Confined vortex flow reactor and application thereof to preparation process of Me-SAPO-34 molecular sieve

A reactor and confinement technology, which is applied in the field of chemical reaction preparation technology, can solve the problems of limiting the catalytic performance of materials, the particle size of molecular sieves and the influence of uniform dispersion performance, etc.

Active Publication Date: 2015-02-18
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These factors lead to the influence of the particle size and uniform dispersion performance of the prepared molecular sieve, which limits the catalytic performance of the material

Method used

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  • Confined vortex flow reactor and application thereof to preparation process of Me-SAPO-34 molecular sieve
  • Confined vortex flow reactor and application thereof to preparation process of Me-SAPO-34 molecular sieve
  • Confined vortex flow reactor and application thereof to preparation process of Me-SAPO-34 molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1It is a schematic diagram of a preferred embodiment of the confinement cyclone reactor created by the present invention, including a casing (1), internal teeth (6) and external teeth (5), the casing (1) is fixed on the base (14), and the The internal teeth (6) are fixed on the rotating shaft (15), the external teeth (5) are arranged on the periphery of the internal teeth (6), and the external teeth (5) are fixed on the bottom surface of the cover (2), so that The outer teeth (5) are close to the inner wall of the casing (1), the inner teeth (6) and the outer teeth (5) form a multi-stage reaction channel (12), and a liquid distributor (4) is fixed above the inner teeth (6) ), the liquid distributor (4) top corresponds to the liquid outlet of the feed delivery pipe (8) of the feed device, and the bottom of the multi-stage reaction channel (12) communicates with the discharge channel (13), and the rotating shaft ( 15) Pass through the discharge passage (13...

Embodiment 2

[0056] Such as Figure 5 It is a schematic diagram of a preferred embodiment of the confinement cyclone reactor created by the present invention. The difference from Example 1 is that the liquid distributor (4), such as Figure 6 Shown, be the disk that has 3 blade-type protrusions, and described blade-type protrusion is a triangular prism; In the discharge channel (13) below is as Figure 7 The discharge rotary impeller (7) shown has 3 gradually closed arc-shaped blades, which are semi-open; the cone angles of the upper, middle, and lower stages are 70°, 80°, and 82° successively, and the upper stage The diameter of the bottom surface of the circular platform is 2mm smaller than the diameter of the top surface of the intermediate circular platform, and the area of ​​the bottom surface of the intermediate circular platform is equal to the area of ​​the top surface of the lower circular platform. The space angle is 85°; corresponding to the three-stage circular frustum of the ...

Embodiment 3

[0060] The CoNi-SAPO-34 molecular sieve that adopts the confinement cyclone reactor of embodiment 1 to prepare bimetallic modification, its concrete steps are:

[0061] Water glass and phosphoric acid are formulated into a mixed aqueous solution A with a molar ratio of 3, wherein [SiO 2 ]=2.0mol / L; Pseudoboehmite, cobalt nitrate, nickel nitrate and tetraethylammonium hydroxide are made into the mixed aqueous solution B that molar ratio is 2:1:1:5, wherein [Co 2+ ]=[Ni 2+ ]=0.4mol / L; Two solutions A and B are added to the reactor for mixed reaction through two feed delivery pipes (8) above the reactor respectively; the multistage reaction channel (12) width range is adjusted to be 50-320 μm , the rotating speed of inner tooth (6) is 7000 rpm, and the flow rate of the mixed liquid in the discharge conveying pipe (10) is 1400kg / h. After aging the obtained mixture at room temperature for 3 hours, it was grown under autogenous pressure hydrothermal conditions at 180°C for 60 hour...

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Abstract

The invention inventively provides a confined vortex flow reactor and application thereof to a preparation process of a Me-SAPO-34 molecular sieve. The confined vortex flow reactor comprises a multi-stage reaction channel with the shape similar to an apron, wherein the width of the multi-stage reaction channel decreases continuously or in a stepping way from the top to the bottom; two side surfaces forming the multi-stage reaction channel can move relatively. When the confined vortex flow reactor implements forcible mixing of particles in a molecular level, the time scale is reduced to a millisecond level, so that the Me-SAPO-34 molecular sieve structure with a more regular structure, a smaller size and narrower particle size distribution can be prepared; the confined vortex flow reactor is especially applicable to needs of industrial production of a catalyst.

Description

technical field [0001] The invention belongs to the field of chemical reaction preparation process, relates to a chemical reaction process equipment, in particular to a confinement cyclone reactor for catalytic industry, and is especially suitable for the preparation of modified Me-SAPO-34 molecular sieve. Background technique [0002] Most chemical reactions go through two stages: nucleation and growth. Nucleation is a process in which atomic groups from different parent phases are piled together in a certain way under certain conditions to form a tiny crystalline core of a new phase. The nucleation process can generally be divided into two types: uniform nucleation and non-uniform nucleation. The size, quantity and distribution of crystal nuclei during the nucleation process have a direct impact on the structure, yield, properties and quality of the final reaction product. With the development of industrialization, the size and performance requirements of chemical product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18C01B37/08C01B39/54
CPCB01J19/18B01J2219/00018C01B37/08C01B39/54C01P2002/74C01P2004/03C01P2004/62
Inventor 陈涛魏浩然孙顺平李晓芳李林石晶陆峰
Owner CHINA TIANCHEN ENG
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