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A catalytic cracking catalyst

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low conversion rate of heavy oil and low zeolite cracking activity, and achieve high cracking activity of heavy oil, high crystallinity, coke selective effect

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zeolite has low cracking activity and low conversion rate of heavy oil

Method used

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  • A catalytic cracking catalyst
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  • A catalytic cracking catalyst

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Embodiment approach

[0052] In the preparation method of catalytic cracking catalyst provided by the present invention, in the preparation method of phosphorus-containing and rare earth modified Y-type molecular sieve, in step (4), the gas-phase ultrastable modified Y-type molecular sieve obtained in step (3) is mixed with acid solution Contact to react (the present invention is called channel cleaning modification, referred to as channel cleaning, or acid treatment modification). One embodiment, the reaction of the gas-phase ultra-stable modified Y-type molecular sieve obtained in step (3) in contact with the acid solution is to react the gas-phase ultra-stable modified molecular sieve, that is, the gas-phase ultra-stable modified Y-type molecular sieve is mixed with acid solution, and reacts for a period of time, then the molecular sieve after reaction is separated from acid solution, such as through filtration and separation, and then through optional washing (washing is to remove residual Na in...

Embodiment 1

[0070] 2000Kg (dry basis weight) skeleton SiO 2 / Al 2 o 3 Be 4.6 NaY type zeolite (sodium oxide content 13.5% by weight, Sinopec Catalyst Qilu Branch Company produces) joins and is equipped with 20m 3 In the water exchange tank, stir well at 25°C and then add 600L RECl 3 Solution (RECl 3 The rare earth concentration in the solution is expressed as RE 2 o 3 Calculated as 319g / L), after stirring for 60 minutes, filter, wash, and the filter cake is continuously sent to a flash drying oven for drying; obtain a Y-type molecular sieve with a rare earth-containing conventional unit cell size with reduced sodium oxide content, and its sodium oxide content It is 7.0% by weight, and the unit cell constant is 2.471nm. Then, it is sent into a roasting furnace for modification: control the material atmosphere temperature at 390° C., and roast for 6 hours under 50% water vapor (containing 50 volume % water vapor in the atmosphere); then, The molecular sieve material is introduced into...

Embodiment 2

[0075] 2000Kg (dry basis weight) skeleton SiO 2 / Al 2 o 3 Be 4.6 NaY type zeolite (sodium oxide content 13.5% by weight, Sinopec Catalyst Qilu Branch Company produces) joins and is equipped with 20m3 In the primary exchange tank of decationized water, at 90°C, stir well and then add 800L RECl 3 Solution (RECl 3 The rare earth concentration in the solution is expressed as RE 2 o 3 Calculated as 319g / L), stirred for 60 minutes; filtered, washed, and the filter cake was sent to a flash drying oven for drying to obtain a Y-type molecular sieve with a rare earth-containing conventional unit cell size with a reduced sodium oxide content, and its sodium oxide content was 5.5 % by weight, the unit cell constant is 2.471nm; then, it is sent into a roasting furnace, and roasted for 5.5 hours at a temperature (atmosphere temperature) of 450°C and an 80% water vapor atmosphere; then, the molecular sieve material enters the roasting furnace for roasting and drying treatment, and the ro...

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Abstract

The invention provides a catalytic cracking catalyst. The catalytic cracking catalyst contains a secondary-pore-rich modified Y type molecular sieve containing phosphorus and rare earth, an alumina binder and clay. In the modified Y type molecular sieve, the content of rare earth oxide is 4 to 11 wt%; the content of phosphorus is 0.05 to 10 wt%; the content of sodium oxide is no more than 0.5 wt%;a total pore volume is 0.4 to 0.48 mL / g; the pore volume of secondary pores accounts for 20 to 38% of the total pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is no less than 1060 DEG C; and a ratio of the amount of acid B to the amount of acid L is no less than 3.50. The catalyst has higher heavy oil conversion activity, low coke selectivity, and higher gasoline yield, liquefied gas yield, light oil yield and total liquid yield.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Y-type molecular sieves have been the main active component of catalytic cracking (FCC) catalysts since they were first used in the 1960s. However, with the intensification of heavy crude oil, the content of polycyclic compounds in FCC raw materials increased significantly, but their diffusion capacity in zeolite channels decreased significantly. The pore size of Y-type molecular sieve as the main active component is only 0.74nm, and it is directly used to process heavy fractions such as residual oil. The accessibility of the active center of the catalyst will become the main obstacle to the cracking of polycyclic compounds contained therein. [0003] Molecular sieve pore structure is closely related to cracking reaction performance, especially for residual oil cracking catalysts, the secondary pores of molecular sieve can increase th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/088B01J2229/183C10G11/05C10G2300/1055C10G2400/02
Inventor 周灵萍张蔚琳许明德陈振宇田辉平朱玉霞
Owner CHINA PETROLEUM & CHEM CORP
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