Synthetic method of MCM-22 (Multiple Chip Module 22) molecular sieve

A synthesis method and technology of molecular sieves, which are applied in the field of synthesis of MCM-22 molecular sieves, can solve problems affecting the performance of molecular sieves, and achieve the effects of high product yield, low crystallization temperature, and short crystallization time

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the above synthesis method of MCM-22 molecular sieve, the reaction mixture is directly crystallized at high temperature, and ZSM-5, ZSM-12 or ZSM-35 miscellaneous crystals are prone to appear, which affects the performance of the molecular sieve

Method used

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  • Synthetic method of MCM-22 (Multiple Chip Module 22) molecular sieve
  • Synthetic method of MCM-22 (Multiple Chip Module 22) molecular sieve
  • Synthetic method of MCM-22 (Multiple Chip Module 22) molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of Structure Directing Agents

[0051] 5.8g NaAlO 2 Dissolve in 654g of water, add 28g of HMI (99%), stir evenly, then add 48g of silica sol, adjust the pH value of the mixture to about 10 with sodium hydroxide solution to form a reaction mixture, place the mixture in a stainless steel reactor, and pass the temperature After treatment at 110°C for 12 hours, the resulting mixture is the structure directing agent CL-1.

[0052] Preparation of MCM-22 molecular sieve

[0053] 0.71g NaAlO 2 Mix evenly with 3.18g of sodium hydroxide solution in a 100ml stainless steel reaction kettle, add 5.5g of silica gel, 69.7g of deionized water and 3.16g of HMI into the kettle in sequence while stirring, and finally add 20g of structure-directing agent CL-1. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 110° C. for 60 h. After cooling, centrifuge the solid from the mother liquor, wash the solid with deionized water to pH 8-9, ...

Embodiment 2

[0055] Preparation of Structure Directing Agents

[0056] 1.13g NaAlO 2 Dissolve in 145.44g of water, add 3.004g of HMI (99%) and 5.202g of triethanolamine and stir evenly, then add 5.4g of silica sol, adjust the pH value of the mixture to about 12 with sodium hydroxide solution to form a reaction mixture, place the mixture in In a stainless steel reactor, after treatment at a temperature of 130°C for 15 hours, the resulting mixture is the structure directing agent CL-2.

[0057] Preparation of MCM-22 molecular sieve

[0058] 0.284g NaAlO 2 Mix well with 6.01g of sodium hydroxide solution in a 100ml stainless steel reaction kettle, add 5.5g of silica gel, 59.3g of deionized water, 3.00g of HMI and 1.50g of CHA into the kettle in turn under stirring, and finally add 12g of structure-directing agent CL- 2. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 120° C. for 15 hours. After cooling, centrifuge the solid from the mother liqu...

Embodiment 3

[0060] Preparation of Structure Directing Agents

[0061] 5.63g NaAlO 2 Dissolve in 727g of water, add 18g of HMI (99%) and 13.5g of cyclohexane and stir evenly, then add 54g of silica sol, adjust the pH value of the mixture to about 10 with sodium hydroxide solution to form a reaction mixture, and place the mixture in stainless steel for reaction In the kettle, after being treated at a temperature of 150°C for 13 hours, the obtained mixture is the structure directing agent CL-3.

[0062] Preparation of MCM-22 molecular sieve

[0063] 0.284g NaAlO 2 Mix well with 6.01g of sodium hydroxide solution in a 100ml stainless steel reaction kettle, add 5.5g of silica gel, 59.3g of deionized water, 3.00g of HMI and 1.50g of CHA into the kettle in turn under stirring, and finally add 8g of structure directing agent CL- 3. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 130° C. for 20 h. After cooling, centrifuge the solid from the mother ...

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Abstract

The invention relates to a preparation method of an MCM-22 (Multiple Chip Module 22) molecular sieve, which comprises the following steps of: firstly preparing a structure directing agent, and uniformly mixing the structure directing agent with a silicon source, an aluminum source, a boron source or an iron source, an organic template agent and water into glue, wherein the organic template agent can be dimethyleneimine and can also be a mixed template agent comprising the dimethyleneimine and one or more of hydrocarbons, organic amine, alcohols and ketones; and then synthesizing an MCM-22 molecular sieve material through the silicon source, the aluminum source, alkali, the organic template agent and the structure directing agent, carrying out hydrothermal crystallization and obtaining an MCM-22 molecular sieve product through conventional processes of filtering, washing, drying and roasting. The method disclosed by the invention has the main characteristic that the structure directing agent is added into gel, and compared with the prior art, the method disclosed by the invention has the advantages of low crystallization temperature, short crystallization time, high product yield, high product quality and the like. The MCM-22 molecular sieve product disclosed by the invention has excellent catalytic performances, such as catalytic cracking, olefin and benzene alkylation and the like.

Description

technical field [0001] The invention relates to a method for synthesizing a molecular sieve with a MWW structure, in particular to a method for synthesizing an MCM-22 molecular sieve. Background technique [0002] Molecular sieves with MWW structure are a class of molecular sieves with sinusoidal 10-membered ring network pore system, 12-membered ring hole and supercage pore system structure. The catalytically active aluminum atoms were introduced into the framework of MWW molecular sieves to form MCM-22 molecular sieves. Due to the special pore structure, as an acidic catalytic active component, MCM-22 molecular sieve exhibits excellent catalytic performance in catalytic cracking, olefin and benzene alkylation. Molecular sieves with MWW structure, as acidic catalytic active components, have been industrialized in the process of alkylation of olefins and benzene. [0003] In recent years, the research on MCM-22 molecular sieve is very active. It was first developed by Mobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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