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Y-type molecular sieve modification method and catalytic cracking catalyst preparation method

A molecular sieve and modification technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of poor hydrothermal ultra-stable treatment effect of Y-type molecular sieves, poor structural stability and thermal stability, Problems such as poor sodium ion content effect, to achieve good structural stability and thermal stability, good calcination effect, and improved calcination effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The purpose of the invention is to overcome the poor effect of reducing sodium ion content in the Y-type molecular sieve modification and catalytic cracking catalyst preparation, the Y-type molecular sieve hydrothermal ultra-stable treatment effect is poor, the structural stability and thermal stability are not good, and the roasting quality is not good. For high problems, provide the modification method of Y-type molecular sieve and the preparation method of catalytic cracking catalyst

Method used

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  • Y-type molecular sieve modification method and catalytic cracking catalyst preparation method
  • Y-type molecular sieve modification method and catalytic cracking catalyst preparation method
  • Y-type molecular sieve modification method and catalytic cracking catalyst preparation method

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preparation example Construction

[0081] The present invention also provides a method for preparing a catalytic cracking catalyst, the method comprising: modifying a Y-type molecular sieve to obtain a modified Y-type molecular sieve, and taking the total weight of the catalytic cracking catalyst as a basis, adding 5-50% by weight of The modified Y-type molecular sieve, 0.5-50% by weight of the binder in terms of oxides and 5-90% by weight of the clay mixture are gelled, and the obtained gelled products are sequentially dried and roasted to obtain a roasted product, The roasting temperature of the dried gelled product is 350-400° C., and the roasted product is washed, filtered and dried in sequence. The washing of the roasted product is water washing, and the washing temperature of the roasted product is 20-400° C. 45°C, the weight ratio of the water used for washing the roasted product to the roasted product is 5-20:1; the method for modifying the Y-type molecular sieve is the modification of the Y-type molecul...

Embodiment 1

[0094] This example is used to illustrate the modification method of the Y-type molecular sieve of the present invention.

[0095] Add 50kg NaY molecular sieve (Qilu Catalyst Factory) to the beating tank with 350kg deionized water, add ammonium sulfate 150kg, the weight ratio of water and NaY molecular sieve is 7:1, the weight ratio of ammonium sulfate and NaY molecular sieve is 2.5:1, the first exchange is carried out in the beating tank, the exchange temperature is 60°C, and the exchange time is 1.5 hours. The exchanged NaY molecular sieves enter the flash dryer for drying, the drying temperature is 180° C., and the drying time is 1.2 hours.

[0096] The dried NaY type molecular sieve is put into a roasting furnace as a Y type molecular sieve to be roasted for roasting. Such as figure 1 As shown, the inner diameter of the entire cylinder 2 is 1 m, the length of the entire cylinder 2 is 7 m, wherein the length of each of the feed end 24 and the discharge end 25 is 0.5 m, a...

Embodiment 2

[0103] This example is used to illustrate the modification method of the Y-type molecular sieve of the present invention.

[0104] Add 50kg of NaY molecular sieve (Qilu Catalyst Factory) to the beating tank with 250kg of deionized water, add 25kg of ammonium sulfate, the weight ratio of water to NaY molecular sieve is 5:1, and the weight ratio of ammonium sulfate to NaY molecular sieve is 0.5:1, the first exchange is carried out in the beating tank, the exchange temperature is 60°C, and the exchange time is 1.5 hours. The exchanged NaY type molecular sieves enter the flash dryer for drying, the drying temperature is 200° C., and the drying time is 1 hour.

[0105] The dried NaY type molecular sieve is put into a roasting furnace as a Y type molecular sieve to be roasted for roasting. Such as figure 2 As shown, different from the roasting furnace used in Example 1, the outer diameter of the water vapor distributor 5 is 30 cm. The through-holes 51 are circular holes with a d...

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Abstract

The invention discloses a Y-type molecular sieve modification method and a catalytic cracking catalyst preparation method. The Y-type molecular sieve modification method is characterized in that: a furnace having one or more water vapor distributors and shoveling plates is used, an angle between the extension direction of the shoveling plates and the axial direction of an intermediate cylindrical shell is an acute angle or obtuse angle, improved roasting conditions and secondary exchange conditions are adopted, and the roasting temperature of a Y-type molecular sieve is 400-500DEG C; and the secondary exchange is water washing or acidic solution washing, and the secondary exchange temperature is 20-70DEG C. The Y-type molecular sieve prepared through the modification method has a low Na2O content, and a catalytic cracking catalyst prepared by using the modified Y-type molecular sieve has a good catalysis performance.

Description

technical field [0001] The invention relates to a modification method of a Y-type molecular sieve and a preparation method of a catalytic cracking catalyst. Background technique [0002] Catalytic cracking catalyst is an important secondary processing process in petroleum refining - the catalyst used in the catalytic cracking process. In catalytic cracking catalysts, Y-type molecular sieve is a very widely used material, and it is also a very important active component. The performance of Y-type molecular sieve directly affects the reaction performance of catalytic cracking catalyst. In order to improve the use effect of Y-type molecular sieve, according to different needs, different modifications can be made to Y-type molecular sieve to meet the requirements of use. Many technologies have proposed methods for modifying Y-type molecular sieves. [0003] Usually, in the preparation of catalytic cracking catalyst, the Na of catalytic cracking catalyst is required + The con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J29/08
Inventor 朱玉霞许明德张杰潇周灵萍张蔚琳田辉平
Owner CHINA PETROLEUM & CHEM CORP
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