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MFI (ZSM-5 zeolites)/MOR (Mordenite)/ANA (Analcime) type porous zeolite intergrowth material and preparation method thereof

A porous zeolite and zeolite technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high cost, single pore size of porous materials, etc., and achieve the effects of reducing emissions, good repeatability, and achieving wide distribution

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problem that the porous material synthesized by the prior art has a single pore size and high cost, and a new MFI / MOR / ANA type porous zeolite symbiotic material is provided

Method used

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  • MFI (ZSM-5 zeolites)/MOR (Mordenite)/ANA (Analcime) type porous zeolite intergrowth material and preparation method thereof
  • MFI (ZSM-5 zeolites)/MOR (Mordenite)/ANA (Analcime) type porous zeolite intergrowth material and preparation method thereof
  • MFI (ZSM-5 zeolites)/MOR (Mordenite)/ANA (Analcime) type porous zeolite intergrowth material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 2.13g of NaOH and 7.1g of tetrapropylammonium bromide in 60g of deionized water, stir at 30°C until clear, then slowly add 20g of silica sol (SiO 2 40wt%) and 0.89g aluminum sulfate (Al 2 (SO 4 ) 3 18H 2 O), after continuing to stir for 18 hours, put it into a crystallization kettle and cool it after hydrothermal treatment at 100 ° C for 24 hours, so that the molar composition is SiO 2 : 0.01Al 2 o 3 : 0.2TPABr : 0.4NaOH : 30H 2 The white seed solution of O, denoted as S1, its XRD diffraction pattern is figure 1 ; Add 4.67g NaOH and 3g seed crystal solution to 27g deionized water and stir evenly, then take 10g silica gel powder and 1.11g aluminum sulfate and add them to the mixed solution. 2 The weight is based on 30% seed crystals, and the rest of the molar composition is SiO 2 : 0.01Al 2 o 3 :0.7NaOH:10H 2 The precursor solution of O was put into a crystallization kettle and crystallized at 170°C for 48 hours, cooled, washed and dried, and then roa...

Embodiment 2～5

[0023] According to the method and content provided in Example 1, the amount of aluminum sulfate added in the process of preparing seed crystals and crystal transformation was changed to 3.56 and 4.44g, 1.78 and 2.22g, 0.44 and 0.55g, 0 and 0g respectively, and synthesized respectively changed the molar composition to SiO 2 : Al 2 o 3 =25, 50, 200, ∞ MFI / MOR / ANA type porous zeolite intergrowth materials. The XRD pattern is similar to Example 1.

Embodiment 6～9

[0025] According to the method and content provided in Example 1, using the S1 seed crystal, by adjusting the NaOH / SiO 2 MFI / MOR / ANA type porous zeolite intergrowth materials with different intergrowth phase ratios were synthesized, as shown in Table 1. The XRD pattern is similar to Example 1.

[0026] Table 1

[0027]

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Abstract

The invention relates to an MFI (ZSM-5 zeolites) / MOR (Mordenite) / ANA (Analcime) type porous zeolite intergrowth material and a preparation method thereof and mainly aims to solve the problems of single aperture and higher cost of a porous material synthesized by using the prior art. The problems are better solved by using the technical scheme as follows: the porous zeolite intergrowth material is prepared by using a method for realizing whole crystal transformation by utilizing seed crystal induction, wherein the intergrowth biophase is adjustable in proportion, and the synthesized porous intergrowth material comprises the following components in molar relation: nSiO2:Al2O3, wherein n ranges from 4 to infinity, and an XRD (X-Ray Diffraction) pattern 2 theta has characteristic diffraction peaks at the following positions: 6.51+ / -0.02, 7.95+ / -0.03, 8.84+ / -0.02, 13.45+ / -0.03, 15.81+ / -0.03, 18.28+ / -0.03, 23.18+ / -0.02, 23.32+ / -0.01, 25.96+ / -0.03, 30.54+ / -0.02, 33.27+ / -0.03 and 35.82+ / -0.02. The MFI / MOR / ANA type porous zeolite intergrowth material and the preparation method thereof can be used for industrial production of analysis and adsorption separation.

Description

technical field [0001] The invention relates to an MFI / MOR / ANA type porous zeolite intergrowth material and a preparation method thereof. Background technique [0002] The three-dimensional pore structure of MFI zeolite makes it have good shape-selective catalytic performance or adsorption and separation performance. It is the most widely used petrochemical material in industry. MOR zeolite has good The catalytic stability also makes it widely used in industrial catalysis. However, due to the uniform and single pore size distribution and low selectivity of the two zeolite materials, it is difficult to process complex components when used alone. The porous zeolite symbiotic material containing two or more components not only has a hierarchical pore structure and a wide distribution of acidity, but also can play its respective advantages in catalytic reactions, and synergistically catalyzes the processing of complex components with different molecular sizes. ANA type zeolite...

Claims

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Application Information

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IPC IPC(8): C01B39/04
Inventor 李旭光孔德金郑均林钱斌姜向东陈燕
Owner CHINA PETROLEUM & CHEM CORP
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