High-activity amorphous silica-alumina, hydrocracking catalyst supported by amorphous silica-alumina, and preparation methods thereof

An amorphous silica-alumina, hydrocracking technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst carriers, etc. The product cannot meet the content standard, the catalyst is excessively cracked and other problems, to achieve the effect of improving reaction efficiency, moderate acidity and improving selectivity

Active Publication Date: 2017-05-31
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent application (CN1597093A) discloses an amorphous silicon-alumina prepared by carbonization, containing 8wt%-50wt% of silicon oxide, and a specific surface of 300-550m 2 /g, the pore volume is 0.7-1.5ml/g, and the infrared acidity is 0.32-0.50mmol/g. The disadvantage is that there are more strong acids and relatively less L acids, whic

Method used

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  • High-activity amorphous silica-alumina, hydrocracking catalyst supported by amorphous silica-alumina, and preparation methods thereof
  • High-activity amorphous silica-alumina, hydrocracking catalyst supported by amorphous silica-alumina, and preparation methods thereof

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Embodiment 1

[0050] Make aluminum nitrate into a 2mol / L solution, and then add a solution with a specific surface area of ​​260m 2 / g of white carbon black is stirred evenly, and the mass ratio of silicon oxide to aluminum oxide is 15:85. Sodium carbonate is made into a 2mol / L solution, and the two solutions are co-currently precipitated at 55°C. The precipitation rate is 20mL / min, and the precipitation pH value is 8.5. After the precipitation, continue to stir for 20 minutes, and transfer the mixed material to Crystallization (constant temperature aging) at 95°C for 48 hours in a closed reactor. The crystallized material is cooled, then filtered, washed, moderately dried and extruded. The formed carrier was calcined at 550° C. for 6 hours to obtain an amorphous silica-alumina carrier.

[0051] The weight percent composition of silicon oxide and aluminum oxide in the carrier is: SiO 2 :Al 2 o 3 =15.0:85.

Embodiment 2

[0053] Prepare catalyst by the step of embodiment 1, change silicon source white carbon black into water glass, precipitant is the sodium hydroxide solution of 2mol / L, change the proportioning of silicon oxide and aluminum oxide in aluminum nitrate and sodium silicate solution simultaneously , the rest of the operating conditions remain unchanged to prepare the carrier, and the weight percentage of each component of the carrier is composed of: SiO 2 :Al 2 o 3 =20.5:79.5.

Embodiment 3

[0055] Prepare catalyst by the step of embodiment 1, change silicon source white carbon black into silica sol, aluminum source is aluminum sulfate, precipitating agent is the sodium hydroxide solution of 2mol / L, precipitation temperature is 80 ℃, and precipitation pH value is 10.0, After precipitation, move the slurry into the reaction kettle for crystallization at 180°C for 24 hours, then filter, wash, and dry to form an amorphous silica-alumina carrier. The mass ratio of each component of the obtained carrier is: SiO 2 :Al 2 o 3 =27.8:72.2.

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Abstract

The invention discloses a high-activity amorphous silica-alumina, a hydrocracking catalyst supported by amorphous silica-alumina, and preparation methods thereof. The preparation method of the amorphous silica-alumina supporter comprises the following steps: preparing a silicon source-aluminum source mixed water solution, mixing the mixed water solution with a precipitant solution, carrying out cocurrent flow coprecipitation to obtain a precipitated slurry, transferring the slurry into a closed vessel, aging, molding, and roasting. The invention also provides a preparation method of a hydrocracking catalyst by using the amorphous silica-alumina as the supporter. The preparation method of the hydrocracking catalyst is as follows: in the preparation method of the amorphous silica-alumina supporter, a nickel salt or nickel salt and metal aid M salt is/are added into the silicon source-aluminum source mixed water solution in the step (1), and the rest steps are the same as those in the preparation method of the amorphous silica-alumina supporter. The coprecipitation process is adopted in the preparation process, and the silicon source and aluminum source finally exist in the catalyst in the form of the amorphous silica-alumina, but the catalyst has much higher activity than the common amorphous silica-alumina catalyst.

Description

technical field [0001] The invention relates to a high-activity amorphous silicon-aluminum catalyst, a hydrocracking catalyst using it as a carrier and a preparation method thereof, belonging to the field of oil product processing. Background technique [0002] FT synthetic oil is sulfur-free, nitrogen-free, and aromatic-free. It is mainly composed of paraffins and olefins with different carbon numbers, and most of the olefins are alpha olefins. The carbon number distribution of FT products is relatively wide, and the highest can exceed one hundred. FT synthetic intermediate products are suitable for processing and producing high-quality diesel oil, aviation kerosene, naphtha, etc. Converting FT heavy hydrocarbons into diesel and aviation kerosene through hydrocracking process is one of the more important technologies in FT product processing technology, and the performance of hydrocracking catalyst directly affects the yield and quality of target products. [0003] The hy...

Claims

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Application Information

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IPC IPC(8): B01J21/12B01J23/755B01J23/80B01J23/86B01J23/883B01J23/888B01J32/00C10G11/04
CPCB01J21/12B01J23/755B01J23/80B01J23/866B01J23/883B01J23/888C10G11/04C10G2300/1022C10G2300/70
Inventor 樊莲莲陶智超杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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