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Sapo-35 molecular sieve and its preparation method and application

A kind of SAPO-35, molecular sieve technology, applied in the field of molecular sieve, to achieve the effect of good application prospect and good performance

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is no report on the use of 1-methyl-4-piperidinemethanol as a template in the synthesis of SAPO-35 molecular sieves

Method used

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  • Sapo-35 molecular sieve and its preparation method and application
  • Sapo-35 molecular sieve and its preparation method and application
  • Sapo-35 molecular sieve and its preparation method and application

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preparation example Construction

[0047] Second aspect, the present invention provides a kind of preparation method of SAPO-35 molecular sieve, this method comprises:

[0048] (1) provide a kind of mixed solution, described mixed solution contains phosphorus source, aluminum source, silicon source, templating agent R and water, and described phosphorus source uses P 2 o 5 In terms of the aluminum source as Al 2 o 3 In terms of, the silicon source is SiO 2 In total, the molar ratio of phosphorus source, aluminum source, silicon source, templating agent R and water is 0.8-1.2:1:0.1-1:1-5:10-100, preferably 0.9-1.1:1:0.15-0.8: 1-4: 15-80;

[0049] (2) subjecting the mixed solution to hydrothermal crystallization;

[0050] (3) performing solid-liquid separation on the mixture obtained by hydrothermal crystallization, drying and optionally roasting the obtained solid phase;

[0051] Wherein, the template R is 1-methyl-4-piperidinemethanol.

[0052] In a third aspect, the present invention provides a preparat...

Embodiment 1

[0087] 4.91 g of pseudoboehmite (Al 2 o 3 Mass fraction 83%) adds in the beaker, adds 33.26 gram deionized waters, stirs and mixes to evenly, adds 9.22 gram orthophosphoric acid (H 3 PO 4 mass fraction 85%), fully stirred at 70°C, and aged for 15 hours to prepare mixture A. The mixture A was poured into a tray, and dried at 80° C. for 22 hours to obtain a phosphoraluminum xerogel.

[0088] Get 7.64 grams of obtained phosphorus-aluminum dry glue (solid content 79.8 mass %) and add in the polytetrafluoroethylene liner, add 0.48 grams of solid silica gel (SiO 2 Mass fraction 93%), 7.22 gram deionized water, 6.66 gram 1-methyl-4-piperidinemethanol (C 7 h 15 NO mass fraction 97%), stir evenly, wherein the adding molar ratio of each component is: P 2 o 5 / Al 2 o 3 =1.0, SiO 2 / Al 2 o 3 =0.3, R / Al 2 o 3 =2.0,H 2 O / Al 2 o 3 =20.

[0089] Cover the polytetrafluoroethylene liner with the above reaction mixture, put it into a stainless steel autoclave and seal it, place...

Embodiment 2

[0093] 4.91 g of pseudoboehmite (Al 2 o 3 Mass fraction 83%) adds in the beaker, adds 30.18 gram deionized waters, stirs and mixes to evenly, adds 9.22 gram orthophosphoric acid (H 3 PO 4 mass fraction 85%), fully stirred at 60°C, and aged for 15 hours to prepare mixture A. The mixture A was poured into a tray, and dried at 80° C. for 24 hours to obtain a phosphoraluminum xerogel.

[0094] Get 7.68 grams of obtained phosphorus-aluminum dry glue (solid content 79.4 mass %) and add in the polytetrafluoroethylene liner, add 2.11 grams of ethyl orthosilicate (SiO 2 Mass fraction>28%), 11.70 grams of deionized water, 6.66 grams of 1-methyl-4-piperidinemethanol (C 7 h 15 NO mass fraction 97%), stir evenly, wherein the adding molar ratio of each component is: P 2 o 5 / Al 2 o 3 =1.0, SiO 2 / Al 2 o 3 =0.4, R / Al 2 o 3 =2.0,H 2 O / Al 2 o 3 =30.

[0095] Cover the polytetrafluoroethylene liner with the above reaction mixture, put it into a stainless steel autoclave and se...

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Abstract

The invention relates to the field of molecular sieves, and discloses a SAPO-35 molecular sieve and its preparation method and application. The SAPO-35 molecular sieve has the following anhydrous chemical composition: mR (Si x al y P z )O 2 , wherein, R is 1-methyl-4-piperidinemethanol, and m is per mole (Si x al y P z )O 2 The molar number of corresponding 1-methyl-4-piperidine methanol, m=0.11-0.26; x, y, z represent respectively the molar fraction of Si, Al, P with the total molar number of Si, Al and P, wherein , x=0.01-0.25, y=0.40-0.55, z=0.25-0.52, and x+y+z=1. The SAPO‑35 molecular sieve of the present invention can be used for gas adsorption and separation, and can also be used for the conversion of oxygen-containing compounds to produce low-carbon olefins, can show good performance, and has good application prospects.

Description

technical field [0001] The invention relates to the field of molecular sieves, in particular to a SAPO-35 molecular sieve and its preparation method and application. Background technique [0002] Since 1984, United Carbide Corporation (UCC) developed a series of silicon-phosphor-aluminum molecular sieves SAPO-n (n represents the structural model), because SAPO molecular sieves have mild and adjustable acidity and different pore structures, silicon-phosphorus-aluminum Molecular sieves are widely used in the fields of gas adsorption separation, catalysis and ion exchange. As one of the silicon phosphorus aluminum molecular sieves, the topological structure of SAPO-35 molecular sieve is intercalated chabazite type (LEV), the space group is R-3m, and it has a two-dimensional eight-membered ring channel with a pore size of 0.36nm×0.48 nm, belonging to small-pore molecular sieves. [0003] SAPO-35 molecular sieves are generally synthesized by hydrothermal synthesis or solvotherm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B37/08C01B39/54B01J20/18B01J29/85C07C1/20C07C11/04C07C11/06
CPCB01J20/18B01J29/85C01B37/08C01B39/54C01P2002/72C01P2004/03C07C1/20C07C2529/85C07C11/04C07C11/06Y02P20/52Y02P30/20Y02P30/40
Inventor 梁世航忻睦迪王永睿慕旭宏舒兴田
Owner CHINA PETROLEUM & CHEM CORP