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A kind of preparation method of mesopore-containing Y-type molecular sieve

A molecular sieve and mesoporous technology, applied in octahedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of small pore size and pore volume of Y-type molecular sieves

Active Publication Date: 2014-10-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of small pore size and pore volume of the Y-type molecular sieve prepared by the existing method, and provides a preparation method of the Y-type molecular sieve containing mesoporous

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  • A kind of preparation method of mesopore-containing Y-type molecular sieve
  • A kind of preparation method of mesopore-containing Y-type molecular sieve
  • A kind of preparation method of mesopore-containing Y-type molecular sieve

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specific Embodiment approach 1

[0032] Specific embodiment one: the preparation method of a kind of Y-type molecular sieve containing mesoporous in this embodiment, carries out according to the following steps:

[0033] 1. Preparation of sodium-type Y-type molecular sieve: Add aluminum source and NaOH to deionized water, heat at a temperature of 30°C to 50°C until completely dissolved to obtain a mixed solution, and then stir at a stirring speed of 400rpm to 600rpm Add the mixed solution into the silicon source, mix and stir evenly, age at room temperature for 1 to 2 days, then crystallize at 95°C for 1 to 4 days, filter to obtain a white solid, and finally Under the condition of 40°C-120°C, dry the obtained white solid for 5h-12h to obtain sodium Y-type molecular sieve; wherein the molar ratio of NaOH to aluminum source is (4-8):1, and the deionized The molar ratio of water to the aluminum source is (160-320): 1, the molar ratio of the silicon source to the aluminum source is (1.2-25): 1, and the silicon so...

specific Embodiment approach 2

[0042] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the quality and concentration of the sodium Y-type molecular sieve prepared in step 1 described in step 2 is an organic acid aqueous solution with a concentration of 0.01 mol / L to 0.5 mol / L The volume ratio is 1g: 15mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the quality of the Na-DA molecular sieve prepared in step two described in step three and the NaOH solution whose concentration is 0.1mol / L~2mol / L The volume ratio is 1 g: 30 mL. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a mesoporous-containing Y-shaped molecular sieve, and relates to a preparation method of a Y-shaped molecular sieve. The preparation method aims to solve the problems of small pore diameter and pore volume of the Y-shaped molecular sieve prepared through the traditional method. The preparation method comprises the following steps of: 1, preparing a sodium type Y-shaped molecular sieve; 2, preparing an ammonium type Y-shaped molecular sieve; 3, processing through an organic acid water solution; 4, processing through NaOH; and 5, processing through an ammonium nitrate water solution so as to obtain the mesoporous-containing Y-shaped molecular sieve. The mesoporous-containing Y-shaped molecular sieve is synthesized through a simple and effective method under a moderate condition, contains abundant mesoporous, is unchanged in microporosity, achieves the volume of the mesoporous at 0.5-1.5 mL / g, greatly promotes the macromolecule to approach a catalytic active center and is favorable for reaction mass transfer through more concentrated pore diameter distribution, has the advantages of adjustable ratio of silicon and aluminum contained in a framework and good hydrothermal stability and can be used as a catalyst carrier or directly used as a catalyst. The preparation method disclosed by the invention can be used for preparing the mesoporous-containing Y-shaped molecular sieve.

Description

technical field [0001] The invention relates to a preparation method of a Y-type molecular sieve. Background technique [0002] Y-type molecular sieves are an important class of zeolite molecular sieves. Due to their high specific surface area and strong acidity, they have been widely used in catalytic cracking, hydrocracking, alkylation, disproportionation and transalkylation, reforming, and adsorption and separation of gases. And other petroleum and petrochemical industry processes. However, since the pore size of the Y-type molecular sieve is only 0.74 nanometers, the mass transfer rate is greatly reduced in catalytic reactions involving macromolecules (such as aromatic compounds with functional groups), and it is difficult to reach the catalytic active center, resulting in low catalytic activity. limit its further application. Contents of the invention [0003] The invention aims to solve the problem of small aperture and pore volume of the Y-type molecular sieve pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24
Inventor 孙印勇王斌腾
Owner HARBIN INST OF TECH
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