Hydrocracking catalyst containing small crystal grain Y-shaped molecular sieve and preparation method thereof

A hydrocracking and catalyst technology, applied in molecular sieve catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of difficult realization, low crystal retention of small-grain Y-type molecular sieves, and high preparation costs. Improve acidity and acid distribution, reduce secondary cracking, uniform distribution effect

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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AI Technical Summary

Problems solved by technology

The small-grain Y-type molecular sieve prepared by the raw material has a low degree of crystallization retention, and the modification method adopted has high preparation costs and is difficult to realize industrially.

Method used

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  • Hydrocracking catalyst containing small crystal grain Y-shaped molecular sieve and preparation method thereof

Examples

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preparation example Construction

[0033] The preparation method of the small-grain NaY type molecular sieve for the catalyst of the present invention specifically comprises the following steps:

[0034] A. Preparation of directing agent at low temperature.

[0035] According to Na 2 O:Al 2 o 3 : SiO 2 :H 2 O=10~20: 1: 10~20: 300~400 feed molar ratio, at a temperature above 0°C and less than 15°C, preferably at a temperature of 0°C to 10°C, the water glass is slowly stirred under the condition of stirring Add it into the high-alkaline sodium metaaluminate solution and mix evenly, then stir at the above temperature at a constant temperature and speed for 0.5-2 hours; then seal the mixed solution in a synthesis kettle, and age it at a static temperature for 10-14 hours to obtain a directing agent The directing agent is preferably added with 20% to 40% of the weight of the directing agent before use.

[0036] B. Preparation of gel at low temperature.

[0037] Mix water glass, aluminum sulfate solution, low-...

Embodiment 1

[0051] This example is to prepare NaY molecular sieve with small crystal grains as raw material.

[0052] The raw materials used are as follows:

[0053] High alkali sodium metaaluminate: Na 2 O content 291g / L, Al 2 o 3 Content 42g / L; low alkali sodium metaaluminate: Na 2O content 117g / L, Al 2 o 3 Content 77g / L; water glass: SiO 2 Content 250g / L, modulus 3.2; aluminum sulfate: Al 2 o 3 Content 90g / L.

[0054] Preparation of LY-1:

[0055] A. Preparation of directing agent: Slowly add 1200ml of water glass into 800ml of high alkali sodium metaaluminate under stirring condition at 10°C. After adding water glass, stir at constant temperature for 40 minutes. Stirring was stopped, and the mixed solution was sealed in a container, and aged at a temperature of 5°C for 12 hours at a constant temperature. After the constant temperature is finished, add 667ml of clean water to the mixed solution as a guiding agent.

[0056] B. Preparation of the gel: Add 59.4ml of aluminum s...

Embodiment 2

[0063] Firstly, ammonium exchange is carried out on the raw material small-grain NaY molecular sieve LY-1. The preparation concentration is 10 liters of 0.5mol / l ammonium nitrate aqueous solution. Weigh 1,000 grams of small-grain NaY molecular sieve, dissolve it in 10 liters of prepared ammonium nitrate aqueous solution, stir at 90°C for 1 hour at a constant temperature of 300 rpm, then filter the molecular sieve, and leave a small sample for analysis of NaY 2 O content; repeat the above operation until Na in the molecular sieve 2 The O content reaches 2.5-5wt%, and the sample number obtained after drying is LNY-1.

[0064] Measure 1 liter of clean water and dissolve 200 grams of LNY-1 in the clean water, heat up and stir rapidly, the temperature is 95°C, and the stirring speed is 300rpm. In 2 hours, add ammonium hexafluorosilicate aqueous solution to the molecular sieve slurry at a uniform speed, add 50 grams of ammonium hexafluorosilicate in total, then stir at constant te...

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Abstract

The invention discloses a hydrogenation catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metal components and a carrier consisting of the small crystal grain Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide, wherein the small crystal grain Y-shaped molecular sieve is a small crystal grain Y-shaped molecular sieve subjected to hydro-thermal treatment. The hydrocracking catalyst provided by the invention has the characteristics of high catalyst activity, excellent target product selectivity, great preparation flexibility, and the like, thus the catalyst can be used for preparing products such as heavy naphtha, aviation kerosene, diesel oil and the like with high yield and good product quality.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst containing small-grain Y molecular sieves 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 environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J35/02B01J37/00C10G47/20
Inventor 王凤来杜艳泽刘昶关明华
Owner CHINA PETROLEUM & CHEM CORP
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