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Y molecular sieve and preparation method thereof

A technology of molecular sieves and elements, which is applied in the field of inorganic materials and catalyst preparation, can solve the problems of relative crystallinity and silicon-aluminum ratio reduction of synthetic products, and achieve the effects of reduced energy consumption, improved preparation efficiency, and short crystallization time

Inactive Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of microwave heating reaction mixed gel greatly shortens the crystallization time and reduces energy consumption, but the relative crystallinity and silicon-aluminum ratio of the synthesized product are significantly lower than those of the conventional hydrothermal synthesis method.

Method used

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  • Y molecular sieve and preparation method thereof
  • Y molecular sieve and preparation method thereof
  • Y molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present embodiment provides a kind of preparation method of Y molecular sieve, it comprises the following steps:

[0048] Get 75g water glass (SiO 2 The content is 28.45wt%, Na 2 O content is 8.89wt%), add 75g perbasic sodium metaaluminate (Na 2 O content is 21.11wt%, Al 2 o 3 Content is 3.16wt%), 34.09g tetrahydrofuran (analytical pure) and 30g water are mixed evenly, stirred at 33°C for 1h, aged for 16h, and made into a directing agent;

[0049] Get 200g water glass (SiO 2 The content is 28.45wt%, Na 2 O content is 8.89wt%), put into the beaker that is placed in 60 ℃ of water baths, under the condition of stirring, add 26.81g above-mentioned directing agent successively, 68.52g peralkali sodium metaaluminate (Na 2 O content is 21.11wt%, Al 2 o 3 Content is 3.16wt%) and 50g water, add 129.83g aluminum sulfate (Al 2 o 3 content is 7.60wt%) and stirred evenly to obtain a gel reaction mixture;

[0050] The above-mentioned gel reaction mixture was put into a...

Embodiment 2

[0053] The present embodiment provides a kind of preparation method of Y molecular sieve, it comprises the following steps:

[0054] Get 80g water glass (SiO 2 The content is 28.45wt%, Na 2 O content is 8.89wt%), add 40g perbasic sodium metaaluminate (Na 2 O content is 21.11wt%, Al 2 o 3 The content is 3.16wt%), 3.45g tetrahydrofuran (analytical pure) and 20g water are mixed evenly, stirred at 51°C for 1h, aged for 6h, and made into a directing agent;

[0055] During the preparation of the gel reaction mixture, the amount of raw materials and the order of addition remain unchanged, but after the directing agent and the high-alkali sodium metaaluminate solution are added to the water glass in sequence, stir for 8 hours, then add aluminum sulfate, and stir evenly Afterwards, the gel reaction mixture is obtained;

[0056] The above-mentioned gel reaction mixture was put into a reaction kettle, and then the reaction kettle was placed in a microwave heating device to stand sti...

Embodiment 3

[0059] The present embodiment provides a kind of preparation method of Y molecular sieve, it comprises the following steps:

[0060] Get 80g water glass (SiO 2 The content is 28.45wt%, Na 2 O content is 8.89wt%), add 40g perbasic sodium metaaluminate (Na 2 O content is 21.11wt%, Al 2 o 3 The content is 3.16wt%), 34.09g of ethanol (analytical grade) and 20g of water are mixed evenly, stirred at 21°C for 1h, aged for 6h, and made into a directing agent;

[0061] In the preparation process of the gel reaction mixture, the consumption of each raw material remains unchanged, but after the directing agent and the high alkali sodium metaaluminate solution are successively added to the water glass, stir for 48 hours, then add aluminum sulfate, and after stirring evenly, prepare Obtain gel reaction mixture;

[0062] Put the above gel reaction mixture into a reaction kettle, put the reaction kettle into a microwave heating device, crystallize at 80° C. for 60 min, then filter, wash...

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Abstract

The invention relates to a preparation method of a Y molecular sieve. The preparation method includes mixing a silicon source with an aluminum source, adding oxygen-containing organic matter and water into the mixture, and ageing the mixture at the temperature of 15-60 DEG C for 1-60 hours to obtain a guiding agent; adding the guiding agent, an alkaline solution and the water into the silicon source at the temperature of 10-90 DEG C, stirring for 1-80 hours, adding the aluminum source, and stirring evenly to obtain a gel reaction mixture; subjecting the gel reaction mixture to microwave heating, increasing the temperature to 80-120 DEG C, performing crystallization for 10-60 minutes, and performing filtering, washing and drying to obtain a Y molecular sieve product. By the preparation method, the Y molecular sieve with relative crystallinity of 80-85% and SiO2 / Al2O3 mole ratio of 4.8-5.2 can be synthesized in 10-60 minutes.

Description

technical field [0001] The invention relates to a method for rapidly preparing Y molecular sieves with high crystallinity and high silicon-aluminum ratio by an organic matter-assisted microwave method, and belongs to the technical field of inorganic materials and catalyst preparation. Background technique [0002] Y zeolite is widely used in the petroleum refining industry due to its developed three-dimensional channels, adjustable acidity, good thermal and hydrothermal stability. The annual consumption of NaY zeolite in my country is about 50,000 tons, and the annual consumption of NaY zeolite in the world is about 500,000-700,000 tons. It is the largest molecular sieve catalytic material. At present, the most commonly used preparation method of Y molecular sieve is similar to the directing agent method proposed by Grace Company of the United States in US3639099 and US3671191. Generally, the crystallization time of this method needs more than 20 hours, and the energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24C01P2002/72
Inventor 郭成玉李兆飞崔岩邢昕刘其武王骞阎立军庞新梅李发永
Owner PETROCHINA CO LTD
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