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Phosphorus-containing high-silicon molecular sieve as well as preparation method and application thereof

A molecular sieve and high-silicon technology, applied in molecular sieve catalysts, chemical instruments and methods, hydrocarbon oil cracking, etc., can solve the problems of short-range ordering of materials and difficulty in long-range ordering

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although these methods can produce a certain amount of acidity, in order to maintain the stability of the matrix structure during the synthesis process, there are a large amount of non-skeleton hexacoordinate aluminum in the obtained sample, which makes the material short-range order, and it is difficult to achieve long-range order.

Method used

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  • Phosphorus-containing high-silicon molecular sieve as well as preparation method and application thereof
  • Phosphorus-containing high-silicon molecular sieve as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0060] Get RY molecular sieve (produced by Sinopec Catalyst Changling Branch Company, unit cell constant is 2.456nm, specific surface area is 672m 2 / g, the pore volume is 0.357mL / g, Na 2 O content is 1.44 wt%, P 2 o 5 The content is 1.37% by weight) 500g was put into a hydrothermal kettle, 100% steam was passed through, and the hydrothermal treatment was carried out at 560°C and 0.8MPa for 3 hours, and then the hydrothermally treated molecular sieve material was taken out.

[0061] Take 50 g (dry basis) of the molecular sieve material after hydrothermal treatment obtained above, add 500 mL of deionized water, stir and beat to obtain the first slurry, heat it up to 80 ° C, add 2.0 mol / L sulfuric acid solution, and detect the When the pH value of the first slurry was 2.8, the addition of acid was stopped, then the reaction was carried out at constant temperature for 4 hours, and filtered to obtain 40 g of the first solid product.

[0062] Add the first solid product above to...

preparation Embodiment 2

[0064] The molecular sieve with high silicon content was prepared according to the method of Preparation Example 1, with the difference that when adding the second acid solution, it was added at a rate of 15 mol / h. Molecular sieve Y-2 was prepared, and its XRD spectrum is shown in Figure 1. It can be seen that the diffraction angle position of the first strong peak is 6.1-6.8°, the diffraction angle position of the second strong peak is 10.2-10.7°, and the third strong peak The diffraction angle position of the peak is 15.8-16.5°, the diffraction angle position of the fourth strongest peak is 20.8-21.4°, and the diffraction angle position of the fifth strongest peak is 12.1-12.6°. Other properties are shown in Table 1.

Embodiment 1

[0079] 80g Y-1 dry basis molecular sieve is mixed with 20g pseudoboehmite (produced by Sinopec Catalyst Changling Branch Company, trade name PB90, dry basis 70% by weight) and extruded into a trefoil strip with a circumscribed circle diameter of 1.6 mm , dried at 120°C for 3h, and calcined at 600°C for 3h to obtain carrier CS-1. After being cooled to room temperature, get 100g CS-1 carrier with ammonium metatungstate (Sichuan Zigong Cemented Carbide Factory, tungsten oxide content is 82% by weight) 34.65g, nickel nitrate (product of Beijing Xinguang Chemical Reagent Factory, nickel oxide content is 27.85% by weight) 24.37g was impregnated in 70mL aqueous solution, dried at 120°C for 3h, and calcined at 480°C for 4h to obtain the catalyst prepared in this example.

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Abstract

The invention relates to a phosphorus-containing high-silicon molecular sieve as well as a preparation method and application thereof. The pore volume of the molecular sieve is 0.20-0.50 mL / g; the specific surface area of the molecular sieve is 260-600m < 2 > / g, and the molecular sieve contains 90-99.8 wt% of silicon, 0.1-9.0 wt% of aluminum and 0.01-2.5 wt% of phosphorus based on the dry basis weight of the molecular sieve in terms of oxide; in an XRD spectrogram of the molecular sieve, the diffraction angle position of a first strong peak is at 5.9-6.9 degrees, the diffraction angle positionof a second strong peak is at 10.0-11.0 degrees, and the diffraction angle position of a third strong peak is at 15.6-16.7 degrees. Compared with a conventional amorphous silica-alumina material, thephosphorus-containing high-silicon molecular sieve disclosed by the invention has better anti-nitrogen stability, and shows higher hydrocracking activity when being used for preparing a hydrocrackingcatalyst.

Description

technical field [0001] The disclosure relates to a phosphorus-containing high-silicon molecular sieve and its preparation method and application. Background technique [0002] Industrial hydrocracking feeds include heavy and inferior fractions such as VGO, which contain a large amount of polycyclic aromatic hydrocarbons and naphthenes, as well as a large amount of nitrogen-containing compounds. The mass percentage of nitrogen in feedstock for conventional hydrocracking is generally between 0.1 and 0.2. However, secondary refining processes such as coking, solvent deasphalting, etc. often generate a large amount of nitrogen-containing compounds, and the nitrogen content often exceeds 0.3%, and some even reach 0.6%, which makes it difficult to remove the nitrogen content to a minimum after using conventional refining catalysts. The 10-100 ppm level that conventional molecular sieve type hydrocracking catalysts can tolerate. Generally, weakly acidic amorphous silica-alumina o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G47/16
CPCB01J29/084C10G47/16C10G2300/10C10G2300/1037C10G2300/107C10G2300/1074C10G2300/1077
Inventor 毛以朝龙湘云张润强赵阳赵广乐
Owner CHINA PETROLEUM & CHEM CORP
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