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SCM-22 molecular sieve and synthetic method thereof

A technology for synthesizing mother liquor and composition, applied in molecular sieve compound, molecular sieve and alkali exchange phosphate, molecular sieve catalyst, etc., can solve the problems of late artificial synthesis of aluminum phosphate molecular sieve and no structure found.

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with zeolite molecular sieves, the artificial synthesis of aluminum phosphate molecular sieves is relatively late
In 1971, Flanigen et al. reported the synthesis of aluminum phosphate molecular sieves [Molecular Sieve Zeolites-I, ACS, Washington D.C]. Under hydrothermal synthesis conditions, mixed oxides of aluminum, silicon and phosphorus were obtained with analcime, chabazite, phillipsite -harmotome, L-type molecular sieve, A-type molecular sieve and B-type molecular sieve and other silicon-phosphorus-aluminum molecular sieves with the same crystal structure, wherein the content of phosphorus is 5-25% (as P2O5 ), but no structure different from zeolite molecular sieves was found

Method used

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  • SCM-22 molecular sieve and synthetic method thereof
  • SCM-22 molecular sieve and synthetic method thereof
  • SCM-22 molecular sieve and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Weigh 13.8 grams of 16.31% N,N'-[1,4-phenylene bis(methylene)]bis(1,4-diazacyclo[2,2,2]octane) Ammonium hydroxide (hereinafter abbreviated as R) solution, then while stirring, add 0.43 gram of aluminum isopropoxide and 0.14 gram of zinc acetate, then slowly add 1.15 gram of concentration of phosphoric acid solution of 85%, after stirring Can obtain the synthetic mother liquor that has following molar ratio composition:

[0033] 0.40ZnO:1.0Al 2 o 3 :2.4P 2 o 5 :3.0R:190H 2 o

[0034] The above synthetic mother liquor is placed in a closed reaction container for crystallization, the crystallization temperature is 150°C, and the crystallization time is 120 hours. After the crystallized product is washed and dried, a metal aluminophosphate is obtained, which has the following properties: figure 1 As shown in the XRD pattern, the skeleton composition of the obtained aluminophosphate is Zn 0.08 Al 0.42 P 0.5 o 2 .

Embodiment 2

[0036] Weigh 13.8 grams of 16.31% N,N'-[1,4-phenylene bis(methylene)]bis(1,4-diazacyclo[2,2,2]octane) Ammonium hydroxide (hereinafter abbreviated as R) solution, then while stirring, add 0.43 gram of aluminum isopropoxide and 0.14 gram of zinc acetate, then slowly add 1.15 gram of concentration of phosphoric acid solution of 85%, after stirring Can obtain the synthetic mother liquor that has following molar ratio composition:

[0037] 0.40ZnO:1.0Al 2 o 3 :2.4P 2 o 5 :3.0R:190H 2 o

[0038] The above synthetic mother liquor is placed in a closed reaction container for crystallization, the crystallization temperature is 155°C, and the crystallization time is 120 hours. After the crystallized product is washed and dried, metal aluminophosphate is obtained. The obtained aluminophosphate Skeleton composition is Zn 0.09 Al 0.41 P 0.5 o 2 .

Embodiment 3

[0040] Weigh 13.8 grams of 16.31% N,N'-[1,4-phenylene bis(methylene)]bis(1,4-diazacyclo[2,2,2]octane) Ammonium hydroxide (hereinafter abbreviated as R) solution, then while stirring, add 0.43 gram of aluminum isopropoxide and 0.14 gram of zinc acetate, then slowly add 1.15 gram of concentration of phosphoric acid solution of 85%, after stirring Can obtain the synthetic mother liquor that has following molar ratio composition:

[0041] 0.40ZnO:1.0Al 2 o 3 :2.4P 2 o 5 :3.0R:190H 2 o

[0042] The above synthetic mother liquor is placed in a closed reaction container for crystallization, the crystallization temperature is 160°C, and the crystallization time is 108 hours. After the crystallized product is washed and dried, metal aluminophosphate is obtained. The obtained aluminophosphate Skeleton composition is Zn 0.09 Al 0.41 P 0.5 o 2 .

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Abstract

The invention relates to a novel SCM-22 metal aluminophosphate and a preparation method thereof. The skeleton of the metal aluminophosphate has the following molar ratio composition: (M<x>Al<y>P<z>)O<2>, M is one of zinc, cobalt and magnesium, x is greater than or equal to 0.01 and less than or equal to 0.4, z is greater than or equal to 0.3 and less than or equal to 0.6, and x + y + z = 1. The metal aluminophosphate has a unique X-ray diffraction pattern, can be used as an adsorbent, and can also be used as a catalyst or a catalyst carrier.

Description

technical field [0001] The invention relates to a metal aluminophosphate and a preparation method thereof. Background technique [0002] Most of the metal aluminophosphates belong to the large family of molecular sieves. Molecular sieves are a kind of porous crystalline materials. There are more than 230 types of molecular sieves with known structures, and molecular sieves with new structures are constantly emerging. Most molecular sieves have a large internal specific surface area and an open internal space, which can be used as a place for the reaction to occur, and can also be used to accommodate some guest molecules, such as metals, metal oxides, organic molecules, water molecules, and so on. Since molecular sieves have uniform and regular pores, and the size of the pores is of the same order as that of molecules, it is possible to "select" the entry and exit of molecules, thereby obtaining a shape-selective effect. Because molecular sieves have the above characteristi...

Claims

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Application Information

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IPC IPC(8): C01B39/54C01B37/06B01J20/02B01J20/30B01J29/83
CPCC01B39/54C01B37/065B01J20/02B01J20/30B01J29/83C01P2002/72Y02P20/52
Inventor 袁志庆付文华王振东
Owner CHINA PETROLEUM & CHEM CORP
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