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Metal silicon-aluminum phosphate molecular sieve with AFO structure and synthesis method thereof

A technology of silicoaluminophosphate and molecular sieve, which is applied in the direction of molecular sieve catalyst, molecular sieve characteristic aluminum phosphate, molecular sieve and alkali-exchanged phosphate, etc. It can solve the problems that have not been seen, and achieve the effect of simple process, low cost and low dosage

Active Publication Date: 2009-02-18
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no report about other metal silicoaluminophosphate molecular sieves with AFO structure

Method used

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  • Metal silicon-aluminum phosphate molecular sieve with AFO structure and synthesis method thereof
  • Metal silicon-aluminum phosphate molecular sieve with AFO structure and synthesis method thereof
  • Metal silicon-aluminum phosphate molecular sieve with AFO structure and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 177 grams of phosphoric acid (85%, the same below) and 600 grams of deionized water were added into the gelling tank and mixed and stirred evenly. After stirring for 30 minutes, 312.1 grams of aluminum isopropoxide was added thereto and stirred and mixed for 2 hours. Then, a mixture of 24 grams of diethylamine (chemically pure, the same below) and 32.5 grams of di-n-propylamine (chemically pure, the same below) was added to the above-mentioned gel-forming kettle, and after stirring and mixing for 1 hour, 77.3 grams of silica sol were added (25Wt.% SiO 2 , the same below), fully stirred for 2 hours, and added 8 grams of SAPO-41 as a seed crystal to prepare a reaction mixture. The mixture was packaged into a stainless steel crystallization kettle, stirred and crystallized at 185°C for 3 hours under autogenous pressure, and then the temperature was lowered until the pressure of the kettle dropped to zero, and 70g La(NO 3 ) 3· 6H 2 A solution of O dissolved in 50 g of de...

Embodiment 2

[0047] 159.5 grams of phosphoric acid and 600 grams of deionized water were added to the gelling kettle and mixed and stirred evenly. After stirring for 30 minutes, 108.2 grams of hydrated aluminum oxide (72Wt.% Al 2 o 3 , the same below) stirring and mixing for 2 hours. Then, add 56.6 grams of tetraethyl orthosilicate (chemically pure), continue to stir and mix for 1 hour, then join the mixture of 18 grams of diethylamine and 48.7 grams of diisopropylamine in the above-mentioned gel-forming kettle, fully stir for 2 hours, and prepare To form a reaction mixture, 12 g of SAPO-41 was added as a seed crystal. The mixture was packed into a stainless steel crystallization kettle, stirred and crystallized at 120°C and autogenous pressure for 2 hours, and then cooled to zero pressure in the kettle, and 18.9g of Mn(NO 3 ) 2 (50% solution), uniformly stirred, the molar composition of this reaction mixture is: aR 2 :Al 2 o 3 :bP 2 o 5 : cSiO 2 :dMnO:eH 2 O, where a=0.9, b=0.9,...

Embodiment 3

[0051] Add 124 grams of phosphoric acid and 627.5 grams of deionized water into the gelling tank and mix and stir evenly. After stirring for 30 minutes, add 108.2 grams of it and stir and mix for 2 hours. Then, 138 grams of di-n-propylamine were added to the above-mentioned gelling still, and after stirring and mixing for 1 hour, 9.7 grams of fuming silica gel was added, and the reaction mixture was fully stirred for 2 hours, and 3 grams of SAPO- 41 as a seed crystal. Seal the mixture into a stainless steel crystallization kettle, stir and crystallize at 175°C and autogenous pressure for 20 hours, then cool down until the pressure of the kettle drops to zero, and add 68.9g of ZrOC1.8H 2 O is dissolved in the solution of 40g water, stirs for half an hour, the molar composition of this reaction mixture is: aR 2 :Al 2 o 3 :bP 2 o 5 : cSiO 2 :dZrO 2 :eH 2O, where a=1.8, b=0.7, c=0.15, d=0.3, e=51, heated up to 175° C. and kept at autogenous pressure for 28 hours. Then the...

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Abstract

The invention relates to a metal aluminum-silicon phosphate molecular sieve MeAPSO-41; the water-free chemical formula of the molecular sieve is nMe(SixAlyPz)O2, wherein, n is the mole number of the metal corresponding to the (SixAlyPz)O2 per mole, and x, y and z respectively represent the molar fraction of silicon atom, aluminum atom and phosphorous atom, and n is equal to 0.001 to 0.60, x is equal to 0.001 to 0.60, y is equal to0.001 to 0.70, z is equal to 0.001 to 0.70, and x plus y plus z is equal to 1. The MeAPSO-41 molecular sieve has good water heating stability, and can be used as the ion exchanging agent and the absorption agent, and also can be used for catalyzing the transforming reaction of the hydrocarbon. The molecular sieve is synthesized in the method: aluminum source, silicon source, phosphorous source and the template agent are mixed to gel; AFO structural molecular sieve is adopted as the inoculating crystal; the mixture is heated in the water and crystallized more than one hour at the temperature of 110 to 250 DEG C; during the crystallization process, the mixture is added with metal oxide to produce the reaction compound with the mole compositions of aR2:Al2O3:bP2O5:cSiO2:dMeOx:eH2O, wherein, a is equal to 0.05 to 2.5, b is equal to 0.1 to 2.0, c is equal to 0.01 to 1.5, d is equal to 0.01 to 1.0 and e is equal to 5 to 150; after the crystallization is completed, the product is recycled. The method has simple flow procedures, consumes less template and has low cost.

Description

technical field [0001] The invention relates to a molecular sieve and a synthesis method thereof, in particular to a metallosilicoaluminophosphate molecular sieve with an AFO structure and a synthesis method thereof. Background technique [0002] Following the aluminum silicate molecular sieve, US 4310440 disclosed a new generation of molecular sieve aluminum phosphate molecular sieve in the early eighties. Electroneutral, so there is no cation exchange performance and catalytic reaction performance. 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 constant is Its one-dimensional ten-membered ring channel is The structure of calculated AlPO4-41: A newframework topology containing one-dimensional 10-ring pores (Zeolites, 1994, volume 14, pages 523-528), the main diffraction peak data in its typical XRD spectrum are shown in Tabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/04B01J29/85
Inventor 李黎声张凤美舒兴田王卫东秦凤明
Owner CHINA PETROLEUM & CHEM CORP
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