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Synthesis method of BETA-MOR composite molecular sieve

A composite molecular sieve and synthesis method technology, which is applied in the field of molecular sieve catalytic material synthesis, can solve the problems of unsuitable BETA-MOR symbiotic molecular sieve synthesis control and low crystallinity of samples, and achieve simple and easy operation steps, cheap and easy-to-obtain raw materials, and reduce The effect of 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

Although this method also relates to the preparation method of symbiotic molecular sieves containing BETA and mordenite, this method is mainly designed for the preparation of pure BETA molecular sieves. The samples containing mordenite synthesized by this method have too low crystallinity and are not suitable for BETA- Synthesis Control of MOR Intergrowth Molecular Sieves

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Take 1000mL of 40g MOR and 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;

[0037] Take 13.9 g of sodium hydroxide and 10.4 g of sodium aluminate in 500 mL of distilled water, and stir vigorously until they are completely dissolved. Add 72 g of white carbon black slowly and stir vigorously for 30 min. Then add 20mL of the structure-directing agent prepared in the previous step, and stir vigorously for 30 minutes; then add 20g of BETA molecular sieve, and stir vigorously for 30 minutes; then put it into a closed reaction kettle, and crystallize in an oven at 170°C for 24h. The obtained product was washed 4 times with distilled water to neutrality, and dried at 120°C for 12 hours. The obtained sample was BETA-MOR composite molecular sieve, code CL1.

Embodiment 2

[0039] Take 800mL of 35g MOR and 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;

[0040] Take 12.0 g of sodium hydroxide and 7.4 g of sodium aluminate in 500 mL of distilled water, and stir vigorously until they are completely dissolved. Add 72 g of white carbon black slowly and stir vigorously for 20 min. Then add 35mL of the structure-directing agent prepared in the previous step, and stir vigorously for 30 minutes; then add 25g of BETA molecular sieve, and stir vigorously for 30 minutes; then put it into a closed reaction kettle, and crystallize in an oven at 170°C for 30h. The obtained product was washed 4 times with distilled water until neutral, and dried at 120°C for 12 hours. The obtained sample was BETA-MOR composite molecular sieve, code CL2.

Embodiment 3

[0042] Take 45g of MOR and 1000mL of 0.8 mol / L KOH solution in a beaker, stir at room temperature for 30min, transfer to a closed reaction kettle, and treat in an oven at 110°C for 3h. The resulting suspension is the structure-directing agent and is ready for use;

[0043] Take 15 g of sodium hydroxide and 15 g of aluminum sulfate in 350 mL of distilled water, and stir vigorously until they are completely dissolved. Slowly add 100 mL of water glass and stir vigorously for 30 min. Then add 40mL of the structure-directing agent prepared in the previous step, and stir vigorously for 40 minutes; then add 20g of BETA molecular sieve, and stir vigorously for 30 minutes; then put it into a closed reaction kettle, and crystallize in an oven at 165°C for 35h. The obtained product was washed 4 times with distilled water to neutrality, and dried at 120°C for 12 hours, and the obtained sample number was CL3.

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Abstract

The invention discloses a synthesis method of a BETA-MOR composite molecular sieve, which comprises the following steps: treating mordenite with an alkaline solution to serve as a structural guide agent; mixing inorganic alkali, silicon source, aluminum source and water to obtain a silicon-aluminum gel; and adding the structural guide agent, adding a BETA molecular sieve, and carrying out hydrothermal crystallization to obtain the BETA-MOR composite molecular sieve. The synthetic raw materials used by the method are conventional inorganic materials without any expensive template agent; 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 BETA-MOR composite molecular sieves, in particular to a green method for synthesizing BETA-MOR composite molecular sieves, which belongs to the field of synthesis of molecular sieve catalytic materials. Background technique [0002] BETA 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02
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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