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A kind of multistage porous sapo-11 molecular sieve and its synthesis method and application

A SAPO-11, molecular sieve technology, applied in the direction of molecular sieve and alkali exchange phosphate, containing molecular sieve catalyst, molecular sieve characteristic silicoaluminophosphate, etc. The effect of low cost and reduced waste liquid discharge

Active Publication Date: 2021-11-30
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of multi-stage porous SAPO-11 molecular sieve and its synthetic method and application, for solving the problem that the prepared SAPO-11 molecular sieve channel structure of the prior art is single question

Method used

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  • A kind of multistage porous sapo-11 molecular sieve and its synthesis method and application
  • A kind of multistage porous sapo-11 molecular sieve and its synthesis method and application
  • A kind of multistage porous sapo-11 molecular sieve and its synthesis method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Weigh 10g laboratory synthetic SAPO-11 molecular sieve former powder (such as figure 1 is the XRD spectrum of the original powder, figure 2 It is the scanning electron microscope photograph of former powder) and 0.1g solid-phase oxalic acid, add in pulverizer and pulverize, make solid-state reactant mix uniformly. Then the raw materials were transferred to a 100ml polytetrafluoroethylene-lined stainless steel autoclave, put into an oven, and reacted at 100°C for 6h to obtain a multi-stage porous SAPO-11 molecular sieve.

[0043] Figure 4 It is the XRD spectrum of the product, it can be seen that the product is a typical AEL structure with good relative crystallinity

[0044] Figure 5 It is the SEM scanning electron microscope photo of the product. It can be seen that the product consists of spherical particles with a particle size of 6-10 μm accumulated by flake crystals. Compared with the original powder, there are a small amount of shedding crystals on the surfa...

Embodiment 2

[0046]Weigh 10 g of laboratory-synthesized SAPO-11 molecular sieve raw powder and 0.1 g of solid-phase oxalic acid, put them into a pulverizer and pulverize them, so that the solid-state reactants are evenly mixed. Then the raw material was transferred to a 100ml polytetrafluoroethylene-lined stainless steel autoclave, and placed in an oven, and reacted at 100°C for 12h to obtain a multi-stage porous SAPO-11 molecular sieve.

[0047] Figure 6 It is the XRD spectrum of the product, it can be seen that the product is a typical AEL structure with good crystallinity.

[0048] Figure 7 It is the SEM scanning electron microscope photo of the product, it can be seen that the product is composed of flaky crystals with a particle diameter of 6-10 μm spherical particles, and the surface is compared with that of Example 1. figure 2 More crystals are shed.

Embodiment 3

[0050] Weigh 10 g of laboratory-synthesized SAPO-11 molecular sieve raw powder and 0.15 g of solid oxalic acid, put them into a pulverizer and pulverize them, so that the solid reactants are evenly mixed. Then the raw materials were transferred to a 100ml polytetrafluoroethylene-lined stainless steel autoclave, put into an oven, and reacted at 100°C for 6h to obtain a multi-stage porous SAPO-11 molecular sieve.

[0051] Figure 8 It is the XRD spectrum of the product, it can be seen that the product is a typical AEL structure with good crystallinity.

[0052] Figure 9 It is the SEM scanning electron microscope photo of the product.

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Abstract

The invention provides a multi-stage porous SAPO-11 molecular sieve and its synthesis method and application. The preparation method at least includes: pulverizing and mixing the original SAPO-11 molecular sieve powder and solid acid to obtain a mixture, and placing the mixture at 20°C React at ~120°C for 2h to 12h to obtain a multi-level porous SAPO-11 molecular sieve. The SAPO-11 molecular sieve prepared by the SAPO-11 molecular sieve raw powder of the present invention not only has a suitable pore structure, that is, a composite multi-stage channel, but also has a high crystallinity; in addition, the multi-stage pore SAPO after channel adjustment The catalytic performance of ‑11 molecular sieve is greatly improved. The method does not use water or other solvents in the treatment process, reduces waste liquid discharge, has low preparation cost, and has potential economic value and social value.

Description

technical field [0001] The invention belongs to the field of synthesis of molecular sieves, and relates to a multi-level porous SAPO-11 molecular sieve and its synthesis method and application, in particular to a method for synthesizing a multi-level porous SAPO-11 molecular sieve with a suitable pore structure after solid acid post-treatment and Applications of molecular sieves. Background technique [0002] Molecular sieves have attracted widespread attention due to their excellent physical and chemical properties, adjustable acidity, high thermal stability, high hydrothermal stability and specific pore structure, making them widely used in the field of industrial catalysis. The bifunctional catalyst prepared by compounding noble metal / non-noble metal and molecular sieve carrier is applied in the lubricating oil preparation process, and can effectively improve the yield of lubricating oil base oil. Molecular sieves such as SAPO-11, SAPO-31, SAPO-34, ZSM-22, and ZSM-23 are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/54C01B37/08C07C9/16C07C5/27
CPCC01B37/08C01B39/54C01P2002/72C01P2004/03C01P2004/61C01P2006/12C01P2006/16C07C5/2775C07C2529/85C07C9/16
Inventor 陈新庆余淦刘子玉丘明煌杨承广孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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