Y molecular sieve high in silica alumina ratio and abundant in secondary holes and preparation method therefor

A secondary pore, silicon-aluminum ratio technology, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems of limiting the range of molecular sieve raw materials, increasing hydrothermal dealumination to create mesopores, etc., to achieve The effect of widening the selection range of raw materials, low reagent cost, and enriching the secondary pore structure

Inactive Publication Date: 2015-08-19
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

[0011] However, there is an obvious limitation in the alkali treatment technology, that is, the requirement for the raw material must be a molecular sieve with a high silicon-aluminum ratio. Mesoporous, at the same time, it is considered that the ratio of silicon to aluminum is 25-50:1, which is the best range of silicon to aluminum for alkali treatment
However, the conventional Y-type molecular sieve obtained by synthesis has a silicon-aluminum ratio of only about 3.0-6.0:1, which is not in this optimal range.
[0012] And CN101722022A discloses the method that Y-type molecular sieve is carried out alk

Method used

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  • Y molecular sieve high in silica alumina ratio and abundant in secondary holes and preparation method therefor
  • Y molecular sieve high in silica alumina ratio and abundant in secondary holes and preparation method therefor

Examples

Experimental program
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Example Embodiment

[0044] Example 1

[0045] This embodiment provides a Y molecular sieve with high silicon-to-aluminum ratio and rich secondary pores, which is prepared by the following steps:

[0046] Weigh 20.0g of NaY zeolite sample dried overnight and place it in a quartz reaction tube, pour nitrogen into it, and do the leak detection work. After preparation, set the nitrogen purge rate to 50mL / min (glass rotor flowmeter) and set the reaction Furnace heating program: After 100 minutes of heating from the starting temperature of 30°C to 500°C, the temperature is kept for 120 minutes, then the heating is stopped. When the temperature naturally drops to 270°C, the SiCl is passed through 4 Saturated N 2 At the same time, the temperature is increased to 430°C at a heating rate of 4°C / min for 40min. After the reaction is completed, stop feeding the SiCl 4 Saturated N 2 , N 2 Continue to purge for 120 minutes, then stop heating and cool down naturally, take out the sample and wash and dry to obtain a cr...

Example Embodiment

[0052] Example 2

[0053] This embodiment provides a Y molecular sieve with high silicon-to-aluminum ratio and rich secondary pores, which is prepared by the following steps:

[0054] Weigh 20.0g of NaY zeolite sample dried overnight and place it in a quartz reaction tube, pour nitrogen into it, and do the leak detection work. After preparation, set the nitrogen purge rate to 50mL / min (glass rotor flowmeter) and set the reaction Furnace heating program: After 100 minutes of heating from the starting temperature of 30°C to 500°C, the temperature is kept for 120 minutes, then the heating is stopped. When the temperature naturally drops to 270°C, the SiCl is passed through 4 Saturated N 2 At the same time, the temperature is increased to 510°C at a heating rate of 4°C / min for 1h. After the reaction is completed, stop feeding the SiCl 4 Saturated N 2 , Alone N 2 Continue to purge for 120 minutes, then stop heating and cool down naturally, take out the sample and wash and dry to obtain a...

Example Embodiment

[0060] Example 3

[0061] This embodiment provides a Y molecular sieve with high silicon-to-aluminum ratio and rich secondary pores, which is prepared by the following steps:

[0062] Weigh 20.0g of NaY zeolite sample dried overnight and place it in a quartz reaction tube, pour nitrogen into it, and do the leak detection work. After preparation, set the nitrogen purge rate to 50mL / min (glass rotor flowmeter) and set the reaction Furnace heating program: After 100 minutes of heating from the starting temperature of 30°C to 500°C, the temperature is kept for 120 minutes, then the heating is stopped. When the temperature naturally drops to 270°C, the SiCl is passed through 4 Saturated N 2 At the same time, the temperature is increased to 510°C for 80min at a heating rate of 3°C / min. After the reaction is completed, stop feeding the SiCl 4 Saturated N 2 , N 2 Continue to purge for 120 minutes, then stop heating and cool down naturally, take out the sample and wash and dry to obtain a cr...

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Abstract

The invention provides a Y molecular sieve high in silica alumina ratio and abundant in secondary holes and a preparation method therefor. The preparation method comprises steps of: Y-type zeolite is processed for 1-5 hours at 300-600 DEG C to obtain dry Y-type zeolite, and calculated by SiO2 and Al2O3, the silica alumina mole ratio of the Y-type zeolite is (3-6):1;the temperature is lowered to 200-600 DEG C;in a waterless dry environment, dry air saturated by a dealuminated siliceous reinforcing agent is introduced to the dry Y-type zeolite to react for 0.5h-7h, or in a waterless dry environment, the temperature is raised to 500-700 DEG C at a constant speed, at the same time, the dry air saturated by a dealuminated siliceous reinforcing agent is introduced to the dry Y-type zeolite to react for 0.5h-7h, and a rough product is obtained; the rough product is subjected to alkali treatment for 10min-5h at 30-100 DEG C, solid-liquid mass ratio for the alkali treatment is (1-50):1, and a Y molecule sieve high in silica alumina ratio and abundant in secondary holes is obtained. The invention further provides the Y molecule sieve high in the silica alumina ratio and abundant in secondary holes, obtained by adopting the preparation method and has high silica aluminum ratio and abundant secondary hole structures.

Description

technical field [0001] The invention relates to a Y molecular sieve with a high silicon-aluminum ratio and abundant secondary pores and a preparation method thereof, belonging to the technical field of molecular sieve preparation. Background technique [0002] Since the first industrial fluidized catalytic cracking unit was put into operation in 1942, it has developed into a core processing technology in the oil refining industry. Moreover, due to the characteristics of my country's own crude oil, the status of catalytic cracking technology is even more important. The importance of Y-type molecular sieve as the main active component of cracking catalyst is self-evident. [0003] Since Break's successful synthesis of Y-type molecular sieves, the world's energy structure and chemical composition have changed, triggering a revolution in petrochemicals. Today, after decades of changes, although synthetic materials emerge in endlessly, no one can shake the monopoly position of Y...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 申宝剑袁德林高雄厚王宝杰赵红娟王闻年孙建学李浩康春燕郭巧霞任申勇郭成玉李程申波俊
Owner BC P INC CHINA NAT PETROLEUM CORP
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