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A kind of 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 affecting the framework structure of molecular sieves, low catalytic activity of catalysts, and reducing the crystallinity of molecular sieves. and acid density distribution, high catalytic activity and isomerization ability, and the effect of improving product selectivity

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is to burn the original powder of β molecular sieve at high temperature to remove the template agent, which will affect the skeleton structure of the molecular sieve, greatly reduce the crystallinity of the molecular sieve, and also affect the acidity of the molecular sieve. The catalytic activity of the catalyst prepared by this method is not high. , the product quality of aviation fuel and diesel middle distillates still needs to be further improved

Method used

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  • A kind of hydrocracking catalyst and preparation method thereof
  • A kind of hydrocracking catalyst and preparation method thereof
  • A kind of hydrocracking catalyst and preparation method thereof

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preparation example Construction

[0039] The preparation method of the used β molecular sieve of hydrocracking catalyst carrier of the present invention specifically comprises the following steps:

[0040] (1) Contact the original powder of β molecular sieve with normal pressure and dynamic water vapor, the contact temperature is 500~650℃, and the time is 5~10 hours;

[0041] (2) Contacting the product obtained in step (1) with ammonium fluorosilicate, then filtering, washing with water and drying to obtain β molecular sieve.

[0042] In step (1), the method of contacting the original powder of β molecular sieve with normal pressure and dynamic water vapor is preferably to place the original powder of β molecular sieve in a container, then introduce water vapor from one end of the container, and pass through the original powder of β molecular sieve from The other end of the container is drained. In order to make the molecular sieve treatment more uniform, it is best to place the molecular sieve in a rotating ...

Embodiment 1

[0069] Take the original powder of β molecular sieve (synthesized by hydrothermal method using tetraethylammonium hydroxide as template agent, the weight content of the template agent in the original powder of β molecular sieve is about 11.8%, provided by Sinopec Catalyst Fushun Branch), its chemical SiO 2 / Al 2 o 3 The molar ratio is 25.5, Na 2 O content is 2.45wt%, in its skeleton structure, through 29 Si MAS NMR spectrum, the distribution of silicon atoms in different coordination states is obtained as follows: Si (4Al) is 7.6%, Si (3Al) is 30.6%, Si (2Al) is 32.3%, Si (1Al) is 21.0% %, Si (0Al) is 8.5%. Take 1000g of the above-mentioned β molecular sieve raw powder, put it into a tube furnace, adopt the method of temperature program (heating rate is 100°C / hour), and start to introduce 100wt% water vapor when the temperature of the tube furnace rises to 300°C, water vapor The flow rate is 50L / hour, the tube furnace is heated to 550°C, and the constant temperature time ...

Embodiment 2

[0071] Get the former powder of β molecular sieve with embodiment 1. Take 1000g of the above-mentioned molecular sieve, put it into a tube furnace, adopt the method of temperature program (heating rate: 100°C / hour), and start to introduce 100wt% water vapor when the temperature of the tube furnace rises to 300°C, the flow rate of water vapor is 70L / hour, the tube furnace is heated to 600°C, and the constant temperature time is 8 hours. The obtained molecular sieve number is BS-2.

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Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst includes a hydrogenation active metal component and a carrier containing β molecular sieve, Y-type molecular sieve and alumina, wherein the properties of the β molecular sieve used are as follows: SiO 2 / Al 2 o 3 The molar ratio is 30~150, the non-framework aluminum accounts for less than 2% of the total aluminum, and the silicon atoms coordinated by the Si(0Al) structure account for more than 95% of the silicon atoms in the skeleton structure. The preparation method includes: β molecular sieve, Y type molecular sieve and aluminum oxide are mixed and kneaded to form a carrier, and the hydrogenation active metal component is loaded by a conventional method. The catalyst of the invention uses beta molecular sieve and Y-type molecular sieve together as the cracking component, and the prepared catalyst has the characteristics of high activity, high-quality middle distillate oil production, and high-quality hydrogenation tail oil.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst which adopts β and Y-type molecular sieve composite components as the main cracking components, and is suitable for preparing high-quality middle distillates with high yields and a preparation method thereof. Background technique [0002] In recent years, the demand for high-quality middle distillate products in oil markets around the world has been growing continuously. With the rapid development of economy, this contradiction between supply and demand has become more prominent. With its unique advantages, hydrocracking technology has become the best means for deep processing of heavy oil to produce high-quality clean middle distillate. [0003] At present, the activity of medium-oil hydrocracking catalysts in various countries in the world is not very high, and the freezing point of the obtained diesel oil is also high, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G47/20
Inventor 刘昶王珂琦王凤来杜艳泽赵红关明华
Owner CHINA PETROLEUM & CHEM CORP
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