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Ats structure silicon phosphorus aluminum sapo-36 molecular sieve and its synthesis method

A technology of SAPO-36, synthesis method, applied in molecular sieve catalyst, molecular sieve and alkali-exchanged phosphate, molecular sieve characteristic silicoaluminophosphate, etc., can solve the problems of harsh synthesis conditions and narrow synthesis range

Active Publication Date: 2022-03-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis range of SAPO-36 molecular sieve is narrow, and the synthesis conditions are relatively harsh

Method used

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  • Ats structure silicon phosphorus aluminum sapo-36 molecular sieve and its synthesis method
  • Ats structure silicon phosphorus aluminum sapo-36 molecular sieve and its synthesis method
  • Ats structure silicon phosphorus aluminum sapo-36 molecular sieve and its synthesis method

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preparation example Construction

[0050] According to the first aspect of the present invention, the present invention provides a method for synthesizing an ATS structure silicon-phosphor-aluminum SAPO-36 molecular sieve, wherein the molecular sieve is synthesized by a liquid-phase inversion method of alumino-phosphorus dry glue or a hydrothermal method, and the template used for the synthesis is The agent is 4-pyrrolidinopyridine.

[0051] Specifically, in order to solve the above technical problems, the synthesis method includes:

[0052] providing an initial gel mixture containing a templating agent;

[0053] crystallizing the initial gel mixture;

[0054] Carrying out solid-liquid separation of the crystallized product, washing the obtained solid phase, drying and optionally roasting;

[0055] Wherein, the template agent is 4-pyrrolidinopyridine.

[0056] According to the present invention, the silicon-phosphor-aluminum SAPO-36 molecular sieve with ATS structure can be synthesized by the liquid-phase in...

specific Embodiment approach

[0058] According to a specific embodiment of the present invention, the liquid-phase conversion method of the phosphorus-aluminum dry glue comprises the following steps:

[0059] (1) providing a mixture A containing a phosphorus source, an aluminum source and water;

[0060] (2) Aging the mixture A, and then drying to obtain the phosphor-aluminum dry glue;

[0061] (3) initial gel mixture B is provided, and described initial gel mixture B contains the phosphorus-aluminum colloid made in step (2), silicon source, templating agent and water;

[0062] (4) crystallizing the initial gel mixture B;

[0063] (5) The crystallized product is subjected to solid-liquid separation, and the obtained solid phase is washed, dried and optionally calcined.

[0064] According to another specific embodiment of the present invention, the hydrothermal method comprises the following steps:

[0065] (1) providing an initial gel mixture C, which contains a phosphorus source, an aluminum source, a ...

Embodiment approach

[0070] According to the first specific embodiment of the present invention, in the method for synthesizing the ATS structure silicon-phosphorus-aluminum SAPO-36 molecular sieve of the present invention by adopting the liquid phase inversion method of phosphorus-aluminum dry glue, when preparing the mixture A, the mixture A Contains phosphorus source, aluminum source and water, said phosphorus source is P 2 o 5 In terms of the aluminum source as Al 2 o 3 In total, the molar ratio of phosphorus source, aluminum source and water is 0.6-1.2:1:30-70, preferably 0.8-1.2:1:35-65. When preparing the mixture A, the water is the total amount of water, for example, including the added water, and also includes the water in the phosphorus source and the aluminum source. When preparing the initial gel mixture B, the initial gel mixture B contains the phosphor-aluminum dry gel prepared in step (2), a silicon source, a templating agent and water, and the phosphor-aluminum dry gel is made o...

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Abstract

The invention relates to the field of synthesis of catalytic materials, and discloses an ATS structure silicon phosphorus aluminum SAPO‑36 molecular sieve and a synthesis method thereof, wherein the molecular sieve is synthesized by a phosphorus aluminum dry glue liquid phase conversion method or a hydrothermal method, and the template used for the synthesis is The agent is 4-pyrrolidinopyridine. In the present invention, 4-pyrrolidinylpyridine is used as template for the first time, and ATS structure silicon phosphorus aluminum SAPO-36 molecular sieve is synthesized by using phosphorus aluminum dry gel liquid phase conversion method or hydrothermal synthesis method, and it can be used in a wide synthesis range. Synthesis of pure-phase SAPO‑36 molecular sieves does not require the addition of any seed crystals.

Description

technical field [0001] The invention relates to the field of synthesis of catalytic materials, in particular to an ATS structure silicon phosphorus aluminum SAPO-36 molecular sieve and a synthesis method thereof. Background technique [0002] Since 1982, United Carbide Corporation (UCC) has developed a series of aluminum phosphorus molecular sieves AlPO 4 Since -n (n represents the structural model), aluminum-phosphorus molecular sieves have been widely used in the fields of adsorption, separation, catalysis and ion exchange. So far, more than 60 microporous aluminum-phosphorus molecular sieves with different structures have been synthesized by using different templates or structure-directing agents under hydrothermal or solvothermal conditions, and they have become an important family of porous materials. A typical aluminum phosphorus molecular sieve framework is composed of PO 4 Tetrahedron and AlO 4 The tetrahedron is strictly alternately arranged by oxygen bridges, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B37/08C01B39/54B01J29/85
CPCC01B37/08C01B39/54B01J29/85C01P2002/72C01P2004/03
Inventor 梁世航赵晨王永睿郑爱国黄哲昊阳泰民邹晓冬慕旭宏
Owner CHINA PETROLEUM & CHEM CORP