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AFO structured silicon-aluminium phosphate molecular sieve and synthetic method therefor

A technology of silicoaluminophosphate and molecular sieve, which is applied in the direction of molecular sieve catalyst, molecular sieve and alkali exchange phosphate, molecular sieve characteristic silicoaluminophosphate, etc., can solve the problem of not reporting XRD spectrum data, etc.

Inactive Publication Date: 2004-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document does not report the XRD spectrum data at room temperature after deamination of molecular sieves by calcination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 288.2 grams of phosphoric acid and 504.0 grams of deionized water were added to a gelling kettle placed in a water bath at 35° C. and stirred evenly. After stirring for 30 minutes, 177.1 grams of hydrated alumina was added thereto and stirred for 2 hours. Then, a mixture of 22.6 grams of diethylamine and 50.8 grams of di-n-propylamine was added to the above-mentioned gelling kettle, and after stirring and mixing for 1 hour, 39.1 grams of silica sol was added, and after stirring evenly, 15.8 grams of the AEL structure synthesized in Comparative Example 1 were added. Molecular sieves, and stir the mixture well for 2 hours. Pack it into a stainless steel crystallization kettle, stir and crystallize at 175°C and autogenous pressure for 30 hours. Then filter, wash, and dry the crystallized product at 100-110°C to obtain the original molecular sieve powder product. A part of the crystallized product was taken for XRD measurement, and the result was consistent with the data i...

Embodiment 2

[0050] 288.2 grams of phosphoric acid and 504.0 grams of deionized water were added to a gelling kettle placed in a water bath at 38° C. and mixed evenly. After stirring for 30 minutes, 177.1 grams of hydrated alumina was added thereto and stirred for 2 hours. Then, the mixture of 34.6 grams of diethylamine and 50.0 grams of di-n-propylamine was added to the above-mentioned gelling kettle, and after stirring and mixing for 1 hour, 57.0 grams of silica sol were added, and after stirring, 15.8 grams of AEL synthesized in Comparative Example 2 and AFO structure molecular sieve mixture, fully stir the mixture for 2 hours. Pack it into a stainless steel crystallization kettle, stir and crystallize at 180°C and autogenous pressure for 32 hours. Then filter, wash, and dry the crystallized product at 100-110°C to obtain the original molecular sieve powder product. A part of the crystallized product was taken for XRD measurement, and the result was consistent with the data in Table 1,...

Embodiment 3

[0053] 230.6 grams of phosphoric acid and 987.0 grams of deionized water were added to a gelling kettle placed in a water bath at 42°C, mixed and evenly stirred. After stirring for 30 minutes, 177.1 grams of hydrated alumina was added thereto and stirred for 2 hours. Then, a mixture of 30.4 grams of diethylamine and 40.6 grams of di-n-propylamine was added to the above-mentioned gelling kettle, and after stirring and mixing for 1 hour, 72.1 grams of silica sol was added and stirred evenly to form a reaction mixture. Part of the reaction mixture was packed into a stainless steel crystallization kettle, and stirred and crystallized at 190° C. under autogenous pressure for 42 hours. Then filter, wash, and dry the crystallized product at 100-110°C to obtain the original molecular sieve powder product. A part of the crystallized product was taken for XRD measurement, and the result was consistent with the characteristics in Table 1, which indicated that the molecular sieve synthesi...

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PUM

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Abstract

The present invention discloses one kind of silicon aluminum phosphate molecular sieve in AFO structure. It has molar composition in oxide form of Al2O3:yP2O5:zSiO2, where y is 0.60-1.20 and z is 0.05-1.3. It features that the molar composition before roasting to eliminate templating agent is (x1R1+x2R2):Al2O3:yP2O5:zSiO2, where R1 and R2 are templating agent in crystal pores of molecular sieve, R1 is diethylamine, R2 is di-n-propylamine, x1+x2 is 0.01-0.35, and neither x1 nor x2 is zero. The molecular sieve is synthesized with double templating agent and crystal seed and through high temperature synthesis.

Description

technical field [0001] The present invention relates to a molecular sieve with an AFO structure and a synthesis method thereof, more specifically to a silicoaluminophosphate molecular sieve with an AFO structure and a synthesis method thereof. Background technique [0002] Aluminum phosphate molecular sieve is a new generation of molecular sieve (USP4310440) invented by UCC Company in the United States in the early 1980s after aluminum silicate molecular sieve. Since the molecular sieve framework is electrically neutral, it has no cation exchange performance and catalytic reaction performance. [0003] AFO (AlPO 4 -41) Structural molecular sieve is a kind of aluminum phosphate molecular sieve, which belongs to the orthorhombic crystal system, and the space group is Cmc2 1 , the unit cell constants are a=9.7, b=25.8, c=8.4, and its single-dimensional ten-membered ring channel is 4.3×7.0 (Zeolites, 1996, volume 17, pages 28-29), and its The main diffraction peak data in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C01B37/08C01B39/54
Inventor 李黎声张凤美舒兴田秦凤明王卫东方文秀
Owner CHINA PETROLEUM & CHEM CORP
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