Process for preparing super-stable Y zeolite containing rare-earth elements

A zeolite and rare earth technology, applied in the field of Y-type zeolite preparation, can solve the problems of poor hydrothermal stability, activity stability, anti-sodium and anti-heavy metal pollution, long time, high temperature, etc., and achieve pore volume retention Effect of slow, high hydrothermal stability

Inactive Publication Date: 2004-07-28
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

However, using the method of precipitating rare earths on zeolites and drying RECl 3 Mix with ultra stable Y zeolite and then use SiCl 4 None of the treatment methods can achieve the purpose of replacing these sodium ions with rare earth ions
And adopt the method of ion exchange, although partial replacement can take place, the time of the first ion exchange is longer, and the temperature is also higher, the second, even under the condition of higher temperature and longer exchange time, the sodium oxide It is also difficult to reduce the content to a satisfactory level
Just because of this, adopt existing technology, when preparing rare earth ultra stable Y zeolite with the ultra stable Y zeolite containing about 4% by weight of sodium oxide, the sodium content of the rare earth ultra stable Y zeolite that obtains is higher, hydrothermal stability, activity Poor stability, resistance to sodium and heavy metal pollution

Method used

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  • Process for preparing super-stable Y zeolite containing rare-earth elements
  • Process for preparing super-stable Y zeolite containing rare-earth elements
  • Process for preparing super-stable Y zeolite containing rare-earth elements

Examples

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preparation example Construction

[0030] According to the preparation method of the catalyst provided by the present invention, the slurry obtained after grinding is filtered, washed with deionized water until there is no acid ion, and dried to obtain the rare earth-containing ultrastable Y zeolite. When preparing the catalyst, the slurry obtained after grinding can be directly used, and the rare earth-containing ultrastable Y zeolite obtained after filtering, washing and drying can also be used. For example, when preparing a catalytic cracking catalyst, the slurry obtained after grinding or the rare earth-containing ultrastable Y zeolite obtained by filtering, washing and drying can be beaten and dried together with the materials constituting the catalytic cracking catalyst carrier or their precursors and water. , washing and drying again to obtain a catalytic cracking catalyst.

[0031] The rare earth-containing ultrastable Y zeolite prepared by the method provided by the invention can be used as various cat...

example 1

[0051] The rare earth-containing ultrastable Y zeolite is prepared according to the method provided by the invention.

[0052] Take by weighing 500 grams of ultra-stable Y zeolite (unit cell constant is 2.468 nanometers, produced by Zhoucun Catalyst Factory of Qilu Petrochemical Company) with 4.3 weight % of sodium oxide content and RECl 3 (produced by Baotou Chemical Plant, in which, in terms of oxides, La 2 o 3 , CeO 2 The weight ratio with other rare earth metal oxides is 1:2:0.2. ) solution mixing, zeolite, RECl 3 The weight ratio with water is 1:0.135:1.5. The slurry obtained is placed in the JTM-50 vertical colloid mill (produced by Shenyang Xinguang Power Machinery Co., Ltd., Ministry of Aerospace Industry), and ground for 5 minutes at a temperature of 20 ° C. The shear stress of grinding is 20 kg / cm 2 . Filtrate, wash the solid product with deionized water until there is no chloride ion, and dry at 120° C. to obtain the rare earth-containing ultrastable Y zeolite...

example 2

[0055] The rare earth-containing ultrastable Y zeolite is prepared according to the method provided by the invention.

[0056] Taking by weighing sodium oxide content is 4.3 % by weight ultra-stable Y zeolite (with example 1) 500 grams and RECl 3 (With example 1) the solution mixes homogeneously, and zeolite, RECl 3 The weight ratio with water is 1:0.2:2.0. The slurry obtained was placed in a JTM-50 vertical colloid mill (same as example 1), and ground at a temperature of 12°C for 5 minutes, and the grinding shear stress was 40 kg. Add 1:1 ammonia water, adjust the pH value of the slurry to 6.0, continue grinding for 5 minutes, filter, wash the solid product with deionized water until it is free of chloride ions, and dry it at 120°C to obtain the rare earth-containing supernatant prepared by the method provided by the invention. Stable Y zeolite C. Its chemical composition and physicochemical properties are listed in Table 1.

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Abstract

A rare-earth contained super-stable Y zeolite is prepared from the super-stable Y zeolite containing sodium oxide (3-5 wt.%), rare-earth compound and water in wt ratio of 1:(0.001-0.5):(1-10) through preparing solution of rare-earth compound, mixing and the said Y zeolite, and grinding with shearing stress of at least 10 kg/cm2 for at least 1 min. Its advantages are higher hydrothermal stability, high stability of activity, and high resistance to sodium and heavy metal pollutions.

Description

technical field [0001] The invention relates to a preparation method of Y-type zeolite, more specifically, a preparation method of a rare earth-containing ultrastable Y zeolite. Background technique [0002] In order to improve the activity and structural stability of the ultra-stable Y zeolite, rare earth components are often introduced into the ultra-stable Y zeolite. One of the common methods for introducing rare earth components is to precipitate the rare earth ions in the solution on the Y-type zeolite with an alkaline solution. On the catalyst, the second common method is the method of ion exchange. [0003] CN1034680A discloses a rare earth-containing silicon-rich molecular sieve cracking catalyst, which uses 5-40% by weight of rare-earth-containing silicon-rich HY zeolite as an active component, supplemented by 95-60% by weight of Al 2 o 3 , SiO 2 , SiO 2 -Al 2 o 3 It is composed of a fully synthetic carrier, or a semi-synthetic carrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08B01J37/04C10G11/05
Inventor 陈玉玲马跃龙孙伟达志坚何鸣元舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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