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 the problems of high production cost, low crystallization retention of small-grain Y-type molecular sieves, and difficulty in realization. Achieve high crystallization retention, ensure skeleton continuity, and reduce collapse

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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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 and preparation method thereof

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preparation example Construction

[0033] The preparation method of the small grain NaY type molecular sieve in 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-a...

Embodiment 1

[0053] This example is to prepare NaY type molecular sieve with small crystal grain as raw material.

[0054] The raw materials used are as follows:

[0055] High alkali sodium metaaluminate: Na 2 O content 291g / L, Al 2 o 3 Content 42g / L; low alkali sodium metaaluminate: Na 2 O 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.

[0056] Preparation of LY-1:

[0057] 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.

[0058] B. Preparation of the gel: Add 59.4ml of aluminu...

Embodiment 2

[0065] 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 2000 grams of small-grain NaY-type molecular sieves, dissolve them in 10 liters of prepared ammonium nitrate aqueous solution, stir at a constant temperature of 90 ° C for 1 hour at a stirring speed of 300 ℃, then filter the molecular sieves, and leave a small sample for analysis of Na 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.

[0066] Measure 1 liter of clean water and dissolve 1000 g of LNY-1 in the clean water, heat up and stir rapidly, the temperature is 95°C, and the stirring speed is 300 rpm. 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,...

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Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation activity metals and a carrier consisting of a modified small crystal particle Y-shaped molecular sieve and alumina, wherein the small crystal particle Y-shaped molecular sieve has the following properties: the SiO2/Al2O3 molar ratio is 10.0-120.0, the average diameter of the crystal particles is 100-700nm, the cell parameter is 2.436-2.445nm, sodium oxide is less than or equal to 0.1 weight percent, and the crystal retention rate is over 95 percent. The hydrocracking catalyst has the characteristics of high catalytic activity, high heavy naphtha selectivity, high potential aromatic hydrocarbon content, low bureau of mines correlation index (BMCI) value of hydrocracking tail oil and the like.

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 high-quality heavy naphtha and tail oil with a low BMCI value and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the market demand for chemical products has increased sharply. Among them, the demand for basic chemical raw materials such as triene and triphenyl has become more vigorous, which has also led to the rapid expansion of its production capacity. With the operation and commissioning of multiple sets of large-scale reforming and ethylene units, atmospheric and vacuum units alone can no longer meet the market's requirements for chemical raw materials, and the gap in chemical raw materials is increasing. Among them, naphtha-based chemical light oil The supply of raw materials for production is more urgent. [0003] The hydrocracking catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16B01J35/02C10G47/20
Inventor 王凤来刘昶杜艳泽关明华
Owner CHINA PETROLEUM & CHEM CORP
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