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Petroleum hydrocarbon catalytic cracking catalyst

A catalytic cracking and petroleum hydrocarbon technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, hydrocarbon oil cracking, etc., can solve the problems of poor coke selectivity, cracking activity and low gasoline yield

Active Publication Date: 2019-09-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is suitable for the conversion of hydrogenated wax oil, for the conversion of hydrogenated residual oil, the cracking activity and gasoline yield are not high, and the coke selectivity is not good

Method used

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Examples

Experimental program
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Effect test

Embodiment approach

[0046] In the preparation method of the catalytic cracking catalyst provided by the present invention, the preparation method of the rare earth-containing ultra-stable Y-type molecular sieve, an embodiment includes the following steps:

[0047] (1) carry out ion exchange reaction with NaY molecular sieve (also claiming NaY zeolite) and rare earth solution, filter, wash, obtain the Y-type molecular sieve of the conventional unit cell size containing rare earth that sodium oxide content reduces; Said ion exchange is usually stirred, Exchange at a temperature of 15-95°C, preferably 65-95°C, for 30-120 minutes;

[0048] (2) Calcining Y-type molecular sieves with rare earth-containing conventional unit cell size at a temperature of 350-480° C. and containing 30-90% by volume of water vapor for 4.5-7 hours and drying to obtain crystals with reduced sodium oxide content. A Y-type molecular sieve with a reduced cell constant; the cell constant of the Y-type molecular sieve with a redu...

Embodiment 1

[0062] Get 2000 grams of NaY molecular sieves (calculated on a dry basis) and add them to 20 liters of decationized aqueous solution and stir to make them evenly mixed. Add 600ml of RE(NO 3 ) 3 Solution (rare earth solution concentration is RE 2 o 3 Calculated as 319g / L), stirred, heated to 90-95°C and kept for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a unit cell constant of 2.471nm and a sodium oxide content of 7.0% by weight. 2 o 3 A Y-type molecular sieve with a total rare earth content of 8.8% by weight is then calcined for 6 hours at a temperature of 390°C in an atmosphere containing 50% by volume of water vapor and 50% by volume of air to obtain a Y-type molecular sieve with a unit cell constant of 2.455nm. After that, carry out Drying process, so that its water content is less than 1% by weight, and then according to SiCl 4 : Y-type molecular sieve (dry basis) = 0.5: 1 weight ratio, feed SiCl vaporized by heating 4 Gas, at a t...

Embodiment 2

[0065] Get 2000 grams of NaY molecular sieves (on a dry basis) and add them to 25 liters of decationized aqueous solution and stir to make them evenly mixed. Add 800 ml of RECl 3 solution (in RE 2 o 3 The calculated solution concentration is: 319g / L), stirred, heated up to 90-95°C for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a unit cell constant of 2.471nm and a sodium oxide content of 5.5% by weight , with RE 2 o 3 A Y-type molecular sieve with a total rare earth content of 11.3% by weight is then calcined at a temperature of 450°C and 80% water vapor for 5.5 hours to obtain a Y-type molecular sieve with a unit cell constant of 2.461nm, and then dried to reduce its water content at 1 wt%, then follow SiCl 4 : Y-type zeolite = 0.6:1 weight ratio, feed SiCl vaporized by heating 4 The gas was reacted for 1.5 hours at a temperature of 480° C., and then washed with 20 liters of deionized water, and then filtered to obtain a modified Y-ty...

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Abstract

A petroleum hydrocarbon catalytic cracking catalyst comprises a carrier, a Y-type molecular sieve, a mesoporous molecular sieve with a M41S structure and a molecular sieve with a pore opening diameterof 0.59-0.73 nanometer. The Y-type molecular sieve comprises an ultra-stable Y-type molecular sieve containing rare earth, the total pore volume is 0.33-0.39 ml / g, the pore volume of secondary poreswith pore diameters of 2-100 nm accounts for 10-25% of the total pore volume, the unit cell constant is 2.440-2.455 nm, the proportion of non-framework aluminum content to the total aluminum content is not higher than 20%, the lattice collapse temperature is not lower than 1050 DEG C, and the ratio of B acid content to L acid content measured by pyridine adsorption infrared method at 200 DEG C isnot lower than 2.50. The catalyst has high heavy oil conversion activity, good coke selectivity, high gasoline yield, liquefied gas yield, light oil yield and total liquid yield.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon catalytic cracking catalyst. Background technique [0002] Catalytic cracking is an important means of hydrocarbon oil processing. In recent years, the amount of slag mixed with catalytic cracking raw materials has increased. Due to the large proportion of residual oil macromolecules and high aromatic content, it is easy to coke during the reaction process. Higher requirements. In order to improve the processing performance of the residual oil, in the prior art, hydrogenation of the residual oil is followed by catalytic cracking to produce fuels such as gasoline and diesel oil. [0003] At present, the cracking catalysts used to improve the conversion depth of heavy oil all use ultra-stable Y-type molecular sieves in the catalyst. For example, CN1060976, CN1060977, CN1128673, CN1005405, CN1119206, CN1065844, US5340957, US5206194, US4273753, US4438178, US4584287 and US4429053 provide methods for the hyd...

Claims

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Application Information

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IPC IPC(8): B01J29/80C10G47/20
CPCB01J29/005B01J29/041B01J29/088B01J29/185B01J29/7057B01J2229/18B01J2229/20C10G47/20C10G2300/70
Inventor 王鹏田辉平周灵萍姜秋桥孙言严加松宋海涛张久顺
Owner CHINA PETROLEUM & CHEM CORP
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