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Hydrocracking catalyst and preparation method thereof

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

Active Publication Date: 2009-03-11
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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  • Hydrocracking catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 2000gNa 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 7800ml deionized water to make a slurry, and rapidly heat up to 95°C under stirring conditions, and then dropwise add 453 grams of six in 2 hours at a uniform speed Ammonium fluorosilicate and 3000 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 and filter with water three times, and dry the filter cake 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 200g of SSY-1 molecular sieve and put it into a tubular hydrothermal treatment furnace, raise the temperature to 600°C, and treat it at a gauge pressure of 0.2MPa for 2.5 hours, then put it into a closed flask with a reflux device, and add a concentration of 0.8mol / L aluminum sulfate and 0.3mol / L sulfuric acid mixed aqueous solution 1800ml, stirred at 90°C for 2 hours, filtered, and washed the filter cake with hot deionized water, and stopped washing when the pH value of the washing liquid was close to 7. The filter cake was dried in an oven at 120°C for 5 hours. No. LSY-4, see Table 1 for molecular sieve properties.

Embodiment 3

[0045] Weigh 200g of SSY-1 molecular sieve and put it into a tubular hydrothermal treatment furnace, raise the temperature to 620°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 0.6mol / L aluminum sulfate and 0.3mol / L sulfuric acid mixed aqueous solution 1400ml, 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-5, molecular sieve properties are shown in Table 1.

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Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metals and a carrier containing modified Y molecular sieve, alumina and amorphous aluminium silicon, wherein, the Y molecular sieve is prepared by the following method: the Y molecular sieve undergone hydro-thermal treatment by mixed water solution of aluminium salt and acid is adopted; the performance of the Y molecular sieve is as follows: specific surface is 800m<2> / g-900m<2> / g, total aperture volume is 0.40ml / g-0.50ml / g, relative crystallinity is 90%-130%, cell parameter is 2.434-2.440nm, aluminium silicon mol ratio is 20-100, infrared acid volume is 0.3-0.8mmol / g, the mol ratio of acid B and acid L is above 7.0, sodium oxide content is less than or equal to 0.05wt%. The catalyst prepared by the invention has the advantages of high catalytic activity, good target product selectivity and can produce heavy naphtha, aviation fuel and diesel fuel, and the like, with high yield and good quality.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst capable of producing heavy naphtha, jet fuel and diesel oil and a preparation method thereof. Background technique [0002] The main features of hydrocracking technology are strong adaptability of raw materials, flexible product schemes, high selectivity of target products, good product quality and high added value, etc., and can directly produce a variety of high-quality petroleum products (such as gasoline, jet fuel, diesel oil, lubricating oil, etc.) Base oil, etc.) and high-quality chemical raw materials (such as raw materials for the production of benzene, toluene, xylene, ethylene, etc.). Therefore, as the quality of crude oil deteriorates year by year, the market demand for high-quality petroleum products and high-quality chemical raw materials continues to grow, and new environmental protection regulations have been prom...

Claims

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Application Information

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IPC IPC(8): B01J29/10B01J29/16C10G47/20
Inventor 王凤来杜艳泽关明华刘昶
Owner CHINA PETROLEUM & CHEM CORP
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