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Synthesis method of SSZ-13 zeolite

A synthesis method and zeolite technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of toxicity, environmental damage, high price, etc., and achieve the effect of low toxicity, low price, and wide range of silicon-aluminum ratio

Active Publication Date: 2017-07-28
FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

And currently used N,N,N-trimethyladamantyl ammonium, N,N-dimethyl-N ， -Ethylcyclohexylammonium or N,N-dimethyl-N ， -Ethylcyclohexylammonium, benzyltrimethylammonium, tetraethylenepentamine, purine, 1-adamantanamine, choline, etc., their prices are generally high, and some have certain toxicity and damage the environment

Method used

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  • Synthesis method of SSZ-13 zeolite
  • Synthesis method of SSZ-13 zeolite
  • Synthesis method of SSZ-13 zeolite

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Embodiment Construction

[0027] The following ratio is an example to illustrate the preparation process of the present invention

[0028] raw material:

[0029] Silica sol: SiO 2 30.24%, Na 2 O 0.212%

[0030] Aluminum sulfate:Al 2 (SO 4 ) 3 18H 2 o

[0031] NaOH

[0032] Herotropine

[0033] h 2 o

[0034] Reactant molar ratio: SAR=40; OH - / SiO 2 =0.8; R / SiO 2 =0.25;H 2 O / SiO 2 =22.5.

[0035]

[0036] According to this formula, the raw materials were weighed and mixed, stirred vigorously to form a colloid, and then placed in a stainless steel reactor with a capacity of 100ml for a hydrothermal reaction at 180°C for 60 hours to generate SSZ-13 zeolite crystals. The product was cooled, filtered, washed with deionized water, Filter and dry to obtain the target product.

[0037] The following table lists the reactant molar ratio, reaction temperature and time, the SAR of the product, and its BET surface area, micropore surface area, total pore volume, micropore volume, average por...

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Abstract

The present invention belongs to the technical field of zeolite molecular sieves, and in particular relates to a synthesis method of SSZ-13 zeolite. The method comprises the steps: performing hydrothermal reaction on a mixture of alkali metal or an alkaline earth metal source, an oxide source of a trivalent element, an oxide source of a tetravalent element, water and a structural guiding agent, to obtain an SSZ-13 zeolite crystal, cooling, filtering, and washing with water to obtain SSZ-13 zeolite. The structural guiding agent used in the invention has the advantages of low toxicity, low cost, wide range of Si / Al ratio of a synthetic product, low activation temperature, and easiness in industrialization compared with other known structural guiding agents. The SSZ-13 zeolite prepared in the invention shows a high catalytic conversion rate in catalytic removal reaction of nitrogen oxides when being used as a catalyst.

Description

technical field [0001] The invention belongs to the technical field of zeolite molecular sieves, and in particular relates to a synthesis method of SSZ-13 zeolite. Background technique [0002] The framework of SSZ-13 zeolite molecular sieve belongs to the CHA structure type, and [SiO4] and [AlO4] tetrahedral co-oxygen links form four oxygen rings and six oxygen ring primary structure d6r cages (see figure 1 (1)), and a cha cage constructed by a tetraoxo ring and an octaoxo ring (see figure 1 (2)), the d6r cage is interconnected with the cha cage (see figure 1 (3)), and further orderly link into a channel structure with an opening pore size of 0.38x0.38 nanometers (see figure 1 (4)). The CHA structure type zeolite was previously found in natural minerals, commonly known as Chabasite, a SiO 2 / Al 2 o 3 Ca-type chabazite with a molar ratio (SAR) of 4 (Nature, 181, 1794-1796, 1958). Due to the small reserves of this natural product, many impurities, too low SAR, and low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04
CPCC01B39/04C01P2002/72C01P2004/03C01P2006/12C01P2006/14C01P2006/16
Inventor 龙英才濮鹏翔郭娟林德昌侯楚楚
Owner FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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