Rare-earth Y-type zeolite

A zeolite and rare earth technology, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems that the unit cell cannot be further shrunk, rare earth is difficult to exchange, and the content of rare earth is low

Inactive Publication Date: 2004-08-18
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0007] In summary, although REY and REHY zeolites have high rare earth content, RE in REY 2 o 3 The content of 10-20% by weight, REHY in RE 2 o 3 The content is 6-14% by weight, which has high activity and hydrogen transfer activity, but the unit cell cannot shrink further, and the unit cell constant a 0 =2.468-2.470nm, the hydrothermal stability is poor, and its differential thermal collapse temperature is 900-980°C; on the contrary, USY zeolite has better unit cell shrinkage, a 0 = 2.445-2.450nm, good hydrothermal stability, differential thermal collapse temperature above 1000°C, but it is difficult to exchange rare earths in the crystal, and the content of rare earths is small
Moreover, the unit cells of the above two types of zeolites shrink greatly after aging due to different reasons, and the unit cell constant in the equilibrium state is only 2.425-2.428nm, so the hydrogen transfer activity loses quickly, and it is difficult to meet the requirements of new cracking catalysts for selective hydrogen transfer.
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Method used

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  • Rare-earth Y-type zeolite
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Examples

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Effect test

example 1

[0024] The NaY zeolite with a solid content of 85% (Zhoucun Catalyst Factory of Qilu Petrochemical Company, the ratio of silicon to aluminum is 4.0, the unit cell constant is 2.473nm, the alumina is 24.8%, and the sodium oxide is 16%), at 80-90°C Next, press NaY:RECl 3 :H 2 The ratio of O=1:0.21:10, the rare earth exchange was carried out for 60 minutes, so that RE 2 o 3 The content is 16%, of which La 2 o 3 4.16%, Ce 2 o 3 The content of other rare earth oxides is 3.68%. According to NaY:SiCl 4 = 1:0.5 ratio, carry SiCl with dry air 4 React at 450°C for 120 minutes, blow with dry air for 20 minutes, wash and filter to remove Cl in zeolite - and Na + , to obtain a sample, numbered RGY-1.

example 2

[0026]The NaY zeolite with a solid content of 75% (Zhoucun Catalyst Factory of Qilu Petrochemical Company, the ratio of silicon to aluminum is 5.05, the unit cell constant is 2.466nm, the alumina is 21.2%, and the sodium oxide is 15.8%), at 80-95°C Next, press NaY:RECl 3 :H 2 O=1:0.25:10 ratio, carry out rare earth exchange for 40 minutes, filter and wash. According to NaY:SiCl 4 = 1:0.5 ratio, carry SiCl with dry air 4 Reacted at 550°C for 60 minutes, purged with dry air for 120 minutes, washed and filtered to obtain a sample, numbered RGY-2.

example 3

[0028] Take REHY (Zhoucun Catalyst Factory of Qilu Petrochemical Company, RE 2 o 3 Content 13.4%, of which La 2 o 3 12.7% by weight, Ce 2 o 3 is 2.7% by weight, the content of other rare earth oxides is 1.9% by weight, the unit cell constant of zeolite is 2.469nm, the differential thermal differential thermal collapse temperature is 985 ° C, Na 2 O content is 4.4% by weight) into the reactor, dried to water content less than 5%, according to REY: SiCl 4 = 1:0.5 ratio, carry SiCl with dry air 4 Reacted at 350°C for 3 hours, purged with dry air for 60 minutes, washed and filtered to obtain a sample, numbered RGY-3.

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Abstract

A rare-earth Y-zeolite used for preparing the cracking catalyst of petroleum hydrocarbon has 4-15 wt.% of rare-earth content, 2.45-2.458 nm of crystal cell contstant, 1000-1056 deg.C of differential thermal collapse temp, and 8.3-8.8 of Si/Al ratio. Its advantages are high activity and selectivity to heavy oil and coke, good hydrogen transfer activity, and high output rate of light oil.

Description

technical field [0001] The invention relates to a rare earth Y-type zeolite. Background technique [0002] FCC gasoline is the main component of motor gasoline. At present, FCC gasoline accounts for about 70% of motor gasoline in my country. In recent years, with the further improvement of environmental protection requirements, people's demand for catalytic cracking high-quality clean gasoline with low olefin and low sulfur content is also more urgent. However, the increasingly heavy catalytic cracking raw oil puts forward higher requirements for the catalytic cracking catalyst, that is, it is required not only to have higher activity, better selectivity and hydrogen transfer activity, but also to have higher hydrothermal stability. sex. [0003] Y-type zeolite, as the main active component of catalytic cracking catalyst, has gone through the following stages of development: [0004] NaY zeolite is inactive to acid or catalytic reaction, it is 4 + Exchange Na + After b...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 杜军李峥达志坚
Owner CHINA PETROLEUM & CHEM CORP
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