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Hydrocracking catalyst carrier and preparation method thereof

A catalyst carrier, hydrocracking technology, applied in the direction of catalyst carrier, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of general middle distillate product quality, low catalyst catalytic activity, and reduced molecular sieve crystallinity, etc. Good cracking effect, suitable acidity and acid distribution, favorable for adsorption

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is to burn the original powder of the β molecular sieve to remove the template agent, which will greatly reduce the crystallinity of the molecular sieve, and also affect the acidity of the molecular sieve. In combination with other components, the catalytic activity of the catalyst is not high. The product quality of middle distillates is average and needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The modified β molecular sieve of the present invention is synthesized by using tetraethylammonium hydroxide as a template and adopting a hydrothermal crystallization method. Take industrial synthetic β molecular sieve raw powder slurry 10000mL, which contains about 2000g of solid phase β molecular sieve, its chemical silicon aluminum SiO 2 / Al 2 o 3 (Molar ratio) The ratio is 27.49, and the specific surface area is 101m 2 / g, the pore volume is 0.19cm 3 / g, the sodium oxide content is 3.67wt%. Add an appropriate amount of clean water and a certain amount of ammonium nitrate to the slurry, so that the liquid-solid ratio (weight) is 10:1, the concentration of ammonium nitrate is 2mol / L, stir, heat up to 95-100°C, and stir at a constant temperature 2 hours, then filter, the filter cake is subjected to ammonium exchange for the second time, the exchange conditions are the same as the first time, and finally wash the β molecular sieve until the pH value is neutral, put ...

Embodiment 2

[0048] Take 200g of B-1 as a raw material, and carry out hydrothermal treatment on B-1 at a water vapor pressure of 0.15MPa, a treatment temperature of 550°C, and a treatment time of 2 hours. The obtained molecular sieve is B-2, and its properties are shown in Table 1.

[0049] Take 200g of B-1 as a raw material, and carry out hydrothermal treatment on B-1, at a water vapor pressure of 0.15MPa, a treatment temperature of 650°C, and a treatment time of 2 hours. The obtained molecular sieve is B-3, and its properties are shown in Table 1.

Embodiment 3

[0051] Weigh 60g of B-2 molecular sieve and put it into a closed flask with a reflux device, add 1000ml of aluminum sulfate aqueous solution with a concentration of 0.8mol / L, stir at a constant temperature of 95°C for 1.0 hour, filter, and wash the filter with hot deionized water Cake, stop washing when the pH value of the washing solution is close to 7. The filter cake was dried in an oven at 120° C. for 5 hours to obtain the β-type molecular sieve of the present invention, its number B-4, and the properties of the molecular sieve are shown in Table 1.

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Abstract

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The hydrocracking catalyst carrier comprises: a modified beta molecular sieve, a modified Y type molecular sieve and alumina. Specifically, the modified beta molecular sieve is prepared by: subjecting a crystallized beta molecular sieve slurry directly to ammonium exchange and a template agent removal treatment, then first conducting a hydrothermal treatment, and performing an aluminum salt solution treatment, under the condition of maintaining a high beta molecular sieve crystallinity, removing part of non-framework aluminum uniformly, thus obtaining the beta molecular sieve with the characteristics of high Si / Al ratio, large specific surface area, appropriate acidity and acid distribution, and reasonable pore structure, etc. The modified beta molecular sieve especially has a suitable cracking effect and a very good isomerization effect on long-chain alkane and the long side chain alkyl of aromatic hydrocarbon and cyclane, and has a synergistic effect with the Y type molecular sieve, so that the prepared hydrocracking catalyst can have very high catalytic activity and middle distillate selectivity. And the condensation point of diesel fraction is substantially reduced, and the product properties of middle distillate are improved.

Description

technical field [0001] The invention relates to a hydrocracking catalyst carrier and a preparation method thereof. In particular, beta molecular sieves and Y-type molecular sieves are used as main cracking components, and are suitable for preparing hydrocracking catalysts for producing high-quality middle distillates. 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 is difficult for refineries to improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J35/10B01J29/70B01J29/80C10G47/20
Inventor 刘昶杜艳泽关明华赵红王凤来
Owner CHINA PETROLEUM & CHEM CORP
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