Carrier material containing molecular sieve and amorphous silica-alumina and preparation method thereof

A technology of amorphous silica-alumina and carrier materials, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, catalyst carriers, etc., can solve the problems of blocking molecular sieve channels, blocking channels, reducing molecular sieve pore volume and specific surface area, etc., so as to avoid secondary Cracking, improving performance, reducing the effect of excessive cracking

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that part of the amorphous silicon-alumina is easy to enter the pores of the molecular sieve, which not only blocks the pores of the molecular sieve, reduces the pore volume and specific surface area of ​​the molecular sieve, but also covers part of the acid center, which affects the catalytic performance of the molecular sieve. It also affects the modification process of molecular sieves, so t...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Composite carrier material A prepared according to the method provided by the present invention.

[0021] Add 1000g of amorphous silica-alumina (30wt% silicon dioxide content) to 2 liters of distilled water, stir and beat to form a slurry (a), dissolve 100g of polyoxyethylene amide in 1L of water to form a solution (b), take 250 grams Industrially produced NaY zeolite (SiO 2 / A1 2 o 3 =5.0 (molar ratio), unit cell constant is 2.463nm, Na 2 O content is 9wt%), with 2500ml 10% NH 4 NO 3 The aqueous solution was exchanged at 90°C for 1 hour, and then 2500ml of oxalic acid with a pH value of 2 and NH 4 NO 3 The mixed solution was exchanged twice, and the slurry (a) and solution (b) were added at the same time, and then the first hydrothermal treatment was carried out at 0.098 MPa and 550°C for 2 hours, and then 10% NH 4 NO 3 Aqueous solution is exchanged to Na 2 After O3 The aqueous solution was exchanged, filtered, washed with water, and dried at 120° C. for 4 hou...

Embodiment 2

[0023] Composite carrier material B prepared according to the method provided by the present invention.

[0024] Add 1000g of amorphous silica-alumina (30wt% silicon dioxide content) into 2 liters of distilled water, stir and beat to form a slurry (a), dissolve 120g of polyethylene glycol ether in 1L of water to form a solution (b), take 250 grams of industrially produced NaY zeolite (SiO 2 / A1 2 o 3 =5.0 (molar ratio), unit cell constant is 2.463nm, Na 2 O content is 9wt%), with 2500ml 10% NH 4 NO 3The aqueous solution was exchanged at 90°C for 1 hour, and then 2500ml of oxalic acid with a pH value of 2 and NH 4 NO 3 The mixed solution was exchanged twice, followed by the first hydrothermal treatment at 0.098 MPa and 550 °C for 2 hours, and then 10 wt% NH 4 NO 3 Aqueous solution is exchanged to Na 2 O3 The aqueous solution was exchanged, filtered, washed with water, and dried at 120° C. for 4 hours to obtain a composite carrier material B.

Embodiment 3

[0026] Composite carrier material C prepared according to the method provided by the present invention.

[0027] Add 1000g of amorphous silica-alumina (silica content: 20wt%) to 2 liters of distilled water, stir and beat to form a slurry (a), dissolve 150g of polyoxyethylene amine in 1L of water to form a solution (b), take 250 grams Industrially produced NaY zeolite (SiO 2 / A1 2 o 3 =5.0 (molar ratio), unit cell constant is 2.463nm, Na 2 O content is 9wt%), with 2500ml 10% NH 4 NO 3 The aqueous solution was exchanged at 90°C for 1 hour, and then 2500ml of oxalic acid with a pH value of 2 and NH 4 NO 3 The mixed solution was exchanged twice, and the slurry (a) and solution (b) were added at the same time, and then the first hydrothermal treatment was carried out at 0.098 MPa and 550°C for 2 hours, and then 10% NH 4 NO 3 Aqueous solution is exchanged to Na 2 After O3 The aqueous solution was exchanged, filtered, washed with water, and dried at 120° C. for 4 hours to ob...

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PUM

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Abstract

The invention discloses a carrier material containing a molecular sieve and amorphous silica-alumina and a preparation method thereof. The preparation method is characterized in that in NaY molecular sieve modification, before final hydrothermal treatment, amorphous silica-alumina slurry and a surfactant are introduced so that the molecular sieve and the amorphous silica-alumina are dispersed uniformly and molecular sieve agglomeration or channel blocking is avoided, and thus a specific surface area and a pore volume of the carrier material are improved and catalyst performances are improved. The carrier material is especially suitable for being used as a carrier component of a hydrocracking catalyst.

Description

technical field [0001] The present invention relates to a composite carrier material and its preparation method, in particular to a carrier material containing molecular sieve and amorphous silica-alumina and its preparation method, especially for hydrocracking catalyst containing Y-type molecular sieve-amorphous A silica-alumina catalyst carrier material and a preparation method thereof. Background technique [0002] In general, a hydrocracking catalyst is a catalyst that has both cracking and hydrogenation-dehydrogenation functions. The cracking function is provided by an acidic carrier, while the hydrodehydrogenation function is provided by an active metal. Most of the acidic carrier is alumina or amorphous silica-alumina as the carrier, together with a certain amount of molecular sieve. The basic preparation process is to first Alumina or silicon-containing alumina is directly mixed with molecular sieve and other additives, then shaped, dried and fired, and finally impr...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J29/08B01J35/10C10G47/16
Inventor 孙晓艳樊宏飞王占宇
Owner CHINA PETROLEUM & CHEM CORP
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