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Synthesis method of Y-MOR composite molecular sieve

A composite molecular sieve and molecular sieve technology, applied in the direction of mercerized crystalline aluminum silicate zeolite, octahedral crystalline aluminum silicate zeolite, crystalline aluminosilicate zeolite, etc., can solve problems such as environmental pollution, high proportion, and health hazards, and achieve The preparation process is green and environmentally friendly, the raw materials are cheap and easy to obtain, and the effect of reducing production costs

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the proportion of organic template agent in the preparation cost of zeolite molecular sieve is the highest, and the use of template agent also increases the operation steps of removing organic matter from composite molecular sieve, which not only increases the cost, but also pollutes the environment
And operators will cause great harm to their health when they come into contact with organic templates. For these reasons, many zeolite molecular sieve materials with excellent performance cannot be applied on a large scale in industry, so the development of economical and environmentally friendly zeolite molecular sieve synthesis technology is a new type. The basis for the wide application of catalytic materials

Method used

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  • Synthesis method of Y-MOR composite molecular sieve
  • Synthesis method of Y-MOR composite molecular sieve
  • Synthesis method of Y-MOR composite molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 40g of mordenite and 1000mL of 1mol / L NaOH solution in a beaker, stir at room temperature for 30min, transfer to a closed reaction kettle, and treat in an oven at 120°C for 4h. The resulting suspension is the structure-directing agent and is ready for use.

[0036] Take 30 g of Y-type molecular sieves and 14 g of sodium hydroxide, put them in 500 mL of distilled water, and stir in a 50°C water bath for 30 min; then add 40 mL of the structure-directing agent prepared in the previous step, and stir for 20 min; then add 10 g of alumina Sodium, stirred for 30 minutes; then slowly added 72 g of white carbon black, stirred for 30 minutes; then placed in a closed reactor, crystallized at 170 ° C for 28 hours. The obtained product was washed 4 times with distilled water to neutrality, and dried at 120°C for 12 hours. The obtained sample was Y-MOR composite molecular sieve, and the sample number was CL1.

Embodiment 2

[0038] Take 35g of mordenite and 1000mL of 1mol / L NaOH solution in a beaker, stir at room temperature for 30min, transfer to a closed reaction kettle, and treat in an oven at 125°C for 4h. The resulting suspension is the structure-directing agent and is ready for use.

[0039] Take 20 g of Y-type molecular sieves and 15 g of sodium hydroxide, place them in 550 mL of distilled water, and stir in a 45°C water bath for 30 min; then add 30 mL of the structure-directing agent prepared in the previous step, and stir for 20 min; then add 10 g of alumina Sodium, stirred for 30 minutes; then slowly added 80 g of white carbon black, stirred for 20 minutes; then put into a closed reaction kettle, crystallized at 175°C for 24 hours. The obtained product was washed 4 times with distilled water to neutrality, and dried at 120°C for 12 hours. The obtained sample was Y-MOR composite molecular sieve, and the sample number was CL2.

Embodiment 3

[0041] Take 30g of mordenite and 1000mL of 0.8mol / L NaOH solution in a beaker, stir at room temperature for 20min, transfer to a closed reaction kettle, and treat in an oven at 130°C for 3h. The resulting suspension is the structure-directing agent and is ready for use.

[0042] Take 25 g of Y-type molecular sieves and 16 g of sodium hydroxide, put them in 350 mL of distilled water, and stir in a 60°C water bath for 30 min; then add 20 mL of the structure-directing agent prepared in the previous step, and stir for 20 min; then add 15 g of aluminum sulfate , stirred for 30 minutes; then slowly added 100 mL of water glass, stirred for 20 minutes; then placed in a closed reactor, crystallized at 170 ° C for 30 hours. The obtained product was washed 4 times with distilled water until neutral, and dried at 120°C for 12 hours. The obtained sample was Y-MOR composite molecular sieve, and the sample number was CL3.

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Abstract

The invention discloses a preparation method of a Y-MOR composite molecular sieve, which comprises the following steps: properly treating mordenite with an alkaline solution to serve as a structural guide agent; and mixing Y-type molecular sieve, inorganic alkali and water, sequentially adding the structural guide agent, aluminum source and silicon source, and carrying out hydrothermal crystallization to obtain the Y-MOR composite molecular sieve. The synthetic raw materials used by the method are conventional inorganic materials without any toxic or harmful substance; the whole preparation process is green and environment-friendly; and the operation steps are simple and easy to implement.

Description

technical field [0001] The invention relates to a method for synthesizing Y-MOR composite molecular sieves, in particular to a green method for synthesizing Y-MOR composite molecular sieves, and belongs to the field of synthesis of molecular sieve catalytic materials. Background technique [0002] Y-type molecular sieve and mordenite (MOR) are widely used in petrochemical and other fields due to their good shape-selective catalytic performance and good thermal stability. However, because the pore size of these two molecular sieves is uniform and single, it is not conducive to the treatment of raw materials with complex components. Composite molecular sieve is a kind of molecular sieve material with a composite structure of various compositions. Its pores and acid properties are the organic combination of the pores and acid properties of its constituent molecular sieves. It has better multi-level pores and reasonable acid distribution than individual molecular sieves. When c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24C01B39/26
Inventor 范峰凌凤香王少军张会成陈晓刚杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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