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Method for preparing AlPO4-9 aluminium phosphate molecular sieve

A technology of aluminum phosphate molecular sieve and synthesis method, applied in the direction of molecular sieve characteristic aluminum phosphate, molecular sieve and alkali-exchanged phosphate, phosphorus compound, etc., can solve problems such as unreported crystal structure

Inactive Publication Date: 2011-06-22
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only its X-ray diffraction pattern (XRD) is given in the patent, and its crystal structure has not been reported so far

Method used

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  • Method for preparing AlPO4-9 aluminium phosphate molecular sieve
  • Method for preparing AlPO4-9 aluminium phosphate molecular sieve
  • Method for preparing AlPO4-9 aluminium phosphate molecular sieve

Examples

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Effect test

example 1

[0015] Example 1, at first prepare the piperazine solution of 0.434 mol / liter. In a 100ml beaker, mix 2ml of ethylene glycol with 15ml of piperazine solution, stir for 10 minutes, add 1.702g of aluminum isopropoxide, stir for another 30 minutes, then add 1.14ml of 85% H 3 PO 4 , after stirring for 1 hour, a homogeneous mixture was formed, and then transferred to a stainless steel reactor with a polytetrafluoroethylene liner, crystallized at 180 ° C for 5 days to obtain colorless transparent crystals, washed with distilled water and suction filtered, in The target product was obtained after drying at room temperature. The product was characterized using the following instruments and methods:

[0016] 1. Use the SHIMADZU SS-550 scanning electron microscope to obtain the morphology of the crystal ( figure 1 )

[0017] 2, use Bruker-D8 type X-ray diffractometer to measure the X-ray powder diffraction spectrum of product, obtain the XRD figure of product ( figure 2 ).

[001...

example 2

[0027] Example 2, at first prepare the piperazine solution of 0.434 mol / liter. In a 100ml beaker, mix 2ml of ethylene glycol with 15ml of piperazine solution, stir for 10 minutes, add 1.702g of aluminum isopropoxide, stir for another 30 minutes, then add 1.14ml of 85% H 3 PO 4 , after stirring for 1 hour, a homogeneous mixture was formed, and then transferred to a stainless steel reactor with a polytetrafluoroethylene liner, crystallized at 170 ° C for 5 days to obtain colorless transparent crystals, washed with distilled water and suction filtered, in The target product was obtained after drying at room temperature. Every characterization and result are identical with example 1.

example 3

[0028] Example 3, at first prepare the piperazine solution of 0.451 mol / liter. In a 100ml beaker, mix 2ml of ethylene glycol with 15ml of piperazine solution, stir for 10 minutes, add 1.702g of aluminum isopropoxide, stir for another 30 minutes, then add 1.14ml of 85% H 3 PO 4 After stirring for 1 hour, a homogeneous mixture was formed, and then transferred to a stainless steel reactor with a polytetrafluoroethylene liner, and crystallized at 180°C for 9 days to obtain colorless transparent crystals, which were washed with distilled water and suction filtered. The target product was obtained after drying at room temperature. Every characterization and result are identical with example 1.

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PUM

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Abstract

The invention relates to a method for preparing a AlPO4-9 aluminium phosphate molecular sieve, and a crystal structure. The chemical formula is [C2H7Al5.50NO25P6]. Piperazine is taken as a template, water and glycol are mixed to serve as a solvent, and the molecular sieve is synthesized by a hydrothermal process. The molecular sieve comprises three basic structural units, has one-dimensional curved octatomic ring pores in the [101] direction, has high stability and is widely applied to catalysis, ion exchange, gas separation and the like.

Description

technical field [0001] The present invention relates to AlPO 4 Preparation and structure of -9 aluminum phosphate molecular sieve. Using piperazine as template and water and ethylene glycol as solvent, AlPO with high stability was synthesized by hydrothermal method 4 -9 aluminum phosphate molecular sieve, and AlPO 4 There is a one-dimensional curved eight-membered ring channel in the [101] direction in the -9 structure. technical background [0002] The synthesis of aluminum phosphate molecular sieves with a microporous structure began with the report of Wilson et al. in 1982, and templates must be involved in all synthesis systems. This type of material has a rich and diverse structure, and most of them have open pore systems, which can increase the diffusion rate of molecules in chemical reactions, so they have potential application prospects in catalysis, ion exchange, and gas separation. [0003] The first report on the synthesis of AlPO 4 -9 also appeared in 1982 (...

Claims

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Application Information

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IPC IPC(8): C01B37/04C01B39/54
Inventor 李牛丁月项寿鹤
Owner NANKAI UNIV
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