Process for producing SAPO-5 molecular sieve

A technology of SAPO-5 and molecular sieves, which is applied in the field of preparation of SAPO-5 molecular sieves, can solve the problems of small phosphorus-aluminum ratio synthesis range, low crystallinity, complex equipment, etc., and achieve the benefits of environmental protection, saving consumption and reducing requirements Effect

Inactive Publication Date: 2009-05-13
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the hydrothermal synthesis method, this method has relatively low crystallinity, the prepared molecular sieve has a smaller synthesis range of silicon-aluminum ratio and phosphorus-aluminum ratio, complex equipment, and is not easy to scale up.

Method used

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  • Process for producing SAPO-5 molecular sieve
  • Process for producing SAPO-5 molecular sieve
  • Process for producing SAPO-5 molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add silica sol, pseudo-boehmite and 50% orthophosphoric acid into water according to the above order, stir, and wait until the former substance is evenly mixed before adding the latter substance to obtain the precursor sol of molecular sieve, silicon, aluminum and phosphorus The precursor substances are SiO 2 、Al 2 o 3 and P 2 o 5 Calculated, the molar ratio of each component added is: SiO 2 :Al 2 o 3 :P 2 o 5 :H 2 O=0.1:1.0:0.5:300;

[0035] Stir the above-mentioned molecular sieve precursor sol at room temperature for 2 hours, then raise the temperature to 50°C, and continue stirring until the water in the sol is evaporated to dryness to obtain a dry glue;

[0036] Grind the obtained dry glue into powder and mix it evenly with the aqueous solution of triethylamine template agent, put it in the reaction kettle, seal the reaction kettle, react at 120°C for 48h, then cool in the natural state, filter to obtain a solid sample, The mass ratio of described dry gl...

Embodiment 2

[0039] Add silica gel, aluminum isopropoxide and 70% orthophosphoric acid into water according to the above order, stir, and wait until the former substance is evenly mixed before adding the latter substance to obtain the precursor sol of molecular sieve, silicon, aluminum and Phosphorus precursors are SiO 2 、Al 2 o 3and P 2 o 5 Calculated, the molar ratio of each component added is: SiO 2 :Al 2 o 3 :P 2 o 5 :H 2 O=2.0:1.0:0.1:200;

[0040] Stir the above-mentioned molecular sieve precursor sol at room temperature for 5 hours, then raise the temperature to 60° C., and continue stirring until the water in the sol is evaporated to dryness to obtain dry glue;

[0041] Grind the obtained dry glue into powder and mix it evenly with the aqueous solution of tripropylamine template agent, put it in the reaction kettle, seal the reaction kettle, react at 200°C for 54h, then cool in the natural state, and filter to obtain a solid sample. The mass ratio of described dry glue p...

Embodiment 3

[0044] Add silicon dioxide, aluminum hydroxide and 85% orthophosphoric acid into water according to the above order, stir, and wait until the former substance is evenly mixed before adding the latter substance to obtain the precursor sol of molecular sieve, silicon, aluminum and phosphorus The precursor substances are SiO 2 、Al 2 o 3 and P 2 o 5 Calculated, the molar ratio of each component added is: SiO 2 :Al 2 o 3 :P 2 o 5 :H 2 O=1.0:1.0:2.0:10;

[0045] Stir the above-mentioned molecular sieve precursor sol at room temperature for 3 hours, then raise the temperature to 70°C, and continue stirring until the water in the sol is evaporated to dryness to obtain a dry glue;

[0046] Grind the obtained dry glue into powder and mix it evenly with the aqueous solution of dipropylamine template agent, put it in the reaction kettle, seal the reaction kettle, react at 220°C for 64h, then cool in the natural state, and filter to obtain a solid sample. The mass ratio of descr...

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Abstract

The invention discloses a method for preparing SAPO-5 molecular sieve, which aims to provide a method for preparing SAPO-5 molecular sieve with the advantages of simple preparation method, low requirement for equipment, good degree of crystallinity, and recoverable template agent. The invention mainly comprises technical steps as follows: precursors of silicon, aluminum and phosphorus are added into water and stirred to preparing the precursor sol of molecular sieve; the water in the sol is evaporated to dryness and dry glue is prepared; then the dry glue powder is evenly mixed with an aqueous solution of an organic amine template agent and placed into a sealed reaction kettle, reacts for 48h-120h at 120 DEG C-220DEG C, and is cooled to the room temperature in the natural state; the solid sample obtained after filtration is washed, dried, and baked for 0.5h-10h at 450 DEG C-650 DEG C; and SAPO-5 molecular sieve can be obtained.

Description

technical field [0001] The invention relates to a preparation method of SAPO-5 molecular sieve, in particular to a method for preparing SAPO-5 by liquid phase crystallization. Background technique [0002] Silicoaluminophosphate molecular sieves are a type of molecular sieve catalysts with potential uses developed by UCC Corporation of the United States in 1982. Its skeleton is negatively charged, so it has exchangeable cations and has proton acidity. Because silicoaluminophosphate (SAPO) molecular sieve has a new crystal structure, good thermal stability and hydrothermal stability, it has been widely used in petrochemical and petroleum processing. SAPO-5 molecular sieve belongs to a new type of 3D microporous silicoaluminophosphate crystal, its crystal structure is similar to that of AlPO 4 -5 is similar, with SiO 4 , AlO 4 and PO 4 Tetrahedral structure, belonging to large-pore zeolite, can be used as adsorbent, catalyst and catalyst carrier, especially in the cracking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54
Inventor 肖钢侯晓峰李建青
Owner HANERGY TECH
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