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 affecting the diffusion of reactants, reduce catalyst selectivity, etc., and achieve simple process flow and hydrothermal stability Good performance, good isomerization effect

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for large-grained molecular sieves, the larger the particle size, the longer the pores, which not only affects the diffusion of reactants, but also the reactants are prone to multiple cracking reactions in the pores of molecular sieves, reducing the selectivity of the catalyst.

Method used

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  • Hydrocracking catalyst and preparation method thereof
  • Hydrocracking catalyst and preparation method thereof
  • Hydrocracking catalyst and preparation method thereof

Examples

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preparation example Construction

[0048] In the preparation process of the modified Y-type molecular sieve used in the present invention, in the preparation method of the large-grain NaY-type molecular sieve in step (1), Na in the high-alkali sodium metaaluminate solution 2 O content is 260~320g / L, Al 2 o 3 The content is 30~50g / L, and it can be prepared by conventional methods. Na in low alkali sodium metaaluminate solution 2 O content is 100~130g / L, Al 2 o 3 The content is 60~90g / L, and it can be prepared by conventional methods. Al in aluminum sulfate solution 2 o 3 The content is 80~100g / L. SiO in water glass 2 The content is 200~300g / L, and the modulus is 2.8~3.5.

[0049] In the preparation process of the modified Y-type molecular sieve used in the present invention, the preparation method of the large-grain NaY-type molecular sieve in step (1) specifically includes the following steps:

[0050] I. According to Na 2 O: Al 2 o 3 : SiO 2 :H 2 O=10~15:1:10~20:500~600 molar ratio, at 20°C~40°C...

Embodiment 1

[0066] In this example, large-grain NaY molecular sieves were prepared by the method of the present invention.

[0067] Preparation of LY-1

[0068] (1) Preparation of gel: Slowly add 165mL of water glass to 63mL of high alkali sodium metaaluminate solution under stirring condition at a temperature of 25°C. After mixing evenly, add 42.5mL of aluminum sulfate solution and 35.6mL of low Alkaline sodium metaaluminate solution, stirred at constant temperature for 0.5 hours, and then aging the obtained synthetic solution at the above temperature for 1 hour to obtain a gel;

[0069] (2) Crystallization: Under stirring conditions, raise the gel in the synthesis kettle to 100°C at a heating rate of 2.5°C / min, stir and crystallize at a constant temperature for 16 hours, after the crystallization is completed, quickly cool down with cold water, and open the The synthesized molecular sieve was taken out from the synthesis kettle, and the product LY-1 was obtained after filtering, washin...

Embodiment 2

[0084] Firstly, ammonium exchange is carried out on the raw material large-grain NaY molecular sieve LY-1. Prepare 10 liters of 0.5 mol / 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 2.5-5.0wt%, and the sample number obtained after drying is LYN-1.

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Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst adopts a modified Y type molecular sieve and a beta molecular sieve to serve as a cracking center together, wherein the Y type molecular sieve is a large-grained and high-silicon Y type molecular sieve with centralized effective aperture distribution. The hydrocracking catalyst can be used for the hydrocracking process with high yield of high-quality middle distillate oil products, has the characteristics of high activity and good selectivity, and also can produce 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 for producing high-quality low-condensation middle distillates 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. 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 is difficult for refineries to improve the existing equipment or increase the processing capacity to further increase the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G47/20
Inventor 刘昶关明华王凤来杜艳泽黄薇赵红
Owner CHINA PETROLEUM & CHEM CORP
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