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Method for preparing MCM-22, molecular sieve

A technology of MCM-22 and synthesis method, which is applied in the field of synthesis of MCM-22 molecular sieves, can solve problems that have not been reported, and achieve the effect that the method is simple and beneficial to industrial production and application

Inactive Publication Date: 2005-10-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] As can be seen from the above, the synthetic method of controlling the grain size of MCM-22 molecular sieve has not been reported so far

Method used

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  • Method for preparing MCM-22, molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of the first step reaction mixture

[0026] Molar ratio of Al in aluminum source 2 o 3 : SiO in silicon source 2 : Na in alkali source 2 O: organic templating agent: H 2 O is 0.033: 1: 0.045: 0.35: 15 to prepare the reaction mixture, then add the MCM-22 molecular sieve crystal seed crystal of 5% of the dry basis weight of the mixture to the reaction mixture, the aluminum source is sodium metaaluminate, and the silicon source is silica sol, The alkali source is sodium hydroxide, and the content of HMI in the organic template is 100%;

[0027] The second step of hydrothermal crystallization

[0028] The reaction mixture obtained in the first step was hydrothermally crystallized at 140° C. for 5 days, filtered, washed, dried, and calcined to obtain the product MCM-22 molecular sieve.

[0029] The product that obtains, MCM-22 molecular sieve, its XRD spectrogram is as figure 1 shown. The grain size of the molecular sieve was tested by a scanning electron...

Embodiment 2～5

[0031] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0032] Preparation of the first step reaction mixture

Embodiment 2

[0033] Example 2 The content of HMI in the organic template is 70%;

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Abstract

The present invention relates to a method for synthesizing MCM-22 molecular sieve whose grain size can be effectively controlled by using hexamethylene imine (HMI) and piperidine (PI) as mixed template agent. Said method includes the following steps: uniformly mixing aluminium source, silicon source, alkali source, template agent and water to obtain a colloidal material, then making it undergo the processes of hydrothermal crystalizing, filtering, washing, drying and roasting so as to obtain the invented product.

Description

technical field [0001] The present invention relates to a kind of synthetic method of MCM-22 molecular sieve, exactly, relate to a kind of MCM-22 that uses hexamethyleneimine (HMI) and piperidine (PI) as mixed template to synthesize grain size and can effectively control. A method for 22 molecular sieves belongs to the technical field of inorganic chemical synthesis. 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 cavity and supercage pore system structure (Science, 1994, 264: 1910). The catalytically active aluminum atoms are introduced into the framework of MWW molecular sieves to form MCM-22 molecular sieves (US4,954,325). Due to the special pore structure, as an acidic catalytic active component, MCM-22 molecular sieve exhibits excellent catalytic properties such as catalytic cracking (US 4,983,276), olefin and benzene alkylation (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04
Inventor 刘月明吴海虹吴鹏汪玲玲何鸣元
Owner EAST CHINA NORMAL UNIV
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