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Hydrocracking catalyst containing Y molecular sieve and preparation method thereof

A hydrocracking and molecular sieve technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems affecting the distribution of B acid and L acid, difficult molecular sieve cracking performance, and removal of non-framework aluminum, etc. Achieve the effect of promoting hydrogenation performance, improving activity and heavy naphtha selectivity, and increasing specific surface area

Active Publication Date: 2009-06-10
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Hydrocracking catalyst containing Y molecular sieve and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0041] Take 3000gNa 2 O content is the raw material NH4NaY of 2.8wt% (70.3wt% on a dry basis), puts into with reflux device and can airtight flask, makes a slurry with 11700ml deionized water, and is warming up to 95 ℃ rapidly under the condition of stirring, then Add an aqueous solution composed of 680 g of ammonium hexafluorosilicate and 4500 ml of deionized water dropwise within 2 hours at a uniform speed, and keep the slurry 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

[0043] 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

[0045] 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 discloses a hydrocracking catalyst for producing heavy naphtha in great abundance and a preparation method thereof. The catalyst contains hydrogenation active metals and a carrier which consists of modified Y molecular sieves and alumina, wherein the Y molecular sieves are obtained by using a mixed aqueous solution of aluminum salts and an acid to perform hydro-thermal treatment. The properties of the modified Y molecular sieves are as follows: the specific surface area is between 750 m<2> / g and 850 m<2> / g; the total pore volume is between 0.35 and 0.48 ml / g; the relative crystallinity is between 90 and 130 percent; the cell parameter is between 2.437 and 2.445 nanometers; the silicon-aluminum mol ratio is between 15 and 70; the infrared acid amount is between 0.5 and 1.0 mmol / g; the B acid / L acid is more than 7.0; and the content of sodium oxide is less than or equal to 0.05 weight percent. The hydrocracking catalyst has the characteristics of good catalytic activity, high heavy naphtha selectivity, high yield, high latent content of heavy naphtha arene, and so on.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst for prolific catalytic reforming raw material (heavy naphtha) and a preparation method thereof. Background technique [0002] 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 for the production of aromatic hydrocarbon raw materials is developing rapidly, which makes Demand for heavy naphtha, which can be used as a feedstock for catalytic reforming, has also increased significantly. As one of the main means of lightening heavy oil, hydrocracking technology is the most suitable refining technology to rationally utilize limited petroleum resources and increase the production of high-quality heavy naphtha. Hydrocracki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G47/16
Inventor 王凤来刘昶关明华杜艳泽
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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