gas phase and rea...

Claims

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Application Information

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IPC IPC(8): C10G45/00
Inventor 姚颂东温德荣梁相程刘雪玲喻正南王继锋
Owner CHINA PETROLEUM & CHEM CORP
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