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Multi-stage porous SAPO-11 molecular sieve and synthesis method and application thereof

A technique for the synthesis of SAPO-11, which is applied in the direction of molecular sieves and alkali-exchanged phosphates, including molecular sieve catalysts, molecular sieve characteristic silicoaluminophosphates, etc., can solve the problems such as the single channel structure of SAPO-11 molecular sieves, and achieve high crystallinity, The effect of reducing waste liquid discharge and improving catalytic performance

Active Publication Date: 2018-12-14
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Multi-stage porous SAPO-11 molecular sieve and synthesis method and application thereof
  • Multi-stage porous SAPO-11 molecular sieve and synthesis method and application thereof
  • Multi-stage porous SAPO-11 molecular sieve and synthesis method and application thereof

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 material was transferred to a 100ml polytetrafluoroethylene-lined stainless steel autoclave, and placed in 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 su...

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 material was transferred to a 100ml polytetrafluoroethylene-lined stainless steel autoclave, and placed in 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 a synthesis method and an application thereof. The preparation method at least includes the steps: crushing and mixing SAPO-11 molecular sieve raw powder with solid acid evenly, to obtain a mixture; and carrying out a reaction of the mixture for 2 h-12 h at the temperature of 20 DEG C-120 DEG C to obtain the multi-stage porousSAPO-11 molecular sieve. The SAPO-11 molecular sieve prepared by solid acid post-treatment of the SAPO-11 molecular sieve raw powder not only has an appropriate pore passage structure, namely a composite multi-stage pore passage, but also has high degree of crystallinity. In addition, the catalytic performance of the multi-stage porous SAPO-11 molecular sieve after pore passage adjustment is greatly improved. The method does not use water or other solvents in the process of treatment, reduces the discharge of waste liquid, has low cost of preparation, and has potential economic 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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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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