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Preparation method of high-performance SSZ-13 aggregate

An agglomerate and high-performance technology, applied in the field of catalysis, can solve the problems of low copper salt usage rate and general low-temperature catalytic performance, and achieve the effects of improved catalytic performance, expanded conversion rate, and enhanced copper coating ability

Active Publication Date: 2022-02-11
TIANJIN PASSION ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular sieve synthesized by this method has low copper salt usage rate and general low-temperature catalytic performance.

Method used

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  • Preparation method of high-performance SSZ-13 aggregate
  • Preparation method of high-performance SSZ-13 aggregate
  • Preparation method of high-performance SSZ-13 aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step S110:

[0047] Add deionized water, aluminum sulfate (content 97%), potassium hydroxide (content 98%), N,N,N-trimethyladamantane ammonium hydroxide (content 25%), silica sol to a 250ml flask at room temperature (content 30.1%), seed crystals, the mass ratio is 7.73:1.00:0.956:2.615:20.498:0.005. Stir at 60°C for 2 hours to prepare gel. The 80% gel was transferred into a homogeneous crystallization kettle, placed in an oven, and reacted at 160° C. for 7 hours to obtain a pre-crystallized product.

[0048] Step S120:

[0049]The pre-crystallized product slurry was put into a grinding machine for grinding for 10 hours, transferred to a homogeneous crystallization kettle, and the gel solution prepared in step S110 was added. The mass ratio of the gel and the pre-crystallized product slurry grinding solution was 0.1:1. P123 was added, and the molar ratio of P123 to silicon in the system was 0.05:1. The reaction was carried out at 180°C for 20h.

[0050] Step S120:

...

Embodiment 2

[0064] Step S110:

[0065] Add deionized water, aluminum sulfate (content 97%), potassium hydroxide (content 98%), N,N,N-trimethyladamantane ammonium hydroxide (content 25%), silica sol to a 250ml flask at room temperature (content 30.1%), seed crystals, the mass ratio is 7.74:1.00:1.244:2.615:20.247:0.005. Stir at 60°C for 2 hours to prepare gel. The 80% gel was transferred into a homogeneous crystallization kettle, placed in an oven, and reacted at 160° C. for 7 hours to obtain a pre-crystallized product.

[0066] Step S120:

[0067] The pre-crystallized product slurry was put into a grinder for grinding for 10 hours, transferred to a homogeneous crystallization kettle, and the gel solution prepared in step S110 was added. The mass ratio of the gel and the crystallization product slurry grinding solution was 0.15:1. P123 was added, and the molar ratio of P123 to silicon in the system was 0.05:1. The reaction was carried out at 175°C for 20h.

[0068] Step S130:

[0069] ...

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Abstract

The invention discloses a preparation method of a high-performance SSZ-13 aggregate. According to the method, N, N, N-trimethyl adamantane ammonium hydroxide is adopted as an organic template agent, an SZZ-13 product is subjected to dynamic crystallization hydrothermal synthesis, and after a mixed solution is ground, gel and a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) are added for secondary crystallization hydrothermal synthesis of the SZZ-13 aggregate. The SCR catalytic performance of the secondarily synthesized SZZ-13 aggregate sample after copper coating is greatly improved.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a preparation method of a high-performance SSZ-13 aggregate. Background technique [0002] In 1985, American chemist Zones used N,N,N-trimethyladamantane ammonium hydroxide (TMADaOH) as a template for the first time to obtain SSZ-13 molecular sieve by hydrothermal synthesis. SSZ-13 molecular sieve belongs to the same family as the silica-alumina chabazite, and has a CHA topology. It is often necessary to add an organic template during the synthesis process, and the silica-alumina ratio is higher than that of chabazite. SSZ-13 molecular sieve is based on SiO4 and AlO4 tetrahedron, which are arranged in an orderly manner through the connection of oxygen atoms into a crystal structure with eight-membered ring channels and three-dimensional intersecting channels. SSZ-13 molecular sieve has uniform pore channels, and the pore channel size is The specific surface area can reach 70...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J37/00B01J37/02B01J37/03B01J37/08B01J37/30C01B39/04B01D53/86B01D53/56B01D53/58
CPCB01J29/763B01J37/036B01J37/0036B01J37/30B01J37/0203B01J37/082B01D53/8628B01D53/8634C01B39/04B01J2229/186B01D2257/404B01D2257/406B01D2258/01C01P2002/72C01P2004/03
Inventor 梁珂殷华周琦龙江湘
Owner TIANJIN PASSION ADVANCED MATERIAL TECH CO LTD