A kind of porous catalytic material and preparation method thereof

A catalytic material and microporous technology, applied in the field of multi-structured porous catalytic material and its preparation, can solve the problems of improving, increasing the cost of filtrate and waste residue treatment, and high cost of recycling, so as to reduce production cost, reduce preparation cost, and promote The effect of precracking

Active Publication Date: 2021-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in the existing technology, the silicon content in the crystallization mother liquor of NaY molecular sieve and the washing filtrate is very different, especially in the washing filtrate, the silicon content will gradually decrease with the increase of the number of washing stages. At the same time, a certain proportion of molecular sieve microcrystals may be formed during the crystallization process of NaY molecular sieves. These microcrystals have a small particle size and can easily penetrate the filter device and enter the filtrate. In the process, the concentration of suspended solids in the washing filtrate will increase. In order to avoid the formation of miscellaneous crystals caused by the re-entry of molecular sieve microcrystals into the synthesis system during the recycling process, the filtrate usually needs to be settled and slag-cut, which greatly increases the amount of filtrate and waste residue. processing fee

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  • A kind of porous catalytic material and preparation method thereof
  • A kind of porous catalytic material and preparation method thereof
  • A kind of porous catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example illustrates the catalytic material of the present invention and its preparation process.

[0036] First add a small amount of deionized water in the container, and under room temperature and vigorous stirring, the NaY molecular sieve crystallization mother liquor (concentration 55gSiO 2 / L, suspended matter concentration 39mg / L) and sodium metaaluminate solution (186gAl 2 o 3 / L, caustic ratio 2.45) is simultaneously added into the container in a co-current manner to form a gel continuously, and the pH value is controlled to be 13.7; then the metered AlCl is added 3 Solution (concentration 60gAl 2 o 3 / L) and adjust the pH value of the slurry to 9.7, heat up to 55°C and treat at a constant temperature for 2 hours; filter the resulting solid precipitate according to the dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:0.6:10 was exchanged at 55° C. for 0.5 hour, repeated exchange once, filtered and washed with water to obtain the ...

Embodiment 2

[0045] This example illustrates the catalytic material of the present invention and its preparation process.

[0046] First, a small amount of deionized water was added to the container and the temperature was raised to 40°C, and the NaY molecular sieve crystallization filtrate (concentration 20gSiO 2 / L, suspended matter concentration 98mg / L) and sodium metaaluminate solution (159gAl 2 o 3 / L, caustic ratio 1.65) is simultaneously added into the container in a co-current manner to form a gel continuously, and the pH value is controlled to be 13.5; then added metered Al 2 (SO 4 ) 3 Solution (concentration 90gAl 2 o 3 / L) and adjust the pH value of the slurry to 10.1, heat up to 80°C and treat at a constant temperature for 4 hours; filter the resulting solid precipitate according to the dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:0.7:10 was exchanged at 60° C. for 0.5 hour, repeated exchange once, filtered and washed with water to obtain the c...

Embodiment 3

[0051] This example illustrates the catalytic material of the present invention and its preparation process.

[0052] First, a small amount of deionized water was added to the container and the temperature was raised to 50°C, and the NaY molecular sieve crystallization filtrate (concentration 41gSiO 2 / L, suspended matter concentration 2112mg / L) and sodium metaaluminate solution (102gAl 2 o 3 / L, caustic ratio 2.55) is simultaneously added into the container in a co-current manner to form a gel continuously, and the pH value is controlled to be 13.4; then added metered Al(NO 3 ) 3 Solution (concentration 60gAl 2 o 3 / L) and adjust the pH value of the slurry to 9.0, continue to treat at a constant temperature at 50°C for 8 hours; filter the resulting solid precipitate according to the dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:1:12 was exchanged at 70° C. for 1 hour, filtered and washed with water to obtain the catalytic material provided by t...

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Abstract

A kind of porous catalytic material, it is characterized in that, the XRD spectrogram of this catalytic material is 25 °~27 ° of 2θ angles to appear a diffuse diffraction peak, there is FAU crystal phase structure simultaneously, its chemical composition contains , 50-80% silicon and 20-50% aluminum, total specific surface area≯250m 2 / g, the ratio of the micropore specific surface area to the total specific surface area≯28%, the ratio of the number of B acid sites to the number of L acid sites measured by pyridine infrared at 200°C is ≥0.30; when the surface Al / Si measured by XPS method When the atomic ratio is a, and the bulk Al / Si atomic ratio measured by the XRF method is b, a / b=1.1˜1.6.

Description

technical field [0001] The invention relates to a porous catalytic material and a preparation method thereof, and further to a multi-structure porous catalytic material and a preparation method thereof. Background technique [0002] As an important reaction process in petroleum refining and processing, fluid catalytic cracking has been widely used in petroleum processing industry and plays a pivotal role in refineries. In the process of catalytic cracking reaction, heavy distillate such as vacuum distillate oil or residue oil of heavier components undergoes cracking reaction in the presence of catalyst, and is converted into liquid cracking products such as gasoline and diesel oil and lighter gaseous cracking products. Catalytic cracking reaction Generally follow the carbocation reaction mechanism, so it is usually necessary to use catalytic materials with higher acidity, especially Bronsted acid centers, in the reaction process. [0003] Zeolite molecular sieve is a kind o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/10C10G11/05C10G45/12C10G47/16C10G49/08
CPCB01J21/06B01J35/1019B01J35/1061C10G11/05C10G45/12C10G47/16C10G49/08C10G2300/1044
Inventor 郑金玉王成强罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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