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Hydro-cracking catalyst and preparation method thereof

A hydrocracking and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of high preparation cost, difficult realization, and low crystallization retention of small-grain Y-type molecular sieve, etc. Achieve the effects of promoting hydrogenation performance, increasing silicon-aluminum ratio, improving acidity and acid distribution

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Hydro-cracking catalyst and preparation method thereof

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preparation example Construction

[0037] The preparation method of small grain NaY type molecular sieve of the present invention specifically comprises the following steps:

[0038] A. Preparation of directing agent at low temperature.

[0039] 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.

[0040] B. Preparation of gel at low temperature.

[0041] Mix water glass, aluminum sulfate solution, low-alkali sodium metaalu...

Embodiment 1

[0058] This example is to prepare NaY molecular sieve with small crystal grains as raw material.

[0059] The raw materials used are as follows:

[0060] 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.

[0061] Preparation of LY-1:

[0062] 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.

[0063] B. Preparation of the gel: Add 59.4ml of aluminum ...

Embodiment 2

[0070] 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 2,000 grams of small-grain NaY molecular sieves, dissolve them 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 sieves, and leave a small sample to analyze 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.

[0071] 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, then stir at constant temper...

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Abstract

The invention discloses a hydro-cracking catalyst and a preparation method thereof. The catalyst comprises hydrogenated active metal ingredients and carriers containing small grain Y molecular sieves, amorphous silica-alumina and alumina, wherein the small grain Y molecular sieves are obtained by treating hydrothermally treated Y molecular sieves by using mixed aqueous solution of aluminum salt and acid. The Y molecular sieves have small grains, high crystallization degree, high silica-alumina ratio and proper total acid amount and acid distribution; the Y molecular sieves and the amorphous silica-alumina are used as acid components of the catalyst together; and the prepared catalyst can treat heavier and / or poor-quality raw materials, and has the characteristics of high catalytic activity, good selectivity of intermediate fraction 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 with high activity and high yield of middle distillate oil and a preparation method thereof. Background technique [0002] The continuous development of the world economy has made the international oil market more interested in high-quality middle distillate oil products (mainly including the main power fuel for marine and land transportation and agricultural and construction machinery--diesel, the power fuel for the aviation industry--jet fuel and household heating in winter Oil) demand has been increasing. Due to the rapid economic development in our country, this demand is even stronger. In addition, in order to protect the ecological environment on which human beings depend, higher and higher requirements are put forward for the quality of fuel, and the production and use of clean fuel has become the mainstream of developme...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J35/02B01J37/00C10G47/20
Inventor 王凤来刘昶杜艳泽关明华
Owner CHINA PETROLEUM & CHEM CORP
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