Y-type molecular sieve-containing hydrocracking catalyst carrier and preparation method thereof

A catalyst carrier, hydrocracking technology, applied in molecular sieve catalyst, catalyst carrier, physical/chemical process catalyst, etc., can solve the problem of difficult molecular sieve cracking performance, affecting the distribution of B acid and L acid, removing non-framework aluminum, etc. The effect of promoting hydrogenation performance, improving acidity and acid distribution, and increasing specific surface area

Active Publication Date: 2010-12-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using aluminum salt alone can also partially remove the non-framework aluminum formed after hydrothermal treatment, but because the pH value of the aluminum salt solution is generally between 2 and 3, it is not enough to remove a large amount of non-framework aluminum, so that part of the aluminum in the micropores The difficult-to-remove non-skeleton aluminum remains in the molecular sieve, which causes partial acid centers of the molecular sieve to be masked, and also affects the distribution of B acid and L acid, making it difficult to maximize the cracking performance of the molecular sieve

Method used

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  • Y-type molecular sieve-containing hydrocracking catalyst carrier and preparation method thereof
  • Y-type molecular sieve-containing hydrocracking catalyst carrier and preparation method thereof

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Effect test

Embodiment 1

[0038] Take 3000gNa 2 O content is 2.8wt% (dry basis 70.3wt%) raw material NH 4 NaY, put it into a flask with a reflux device and can be sealed, use 11700ml deionized water to make a slurry, and rapidly raise the temperature to 95 ° C under the condition of stirring, and then add dropwise at a uniform speed within 2 hours. Ammonium fluorosilicate and 4500 ml of deionized water are used to form an aqueous solution. After the addition, the slurry is kept at a constant temperature of 95° C. for 2 hours while stirring. Stop stirring, let it stand for 10 minutes, separate the molecular sieve in the upper part of the flask by decantation, wash it with water three times and then filter it. The filter cake is dried in an oven at 120°C for 5 hours, and the code is SSY-1. The obtained SSY-1 molecular sieve is analyzed by X-ray diffraction (XRD) and plasma emission spectrum, and its unit cell parameter is 2.450nm, relative crystallinity 98%, Na 2 The O content is 0.1 wt%.

Embodiment 2

[0040] Weigh 300g of SSY-1 molecular sieve and put it into a tubular hydrothermal treatment furnace, raise the temperature to 550°C, and treat it at a gauge pressure of 0.1MPa for 1.5 hours, then put it into a closed flask with a reflux device, and add a concentration of 0.9mol / L aluminum sulfate and 0.3mol / L sulfuric acid mixed aqueous solution 1500ml, stir at 95°C for 2 hours, filter, and wash the filter cake with hot deionized water, stop washing when the pH value of the washing liquid is close to 7. The filter cake was dried in an oven at 120°C for 5 hours. No. LSY-1, see Table 1 for molecular sieve properties.

Embodiment 3

[0042] Weigh 300g of SSY-1 molecular sieve and put it into a tubular hydrothermal treatment furnace, raise the temperature to 570°C, treat it for 2 hours under a gauge pressure of 0.2MPa, then put it into a closed flask with a reflux device, add a concentration of 0.6mol / L aluminum sulfate and 0.2mol / L citric acid mixed aqueous solution 6000ml, stir at 100°C for 1 hour, filter, and wash the filter cake with hot deionized water, stop washing when the pH value of the washing liquid is close to 7. The filter cake was dried in an oven at 120°C for 5 hours. No. LSY-2, see Table 1 for molecular sieve properties.

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Abstract

The invention relates to a Y-type molecular sieve-containing hydrocracking catalyst carrier and a preparation method thereof. The carrier consists of a modified Y-type molecular sieve and alumina, wherein the Y-type molecular sieve is obtained by the treatment by mixed aqueous solution of an aluminum salt and an acid and by hydrothermal treatment and has the properties of a specific surface of between 750 and 850m<2> / g, a total pore volume of between 0.35 and 0.48ml / g, a relative crystallinity of between 90 and 130 percent, a cell parameter of between 2.437 and 2.445nm, a silicon to aluminum molar ratio of between 15 and 70, an infrared acidity of between 0.5 and 1.0 mmol / g, a Bronsted acid to Lewis acid ratio of more than 7.0 and a sodium oxide content of less than or equal to 0.05 weight percent. The carrier can be used in the preparation of a hydrocracking catalyst, and the obtained catalyst has the characteristics of excellent catalytic activity, high heavy naphtha selectivity, high yield, high aromatic hydrocarbon potential content of the heavy naphtha and the like.

Description

technical field [0001] The invention relates to a hydrocracking catalyst carrier containing Y molecular sieve and a preparation method thereof. Background technique [0002] The carrier is an important part of the catalyst. It not only provides a place for the metal active components to disperse, but also participates in the reaction itself, and completes the entire catalytic reaction together with other active components. Existing hydrogenation catalyst supports generally contain molecular sieves, alumina, and other refractory oxides, and are generally used in processes such as hydrocracking of heavy oil, hydrogenation of distillate oil to remove impurities, and hydrogenation of inferior diesel oil. [0003] With the rapid development of my country's national economy, the market demand for various chemical raw materials, especially aromatic hydrocarbon raw materials, will continue to grow for a long period of time now and in the future. The catalytic reforming technology fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J29/08
Inventor 刘昶王凤来关明华杜艳泽
Owner CHINA PETROLEUM & CHEM CORP
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