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Rare earth-containing Y-type molecular sieve cracking catalyst and preparation method thereof

A cracking catalyst, molecular sieve technology, applied in the direction of molecular sieve catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of small total pore volume and specific surface area of ​​cracking catalyst, poor wear resistance, etc., to reduce production costs and Effects of low pressure, coke yield and heavy oil yield, and good abrasion resistance for subsequent waste treatment

Active Publication Date: 2012-12-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the method of the above-mentioned patent application overcomes the defects of excessive use of ammonium salt and waste of water resources in the traditional first exchange process, the cracking catalyst prepared according to the method of the above-mentioned patent application has a small total pore volume and a specific surface area, and is resistant to Poor abrasive defects

Method used

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  • Rare earth-containing Y-type molecular sieve cracking catalyst and preparation method thereof
  • Rare earth-containing Y-type molecular sieve cracking catalyst and preparation method thereof
  • Rare earth-containing Y-type molecular sieve cracking catalyst and preparation method thereof

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preparation example Construction

[0015] The preparation method of the Y-type molecular sieve cracking catalyst containing rare earth according to the present invention comprises the following steps:

[0016] (1) mixing the NaY molecular sieve without ion exchange with the substrate, beating and spray-drying to form a catalyst precursor;

[0017] (2) performing a first calcination on the catalyst precursor at a temperature of 200°C to less than 400°C, and performing ammonium ion exchange on the product obtained after the first calcination; and

[0018] (3) subjecting the product obtained after the ammonium ion exchange to at least one second roasting and at least one rare earth ion exchange, the rare earth ion exchange being performed after the second roasting;

[0019] The temperature of the ammonium ion exchange is higher than the temperature of the rare earth ion exchange, and the temperature of the ammonium ion exchange is 100-200°C; the temperature of the second calcination is higher than the temperature ...

Embodiment 1

[0045] This example is used to illustrate the rare earth-containing Y-type molecular sieve cracking catalyst and its preparation method provided by the present invention.

[0046] (1) Preparation of catalyst precursor

[0047] Mix 3000g kaolin (purchased from Suzhou Kaolin Co., Ltd. on a dry basis), 300g aluminum sol (purchased from Sinopec Catalyst Qilu Branch in terms of alumina) and 4500g decationized water, and beat to obtain slurry M1; Bauxite (calculated as alumina, purchased from Shandong Aluminum Works), 10000g decationized water and 310ml hydrochloric acid (HCl content is 36% by weight) are mixed, beating to obtain slurry M2; M1 and M2 are mixed, stirred evenly, Stand at ℃ for aging for 1 hour, add 1550 g of NaY molecular sieve without ion exchange (on a dry basis, purchased from Sinopec Catalyst Qilu Branch) under stirring, stir evenly, and then carry out spray-drying molding to obtain a catalyst precursor.

[0048] (2) The first ion exchange

[0049] 150 g of the ...

Embodiment 2

[0061] This example is used to illustrate the rare earth-containing Y-type molecular sieve cracking catalyst and its preparation method provided by the present invention.

[0062] (1) Preparation of catalyst precursor

[0063] 3000g kaolin (on a dry basis, purchased from Suzhou Kaolin Co.), 1500g deionized water and 452ml hydrochloric acid (HCl content is 36% by weight) were mixed, beaten, and then added 2000g pseudoboehmite (calculated on alumina, purchased From Shandong Aluminum Works), stirred for 1 hour, left to age at 60-70° C. for 1 hour, added 3550 g of ion-exchanged NaY molecular sieves (on a dry basis, purchased from Sinopec Catalyst Qilu Branch) under stirring, and stirred homogeneous, and then spray-dried to obtain a catalyst precursor.

[0064] (2) The first ion exchange

[0065]150 g of the catalyst precursor prepared in (1) was calcined at 390° C. for 0.5 hours, and then the calcined catalyst precursor was beaten with 1500 mL of decationized water, and 100 mL o...

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Abstract

The invention relates to a preparation method of a rare earth-containing Y-type molecular sieve cracking catalyst. The preparation method comprises the steps: (1), mixing NaY molecular sieve without ion exchange and a matrix, pulping, spray-drying and molding to obtain a catalyst precursor; (2), firstly calcining the catalyst precursor at 20-400 DEG C; performing ammonium ion exchange on the calcined product; (3), performing second calcining and at least one rare-earth ion exchange on the product after ammonium ion exchange, wherein the rare-earth ion exchange is performed after the second calcining; the temperature of the ammonium ion exchange is more than that of the rare-earth ion exchange; and the second calcining temperature is more than that of the first calcining temperature. The invention also relates to a Y-type molecular sieve cracking catalyst obtained by the method. The rare earth-containing Y-type molecular sieve cracking catalyst obtained by the method provided by the invention has big total hole volume and specific surface area and has good wearing resistance.

Description

technical field [0001] The invention relates to a preparation method of a rare earth-containing Y-type molecular sieve cracking catalyst and the rare-earth-containing Y-type molecular sieve cracking catalyst prepared by the method. Background technique [0002] As raw oil becomes heavier and people's awareness of environmental protection continues to strengthen, it not only requires catalytic cracking catalysts to have good reaction selectivity, activity and stability, but also requires more and more stringent requirements for the preparation process of catalysts. [0003] In the production of catalytic cracking catalysts, the traditional preparation process of zeolite-containing cracking catalysts can be roughly divided into two categories: one is the first exchange process, that is, the zeolite is ion-exchanged or modified first, and then added to the matrix to be spray-dried and formed (with or without roasting); the other is the post-exchange process, that is, the unexch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10B01J37/30C10G11/05
Inventor 张杰潇许明德田辉平于善青
Owner CHINA PETROLEUM & CHEM CORP
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