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Beta zeolite /Magadiite/mordenite coexisting material and method for synthesizing same

A technology of mordenite and synthesis method, which is applied in the direction of chemical instruments and methods, crystalline aluminosilicate zeolite, mercerized crystalline aluminosilicate zeolite, etc., can solve the problems of single pore diameter of porous materials and non-arbitrary adjustment of pore diameter, and achieve ratio Increased surface area, good catalytic performance, and improved selectivity

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 the problem 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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  • Beta zeolite /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 desired seed crystal of 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 required seed crystal of 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 A and C solutions into the mercerizing solution respectively, stir vigorously, add 2.6 grams of sodium hydroxide and 29.4 grams of tetraethylammonium hydroxide, and then add 1.2 grams of mordenite seed crystal M1, stir for a period of time, use dilute Sulfuric acid adjusts the pH value at 11, and the molar ratio of the control sol is: Si: Al: Na: M: H 2 O=1:0.005:0.6:0.2:40, put the mixed solution in an autoclave, keep it warm at 160°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, and roast at 550°C for 3 hours to obtain β Zeolite / Magadiite / mordenite intergrowth material, XRD diffraction pattern as figure 1 As shown, there are d-spacing maxima at ...

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Abstract

The invention relates to a beta zeolite / 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 beta zeolite / Magadiite / mordenite coexisting material. A mole relation of the components of the synthesized beta zeolite / Magadiite / mordenite coexisting material is nSiO2 :Al2O3, wherein n is between 10 and 1,000; the beta zeolite / Magadiite / mordenite coexisting material has two coexisting phases; the XRD diffraction pattern of the beta zeolite / 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, 11.32-0.1 and 11.32+0.1 A, 11.14-0.05 and 11.14+0.05 A, 9.96-0.1 and 9.96+0.1 A, 8.96-0.1 and 8.96+0.1 A, 7.74-0.1 and 7.74+0.1 A, 6.71-0.1 and 6.71+0.1 A, 5.14-0.1 and 5.14+0.1 A, 4.51-0.1 and 4.51+0.1 A, 4.14-0.05 and 4.14+0.05 A, 3.96-0.05 and 3.96+0.05 A, 3.86-0.04 and 3.86+0.04 A, 3.65-0.05 and 3.65+0.05 A, 3.47-0.1 and 3.47+0.1 A, 3.30-0.05 and 3.30+0.05 A, 3.14-0.1 and 3.14+0.1, and 3.02-0.05 and 3.02+0.05 A; therefore, the problems are solved well. The beta zeolite / 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 beta zeolite / Magadiite / mordenite symbiotic material and a synthesis method thereof. Background technique [0002] Beta zeolite 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 ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/46C01B39/48C01B39/26
Inventor 谢在库马广伟滕加伟肖景娴
Owner CHINA PETROLEUM & CHEM CORP
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