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ZSM-5/Magadiite/mordenite coexisting material and method for synthesizing same

A technology of mordenite and synthesis method, applied in mordenite crystalline aluminosilicate zeolite, chemical instruments and methods, crystalline aluminosilicate zeolite, etc. Effects of catalytic performance, increased specific surface area, and adjustable pore size

Active Publication Date: 2009-08-26
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 that the porous material synthesized in the prior art has a single pore diameter and the pore diameter cannot be adjusted arbitrarily.

Method used

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  • ZSM-5/Magadiite/mordenite coexisting material and method for synthesizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Get 569 grams of sodium metasilicate and dissolve in 900 grams of deionized water. In addition, 66.8 grams of aluminum sulfate was dissolved in 150 grams of deionized water, and added into the sodium silicate solution under stirring. After the solution was mixed evenly, 59 g of ethylenediamine was added under stirring, and after stirring evenly, the pH value was adjusted to 11 with 30% sulfuric acid solution, and then the stirring was continued until uniform, and conventional hydrothermal crystallization was carried out at 150° C. for 10 hours. After washing, the product was dried at 130°C for 4 hours and calcined at 550°C for 3 hours to obtain the mordenite seed crystal required by the present invention, which was designated as M1.

Embodiment 2

[0025] According to the method and content provided in Example 1, the amount of aluminum sulfate added was changed to 33.4 grams to obtain the mordenite seed crystal required by the present invention, which was denoted as M2.

Embodiment 3

[0027] Get 33.3 grams of sodium metasilicate, dissolve into solution A with 100 grams of distilled water, get 57.4 grams of 40% silica sol, make solution mercerizing with 100 grams of distilled water, get 0.48 grams of aluminum sulfate, make solution C with 20 milliliters of distilled water, Slowly pour solutions A and C into the mercerizing solution, stir vigorously, add 2.6 grams of sodium hydroxide, and then add 1.2 grams of mordenite seed crystal M1, after stirring for a period of time, adjust the pH value to 11 with dilute sulfuric acid to control the sol The molar ratio is: Si: Al: Na: H 2 O=1:0.005:0.6:40, put the mixed solution into an autoclave, keep it at 180°C for 40 hours, then take it out and wash it twice, dry it at 120°C for 4 hours, and bake it at 550°C for 3 hours to obtain ZSM-5 / Magadiite / Mordenite intergrowth material, the XRD diffraction pattern is as follows figure 1 As shown, there are d-spacing maxima at 15.73, 13.52, 11.22, 9.96, 8.96, 7.73, 6.71, 5....

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Abstract

The invention relates to a ZSM-5 / Magadiite / mordenite coexisting material and a method for synthesizing the same, and mainly solves the problems that a porous material synthesized by the prior art is single and nonadjustable in pore-size distribution. The method prepares the ZSM-5 / Magadiite / mordenite coexisting material. A mole relation of the components of the synthesized ZSM-5 / Magadiite / mordenite coexisting material is nSiO2 :Al2O3, wherein n is between 10 and 2,000; the ZSM-5 / Magadiite / mordenite coexisting material has three coexisting phases; the XRD diffraction pattern of the ZSM-5 / Magadiite / mordenite coexisting material comprises a technical proposal that a maximum value of a distance d is at positions between 15.73-0.1 and 15.73+0.1 A, 13.52-0.1 and 13.52+0.1 A, 11.22-0.2 and 11.22+0.2 A, 9.96-0.1 and 9.96+0.1 A, 8.96-0.1 and 8.96+0.1 A, 7.73-0.1 and 7.73+0.1 A, 6.71-0.1 and 6.71+0.1 A, 5.99-0.1 and 5.99+0.1 A, 5.14-0.1 and 5.14+0.1 A, 4.51-0.1 and 4.51+0.1 A, 3.98-0.05 and 3.98+0.05 A, 3.86-0.05 and 3.86+0.05 A, 3.66-0.1 and 3.66+0.1 A, 3.47-0.05 and 3.47+0.05 A, 3.30-0.05 and 3.30+0.05 A, 3.14-0.1 and 3.14+0.1, and 2.99-0.05 and 2.99+0.05 A; therefore, the problems are solved well. The ZSM-5 / Magadiite / mordenite coexisting material can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha and ethylene and propylene through the dehydration of methanol.

Description

technical field [0001] The invention relates to a ZSM-5 / Magadiite / mordenite symbiotic material and a synthesis method thereof. Background technique [0002] ZSM-5 and mordenite porous materials are widely used in petrochemical and other fields due to their good shape-selective catalytic performance and good thermal stability. However, due to the uniform and single pore diameter of the mordenite material, the pore diameter is not easy to adjust at will, and complex components cannot be processed. Magadiite is a two-dimensional layered structure material. Its laminates are composed of negatively charged Si-0 tetrahedra, so it has good thermal stability. Magadiite has some typical properties of charged layered structure materials, such as water As well as the adsorption of some small polar organic molecules, there are hydrated sodium ions that can be exchanged between the layers, and the layers have good expansibility, which can accommodate molecules or groups ranging from pro...

Claims

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Application Information

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IPC IPC(8): C01B39/46C01B39/48C01B39/38C01B39/26
Inventor 谢在库马广伟肖景娴
Owner CHINA PETROLEUM & CHEM CORP
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