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High heat stability ordered mesoporous aluminum phosphate material and its preparing method

A kind of aluminum phosphate, stable technology, applied in the direction of molecular sieve characteristic aluminum phosphate, molecular sieve and alkali-exchanged phosphate, phosphorus compounds, etc., can solve the problems of less extensive application, low thermal stability, etc. The effect of high specific surface area

Inactive Publication Date: 2006-03-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with mesoporous silicon-based materials, the widespread application of mesoporous aluminum phosphate materials is still relatively small, mainly because of their relatively low thermal stability.

Method used

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  • High heat stability ordered mesoporous aluminum phosphate material and its preparing method
  • High heat stability ordered mesoporous aluminum phosphate material and its preparing method
  • High heat stability ordered mesoporous aluminum phosphate material and its preparing method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of highly thermally stable ordered mesoporous aluminum phosphate

[0021] First, using aluminum isopropoxide as the aluminum source, phosphoric acid as the phosphorus source, and TEAOH as the template, a precursor solution containing the primary and secondary structural units of the microporous aluminum phosphate zeolite molecular sieve was synthesized. Stir the above three raw materials according to a certain ratio at room temperature to form a clear solution, then put it into a stainless steel reactor with a polytetrafluoroethylene liner and place it at 140°C for 3 hours. After the solution was taken out, it was still a clear solution. The specific ratio is as follows, Al 2 o 3 :xP 2 o 5 :m(TEA) 2 O:nH 2 O, here x=2~3.2, m=2.5~3.5, n=150~200.

[0022] Experiments have shown that as long as the temperature fluctuates up and down within 20°C and the static storage time does not exceed 1 hour in the stainless steel reactor, that is, in the r...

Embodiment 2

[0032] Example 2: Preparation of heteroatom-containing ordered mesoporous aluminum phosphate materials with high thermal stability

[0033] When preparing the precursor solution, that is, when synthesizing the microporous aluminum phosphate molecular sieve directing agent, use butyl titanate as the titanium source, use tetraethyl orthosilicate as the silicon source, and use iron sulfate and copper sulfate as the iron source and copper Source, prepared microporous aluminum phosphate molecular sieve guide agent containing various heteroatoms. Using the same raw material as in Example 1 and the same molar ratio range as in Example 1, the solution raw material consumption containing cations is Ti 4+ or Si 4+ or Fe 3+ or Cu 2+ with Al 2 o 3 The molar ratio is greater than 0 to 0.5. Process is also substantially the same as in Example 1. The prepared mesoporous aluminum phosphate material containing various heteroatoms. These samples were named Ti-JLU-50, Si-JLU-50, Cu-JLU-5...

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Abstract

The present invention is high heat stability ordered mesoporous aluminum phosphate material and its preparation process, and belongs to the field of inorganic chemistry and physical chemistry technology. The mesoporous aluminum phosphate material has composition of P2O5-Al2O3-MXOY, skeleton with primary and secondary zeolite structure units, 2D hexagonal structure, high heat stability and high degree of order. The preparation process includes synthesizing precursor solution containing the primary and secondary microporous aluminum phosphate zeolite structure units by using organic amine as template agent; and subsequent self-assembling process of the precursor and cationic surfactant to synthesize the ordered mesoporous aluminum phosphate material. The prepared mesoporous material has high specific surface area and atom connecting mode of microporous molecular sieve, may have several hetero atoms introduced, and may be used widely in chemical fields.

Description

technical field [0001] The invention belongs to the field of inorganic chemistry and physical chemistry, and in particular relates to an ordered mesoporous material with high thermal stability and a preparation method. Background technique [0002] Since Mobil Corporation of the United States successfully synthesized M41S pure silicon mesoporous molecular sieves, mesoporous materials have been a hot research topic. In the synthesis and application research of mesoporous molecular sieves, non-silicon materials are gradually being favored by more and more researchers. Due to the similarity between silica and aluminum phosphate in zeolitic molecular sieves and the existence of aluminum phosphate molecular sieves with various structures, it is easy to think of extending the mesoporous synthesis to aluminum phosphate materials [see Cabrera S., Haskouri J.E., Guillem C., Beltrán-Porter A., ​​Beltrán-Porter D., Mendioroz S., Marcos M.D., Amorós P., Chem. Commun., 1999, 333. and Wa...

Claims

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Application Information

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IPC IPC(8): C01B39/54C01B37/04
Inventor 肖丰收林凯峰孟凡艳王利丰
Owner JILIN UNIV
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