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Quick synthesis method of heteroatomic aluminophosphate molecular sieve SAPO-5 in eutectic body

A technology of SAPO-5 and aluminum phosphorus molecular sieve, which is applied in the direction of molecular sieve and alkali exchange phosphate, molecular sieve characteristic silicoaluminophosphate, etc., can solve the problems of long crystallization time, environmental pollution, hidden safety hazards, etc., and achieve a safe environment, molecular sieve The effect of fast crystallization rate

Inactive Publication Date: 2012-07-18
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional synthesis method has certain safety hazards, and the crystallization time is long, requiring the addition of toxic organic templates, which pollutes the environment

Method used

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  • Quick synthesis method of heteroatomic aluminophosphate molecular sieve SAPO-5 in eutectic body
  • Quick synthesis method of heteroatomic aluminophosphate molecular sieve SAPO-5 in eutectic body
  • Quick synthesis method of heteroatomic aluminophosphate molecular sieve SAPO-5 in eutectic body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] After 2.8g of pentaerythritol, 8.4g of choline chloride, 0.222g of pseudoboehmite and 0.036g of white carbon black were mixed uniformly, they were transferred to a three-necked flask, and then 0.21ml of phosphoric acid and 0.034g of hydrofluoric acid were added to form a mixture ( Mole ratio) is: 54DES:1.0P 2 o 5 :Al 2 o 3 :0.45HF:0.4SiO 2 ; Heat the mixture to 120-125°C and mix well; the above mixture is heated to 180°C under microwave radiation, and crystallized under normal pressure for 60 minutes; the above reaction mixture is cooled to room temperature, vacuum filtered, and the product is washed repeatedly with water and acetone , and dried at 80° C. for 3 hours to obtain a powder product. Such as figure 1 , figure 2 Shown, through XRD detection, this powder product is SAPO-5 molecular sieve.

Embodiment 2

[0017] After 2.8g of pentaerythritol, 8.4g of choline chloride, 0.222g of pseudoboehmite and 0.036g of white carbon black were mixed uniformly, they were transferred to a three-necked flask, and then 0.42ml of phosphoric acid and 0.038g of hydrofluoric acid were added to form a mixture ( Mole ratio) is: 54DES:2.0P 2 o 5 :Al 2 o 3 :0.5HF:0.4SiO 2 ; Heat the mixture to 120-125°C and mix well; the above mixture is heated to 180°C under microwave radiation, and crystallized under normal pressure for 60 minutes; the above reaction mixture is cooled to room temperature, vacuum filtered, and the product is washed repeatedly with water and acetone , and dried at 80° C. for 3 hours to obtain a powder product. Such as figure 1 , figure 2 Shown, through XRD detection, this powder product is SAPO-5 molecular sieve.

Embodiment 3

[0019] After 2.8g of pentaerythritol, 8.4g of choline chloride, 0.222g of pseudoboehmite and 0.036g of white carbon black were mixed uniformly, they were transferred to a three-necked flask, and then 0.42ml of phosphoric acid and 0.070g of hydrofluoric acid were added to form a mixture ( Mole ratio) is: 54DES:2.0P 2 o 5 :Al 2 o 3 :0.93HF:0.4SiO 2 ; Heat the mixture to 120-125°C and mix well; the above mixture is heated to 180°C under microwave radiation, and crystallized under normal pressure for 60 minutes; the above reaction mixture is cooled to room temperature, vacuum filtered, and the product is washed repeatedly with water and acetone , and dried at 80° C. for 3 hours to obtain a powder product. Such as figure 1 , figure 2 Shown, through XRD detection, this powder product is SAPO-5 molecular sieve.

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Abstract

The invention relates to a quick synthesis method of heteroatomic aluminophosphate molecular sieve SAPO-5 in an eutectic body, which comprises the following steps that: A) the eutectic body, an aluminum source and a silicon source are uniformly blended, then phosphoric acid and hydrofluoric acid are added into the mixture, the prepared mixture (according to the mol ratio) is that: aDES: bP2O5: Al2O3: cHF: dSiO2, wherein a= 54 to 162, b=1.0 to 2.0, c=0.45 to 0.93, d=0.2 to 0.8, the mixture is heated under the temperature of 120 to 125 DEG C, so the mixture is uniformly blended; B) the mixture obtained in step A is heated under the radiation of microwaves to 160 to 180 DEG C, and then the mixture is crystallized for 15 to 60 minutes under a normal pressure; and C) the reaction mixture obtained in step B is cooled to the room temperature and is subjected to vacuum filtration, products are repeatedly washed by water and acetone and are dried under the temperature of 80 to 100 DEG C, so a powder product of the heteroatomic aluminophosphate molecular sieve SAPO-5 is obtained.

Description

technical field [0001] The invention relates to a method for synthesizing molecular sieve materials. Background technique [0002] In 1982, scientists from UCC successfully synthesized and developed a brand new molecular sieve family - aluminum phosphate molecular sieve AlPO 4 -n (n is the number), which is an important milestone in the history of the development of porous materials. Due to AlPO 4 -n has a neutral skeleton structure, no ion exchange performance, and weak surface acidity, so people are interested in A1PO 4 -n Molecular sieve modification research, through the isomorphic replacement, many elements partially replace the phosphorus or aluminum of the skeleton, and a series of molecular sieve crystals with a certain skeleton structure are prepared. where silicon is introduced into AlPO 4 The SAPO-n series molecular sieves are derived from the series of skeletons. SAPO-n molecular sieves have cation exchange capacity and adjustable acidity; at the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/08
Inventor 赵新红王华亢春喜骆翠红
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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