A kind of ael structure ceapo-11 molecular sieve and preparation method thereof

A ceapo-11, molecular sieve technology, applied in the direction of molecular sieve and alkali exchange of phosphate, can solve the problems of narrow synthesis range and increased production cost, and achieve the effects of high utilization rate of inorganic atoms, good crystallinity and simple synthesis steps

Active Publication Date: 2021-07-20
YANCHENG ENVIRONMENTAL ENG TECH RES & DEV CENT TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthetic route that can be applied to industrial production on a large scale is still the hydrothermal route, because other synthetic routes involve the use of organic solvents, which increases the production cost, and the applicable synthetic range is relatively narrow

Method used

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  • A kind of ael structure ceapo-11 molecular sieve and preparation method thereof
  • A kind of ael structure ceapo-11 molecular sieve and preparation method thereof
  • A kind of ael structure ceapo-11 molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 1-4 As shown, a CeAPO-11 molecular sieve with AEL structure is composed of metal salt, aluminum source, phosphorus source, cerium source, fluorine source and organic amine template agent, which are mixed into dry powder or granules, followed by crystallization reaction, drying and roasting. Prepared.

[0026] A preparation method of AEL structure CeAPO-11 molecular sieve d, comprising the following steps:

[0027] First, weigh the solid reaction raw materials: 2.084g aluminum isopropoxide, 1.153g phosphoric acid, 0.087g cerium nitrate, 0.205g hydrofluoric acid and 0.607g diisopropylamine, pour them into a mortar, and grind them uniformly for 10-30 minutes. The state of the mixture changes from viscous to wet to dry powder or granules. After the grinding is completed, put it into the reaction kettle and crystallize at 150°C for 8 hours. After the crystallization is completed, cool it at room temperature. After the solid crystallization product is separat...

Embodiment 2

[0031] The preparation method of CeAPO-11 molecular sieve is the same as the addition sequence and grinding time of aluminum isopropoxide, phosphoric acid, cerium nitrate, hydrofluoric acid and diisopropylamine in Example 1, and the chemical molar ratio of this system is: A1 2 o 3 :P 2 o 5 : CeO 2 :F - : R = 1:1:0.04:1:1, put it into the reaction kettle after grinding, crystallize at 150°C for 12h, after the crystallization is complete, cool at room temperature, separate the solid crystal product from the mother liquor, and use deionized water The solid crystalline product was washed to neutrality, the obtained product was fully washed with deionized water, and dried at 80°C, and the utilization rate of its inorganic atoms was 85.5%.

[0032] The rest are the same as embodiment 1.

Embodiment 3

[0034] The preparation method of CeAPO-11 molecular sieve is the same as the addition sequence and grinding time of aluminum isopropoxide, phosphoric acid, cerium nitrate, hydrofluoric acid and diisopropylamine in Example 1. The chemical ratio of the system is as follows: A1 2 o 3 :P 2 o 5 : CeO 2:F - : R = 1:1:0:1:1, crystallized at 150°C for 12h. After the reaction was completed, the obtained product was thoroughly washed with deionized water and dried at 80 °C.

[0035] The rest are the same as embodiment 1.

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Abstract

A CeAPO‑11 molecular sieve with an AEL structure and a preparation method thereof in the present invention, the CeAPO‑11 molecular sieve is synthesized by solid-phase grinding, first of all, the metal salt, the aluminum source, the phosphorus source, the fluorine source and the organic amine template are weighed according to a certain ratio Transfer to a mortar for 10-30 min uniform mixing and grinding, the state of the mixture changes from viscous to dry powder or granules, and then put it into the reactor for crystallization reaction; after the crystallization is completed, it is cooled rapidly, and the solid product is washed with deionized water until Neutral, after drying in the air at 80-120°C, the raw molecular sieve powder is obtained; the raw molecular sieve powder is roasted in the air at 550°C for 5 hours to obtain the final product. The CeAPO-11 molecular sieve with better crystallinity can be obtained by the present invention, the synthetic route only involves the mixing of primary raw materials, the synthetic steps are simpler than the traditional method, and the yield and single-pot utilization are higher, greatly reducing the production cost, energy saving and emission reduction, and has broad prospects for industrial application.

Description

technical field [0001] The invention belongs to the field of molecular sieve preparation, and in particular relates to an AEL structure CeAPO-11 molecular sieve and a preparation method. Background technique [0002] Molecular sieve microporous materials such as aluminum phosphate can be used in catalysis, adsorption, separation, host-guest chemistry and other fields due to their regular pore structure, large specific surface area, flexibility of aluminum framework and high thermal stability. Metal heteroatom aluminum phosphate molecular sieve MeAPO, as a kind of aluminum phosphorus molecular sieve family, has a certain ion exchange capacity, acidity and oxidation properties, and their diverse structures and unique properties have been widely used in the field of catalytic industry. MeAPO-11 molecular sieve has been widely used in hydroisomerization and other fields because of its suitable one-dimensional ten-membered ring structure and mild acidic properties. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/54
CPCC01B39/54C01P2002/72C01P2004/03
Inventor 陈建军高向平李俊华刘海岩赵新红
Owner YANCHENG ENVIRONMENTAL ENG TECH RES & DEV CENT TSINGHUA UNIV
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