Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of BETA-MOR symbiotic molecular sieve

A technology of symbiotic molecular sieve and molecular sieve, applied in the direction of mercerized crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of unsuitable BETA-MOR symbiotic molecular sieve synthesis control, low sample crystallinity, etc., and achieve a green preparation process. Environmental protection, cheap and easy-to-obtain raw materials, and the effect of increasing the crystallization temperature

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 8 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of BETA-MOR symbiotic molecular sieve
  • Preparation method of BETA-MOR symbiotic molecular sieve
  • Preparation method of BETA-MOR symbiotic molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 40g of BETA molecular sieve 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.

[0037] Take 22 g of sodium hydroxide and 5 g of sodium aluminate in 500 mL of distilled water, and stir vigorously until they are completely dissolved. Add 70 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, stir vigorously for 30 min, then put it into a closed reaction kettle, crystallize in an oven at 120°C for 5h, and then crystallize at 150°C for 48h. 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 CL1.

Embodiment 2

[0039] Take 35g of BETA molecular sieves and 800mL 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 120°C for 3h. The resulting suspension is the structure-directing agent and is ready for use.

[0040] Take 31 g of sodium hydroxide and 19 g of aluminum sulfate in 300 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 30mL of the structure directing agent prepared in the previous step, stir vigorously for 40 min, then put it into a closed reaction kettle, crystallize in an oven at 125°C for 4h, and then crystallize at 140°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 CL2.

Embodiment 3

[0042] Take 40g of BETA molecular sieves and 1000mL of 1.2 mol / 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.

[0043] Take 20 g of sodium hydroxide and 4 g of sodium aluminate in 400 mL of distilled water, and stir vigorously until they are completely dissolved. Add 180 g of silica sol slowly and stir vigorously for 30 min. Then add 40mL of the structure-directing agent prepared in the previous step, stir vigorously for 30 minutes, then put it into a closed reaction kettle, crystallize in an oven at 130°C for 6h, and then crystallize at 170°C for 48h. . 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a BETA-MOR symbiotic molecular sieve, which comprises the following steps: adding a BETA molecular sieve into an alkaline solution, stirring and mixing, and treating under sealed conditions to obtain a suspension product to serve as a structural guide agent; mixing inorganic alkali, aluminum source, silicon source and water according to a certain mol ratio to synthesize an initial silicon-aluminum gel; after evenly mixing, adding the structural guide agent; and after evenly mixing, carrying out two-step crystallization to obtain the BETA-MOR symbiotic molecular sieve. Compared with the process of directly adding the BETA molecular sieve crystal seed, the method disclosed by the invention greatly enhances the degree of crystallization of the BETA molecular sieve in the BETA-MOR symbiotic molecular sieve, and effectively avoids generation of stray crystals. The method disclosed by the invention is simple to operate and easy to implement, and the raw materials are cheap, accessible, nontoxic and harmless.

Description

technical field [0001] The invention relates to a preparation method of BETA-MOR symbiotic molecular sieves, in particular to a method for green synthesis of BETA-MOR symbiotic molecular sieves, belonging 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. Intergrowth 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B39/26
Inventor 范峰凌凤香王少军张会成陈晓刚杨春雁
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com