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Petroleum hydrocarbon catalytic cracking catalyst

A technology of catalytic cracking and petroleum hydrocarbons, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, 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

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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

[0050] In the preparation method of the catalytic cracking catalyst provided by the present invention, the preparation method of the ultra-stable Y-type molecular sieve containing phosphorus and rare earths, an embodiment comprises the following steps:

[0051] (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;

[0052] (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 ...

Embodiment 1

[0066] Get 2000 grams of NaY molecular sieves (calculated on a dry basis) and add them to 20 liters of decationized water 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 cooling, Add molecular sieves to 6 liters of aqueous solution containing 35 grams of phosphoric acid, raise the temperature to 90°C, and perform phosphorus modification treatment for 30 minutes. After that, filter and wash the mole...

Embodiment 2

[0069] Take 2000 grams of NaY molecular sieves (calculated on a dry basis) and add them to 25 liters of decationized water and stir to make them evenly mixed. Add 800ml 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 was then calcined at a temperature of 450° C. under 80% water vapor for 5.5 hours to obtain a Y-type molecular sieve with a unit cell constant of 2.461 nm. After cooling, the molecular sieve was added to a solution containing 268 grams of In 6 liters of ammonium phosphate aqueous solution, the temperature was raised to 60°C, and the phosphorus modification treatment was carried out for 50 minutes. After that, the molecular sieve was filtered and was...

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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 phosphorus and rare earth, the total pore volume of the Y-type molecular sieve is 0.33-0.39 ml / g, the pore volume of secondary pores 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 thetotal 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 is not 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): B01J29/80B01J37/30B01J37/10B01J37/28C10G11/05
CPCB01J29/0341B01J29/045B01J29/088B01J29/7049B01J29/80B01J37/10B01J37/28B01J37/30B01J2029/081B01J2229/16B01J2229/18C10G11/05
Inventor 王鹏周灵萍姜秋桥宋海涛孙言严加松田辉平张久顺
Owner CHINA PETROLEUM & CHEM CORP
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