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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, achieve good heavy oil cracking ability, good coke selectivity, and simplify the preparation process.

Active Publication Date: 2007-03-28
CHINA PETROLEUM & CHEM CORP
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  • 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 deionized water and 3 kg of NH to the stirred tank 4 Cl and 3 kg (dry basis) NaY zeolite (produced by Qilu Petrochemical Company Catalyst Plant, Na 2 O14 wt%, unit cell constant 2.465nm), ion exchange at 90°C for 45 minutes, filtration and water washing, the filter cake is calcined at 600°C and 100% steam for 2 hours to prepare a baked NaHY zeolite M. Its composition is Na 2 O5.5wt%, Al 2 O 3 23.4% by weight, SiO 2 % 69.7% by weight, the unit cell constant is 2.455nm, and the relative crystallinity is 78.2%.

[0038] Take 100 g (dry basis) of NaHY zeolite M and 1200 ml of decationized water to make a slurry, heat to 90°C, and then add 100 ml of mixed rare earth chloride and citric acid mixed solution (containing 4) to the slurry at a rate of 5 ml / min. Gram C 6 H 8 O 7 ·H 2 O and 5.36 g RE 2 O 3 , Chlorinated mixed rare earth is produced by Baotou Rare Earth Plant in Inner Mongolia, and the composition is 2 O 3 53.2%, CeO 2 13.0%, Pr 6 O 11 13.0%, Nd 2 O 3 20.8%...

Embodiment 2

[0041] The preparation method is the same as in Example 1, except that 100 ml of mixed rare earth chloride and citric acid mixed solution contains 8 g of C 6 H 8 O 7 ·H 2 O, prepared rare earth super stable Y-type zeolite, numbered 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] The preparation method is the same as Example 1, except that 100 ml of mixed rare earth chloride and citric acid mixed solution contains 12 g of C 6 H 8 O 7 ·H 2 O, prepared rare earth super stable Y zeolite, numbered 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 method for preparing Y-type zeolite, and more specifically, to a method for preparing rare earth ultra-stable Y-type zeolite. Background technique [0002] As environmental protection has increasingly strict requirements on the quality of gasoline products, gasoline has developed from unleaded gasoline to newly formulated gasoline. In the standard for newly formulated gasoline, on the one hand, the vapor pressure and benzene content of gasoline are required to be restricted; on the other hand, the content of olefins will be gradually restricted. For example, the Class II gasoline standard in the World Fuel Regulation requires that the content of olefins in gasoline components be less than 20% by volume. The gasoline standards that China has implemented in the three major cities of Beijing, Shanghai and Guangzhou since July 1, 2002 require that the olefin content in gasoline components is less than 35% by volume. China's fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/08B01J29/08C10G11/05C10G45/12C01B39/24
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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