Porous material and preparation method thereof

A porous material and microporous technology, applied in the field of porous materials, can solve the problems of affecting the cracking reaction of macromolecules, small pores, etc., to achieve the effect of improving the benefit space, small particle size, and reducing production costs

Active Publication Date: 2017-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although microporous molecular sieves have high cracking activity, their pores are small, which can significantly restrict the di

Method used

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  • Porous material and preparation method thereof

Examples

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Example Embodiment

[0032] Example 1

[0033] This example illustrates the preparation of the porous material provided by the present invention.

[0034] Take Al 2 (SO 4 ) 3 Solution (concentration 50gAl 2 O 3 / L) and ammonia (25% by mass) are the raw materials for the reaction, and the Al 2 (SO 4 ) 3 The solution and ammonia water were added at the same time and flowed into a gel. The temperature of the gel slurry was controlled to 50℃, and the pH value of the gel slurry was 9.0. During the gel forming process, the NaY mother liquor (concentration 50gSiO 2 / L, the suspended solids concentration 100mg / L) is added in parallel in proportion to achieve online addition. A certain amount of mixed slurry is collected and then heated to 60°C for aging for 2 hours; after filtration, the solid precipitate obtained is dried on a precipitate basis : Ammonium salt: H 2 The weight ratio of O=1:0.8:12 was exchanged at 55°C for 1 hour, and the porous material provided by the present invention was obtained after filte...

Example Embodiment

[0036] Example 2

[0037] This example illustrates the preparation of the porous material provided by the present invention.

[0038] Take Al 2 (SO 4 ) 3 The solution and ammonia are the raw materials for the reaction, and the Al 2 (SO 4 ) 3 The solution and ammonia water are added at the same time and flow into a gel at the same time. The gel forming temperature is controlled to 35℃, the pH value of the gel forming system is 8.5, and the NaY water is washed in the filtrate (concentration 40gSiO 2 / L, the concentration of suspended solids is 5400mg / L) is added in parallel in proportion to achieve online addition. After collecting a certain amount of mixed slurry, it is heated to 50°C for aging for 2 hours; after filtration, the solid precipitate is obtained on a dry basis. : Ammonium salt: H 2 The weight ratio of O=1:0.4:10 was exchanged at 50°C for 0.5 hours, filtered and washed with water, and ammonium exchange was repeated once. After filtering, the porous material provided by th...

Example Embodiment

[0044] Example 3

[0045] This example illustrates the preparation of the porous material provided by the present invention.

[0046] Take Al 2 (SO 4 ) 3 Solution and NaAlO 2 Solution (concentration 102gAl 2 O 3 / L) is the raw material for the reaction, NaAlO 2 Solution and Al 2 (SO 4 ) 3 The solution flows into a gel in parallel, and the gel pH value is controlled at 10.5. During the gel forming process, a mixture of NaY crystallized mother liquor and water washing filtrate (concentration 34gSiO 2 / L, the concentration of suspended solids is 2100mg / L) in proportion to add in parallel to achieve online addition. Collect a certain amount of mixed slurry and then heat it up to 70°C for aging for 1 hour; after filtering, the resulting solid precipitate is dried on a precipitate basis : Ammonium salt: H 2 The weight ratio of O=1:0.5:10 was exchanged at 60°C for 0.5 hours, filtered and washed with water, and ammonium exchange was repeated once. After filtering, the porous material provid...

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Abstract

The invention relates to a porous material, which is characterized in that it has a pseudoboehmite crystal phase structure and a FAU crystal phase structure, the ratio of the micropore specific surface area to the total specific surface area is ≯8%, and the average pore diameter is 8-15 nm. The particle size distribution is D(V,0.5)≤4μm, D(V,0.9)≤12μm. The material has a small particle size and excellent cracking properties.

Description

technical field [0001] The invention relates to a porous material and a preparation method thereof, in particular to a porous material doped with a small amount of Y-type molecular sieve, with obvious mesopore characteristics, strong cracking ability and smaller particle size. Background technique [0002] Catalytic cracking is a very important process in the petroleum refining process and is widely used in the petroleum processing industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components undergo cracking reactions in the presence of catalysts to produce liquefied gas, gasoline, diesel and other products to meet market demand. Catalytic materials with certain acidity and higher cracking activity are used. Microporous molecular sieve materials have the characteristics of uniform pore size distribution, large specific surface area, strong acidity and high cracking reactivity, and are widely used in petroleum r...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 郑金玉王成强罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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