Method for preparing rare-earth ultrastable Y-type zeolite

A zeolite and rare earth technology, which is applied in the field of preparation of rare earth ultra-stable Y-type zeolite, can solve the problem of not being able to effectively reduce the olefin content of catalytic gasoline, and achieve the effects of good heavy oil cracking ability, simplified preparation process, and good coke selectivity

Active Publication Date: 2005-10-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method involves using an acid to further treat an ultrastable Y-type zeolite that has undergone high-temperature hydrothermal dealumination to carry out deep framework dealumination, and the unit cell constant of the obtained target product is lower than 2.419nm. Obviously, as a cracking catalyst active components, cannot effectively reduce the olefin content of catalytic gasoline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 60 kg of decationized water, 3 kg of NH 4 Cl and 3 kilograms (dry basis) NaY zeolite (Qilu Petrochemical Company Catalyst Factory produces, NaY 2 O 14% by weight, unit cell constant 2.465nm), carry out ion exchange at 90°C for 45 minutes, filter and wash with water, and bake the filter cake at 600°C under 100% water vapor for 2 hours to prepare a baked NaHY zeolite M. Its composition is Na 2 O5.5 wt%, Al 2 o 3 23.4% by weight, SiO 2 %69.7% by weight, unit cell constant 2.455nm, relative crystallinity 78.2%.

[0038] Get 100 grams (dry basis) NaHY zeolite M and 1200 milliliters of decationized water to make a slurry, be warming up to 90 ℃, then add the mixed solution of 100 milliliters of chlorinated mixed rare earths and citric acid (containing 4 Gram C 6 h 8 o 7 ·H 2 O and 5.36 g RE 2 o 3 , Chlorinated mixed rare earths are produced by Inner Mongolia Baotou Rare Earth Plant, composed of La 2 o 3 53.2%, CeO 2 13.0%, Pr 6 o 11 13.0%, Nd 2 o 3 20.8%)...

Embodiment 2

[0041] Preparation method is the same as example 1, and difference is that 100 milliliters of chlorinated mixed rare earths and the mixed solution of citric acid contain 8 grams of C 6 h 8 o 7 ·H 2 O, the rare earth ultra-stable Y-type zeolite was prepared, coded as B.

[0042] The chemical composition of B is shown in Table 1, and the main physical and chemical properties are shown in Table 2.

Embodiment 3

[0044] Preparation method is the same as example 1, and difference is that 100 milliliters of chlorinated mixed rare earths and the mixed solution of citric acid contain 12 grams of C 6 h 8 o 7 ·H 2 O, the rare earth ultrastable Y zeolite was prepared, coded as C.

[0045] The chemical composition of C is shown in Table 1, and the main physical and chemical properties are shown in Table 2.

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Abstract

The present invention relates to a preparation method of rare earth overstable Y zeolite. It is characterized by that said method includes the following steps: using mixed solution formed from rare earth salt and citric acid or mixed solution formed from inorganic ammonium salt, rare earth salt and citric acid to treat zeolite. Said zeolite can be used as active component of cracking catalyst, and has the advantages of reducing olefin content of catalytic cracked gasoline and obviously raising catalytic cracked light oil yield.

Description

technical field [0001] The present invention relates to a preparation method of Y-type zeolite, more specifically, relates to a preparation method of rare earth ultra-stable Y-type zeolite. Background technique [0002] As environmental protection has increasingly stringent quality requirements for gasoline products, gasoline has developed from unleaded gasoline to new formula gasoline. In the standards of newly formulated gasoline, on the one hand, it is required to limit the vapor pressure and benzene content of gasoline, and on the other hand, it will gradually limit the content of olefin components. For example, the Class II gasoline standard in the World Fuel Oil Specification requires that the olefin content in gasoline components be less than 20% by volume. Since July 1, 2002, China's gasoline standards in the three major cities of Beijing, Shanghai, and Guangzhou require that the olefin content in gasoline components be less than 35% by volume. China's future gasol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C01B39/08C01B39/24C10G11/05C10G45/12
Inventor 蒋文斌龙军田辉平宋海涛陈蓓艳何鸣元王振波范玉华
Owner CHINA PETROLEUM & CHEM CORP
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