Chabazite-type zeolite and process for producing the same

Patent metadata

Field	Value
Publication number	US-10029247-B2
Application number	US-200913139591-A
Country	US
Kind code	B2
Filing date	Dec 21, 2009
Priority date	Dec 22, 2008
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A subject for the invention is to provide a chabazite-type zeolite that is expected to have durability and thermal resistance, which are practical properties required of catalyst supports and adsorbent bases, and that has profitability. A chabazite-type zeolite having an SiO 2 /Al 2 O 3 molar ratio of 15-50 and an average particle diameter size of 1.5 μm or more has high durability and high thermal resistance. Such a chabazite-type zeolite can be produced by crystallizing a starting-material composition in which the molar ratios of a structure-directing agent and water to SiO 2 satisfy

0.05≤(structure-directing agent)/SiO 2 <0.13 and

5≤H 2 O/SiO 2 <30,

in the presence of at least one kind of alkali metal ions selected from the group consisting of K, Rb, and Cs. The structure-directing agent preferably is an N,N,N-trimethyladamantaneammonium salt.

First claim

The invention claimed is:

1. A process for producing a chabazite-type zeolite having an SiO 2 /Al 2 O 3 molar ratio of 15-50 and an average crystal particle diameter of 1.5 μm or more, comprising crystallizing a starting-material composition in which the molar ratios of a structure-directing agent and water to SiO 2 satisfy
0.05≤(structure-directing agent)/SiO 2 <0.13 and

5≤H 2 O/SiO 2 <30

in the presence of at least one alkali metal ion selected from the group consisting of K, Rb, and Cs, and wherein the structure-directing agent comprises at least one member selected from the group consisting of the hydroxides, halides, carbonates, methyl carbonates, and sulfates which each include an N,N,N-trialkyladamantylammonium as a cation and of the hydroxides, halides, carbonates, methyl carbonate salts, and sulfates which each include an N,N,N-trimethylbenzylammonium ion, an N-alkyl-3-quinuclidinol ion, or an N,N,N-trialkyl-exo-aminonorbornane as a cation.

2. The process for producing the chabazite-type zeolite as claimed in claim 1 , wherein the structure-directing agent comprises at least one member selected from the group consisting of N,N,N-trimethyladamantylammonium hydroxide, N,N,N-trimethyladamantylammonium halides, N,N,N-trimethyladamantylammonium carbonate, N,N,N-trimethyladamantylammonium methyl carbonate, and N,N,N-trimethyladamantylammonium sulfate.

3. The process for producing the chabazite-type zeolite as claimed in claim 1 , wherein a starting-material composition in which the molar ratio of the water to SiO 2 satisfies
5≤H 2 O/SiO 2 ≤18.

4. The process for producing the chabazite-type zeolite as claimed in claim 1 , wherein the starting-material is crystallized in the presence of at least K.

5. The process for producing the chabazite-type zeolite as claimed in claim 1 , wherein said crystallization further comprises crystallization of the starting-material in the presence of Na.

6. A process for producing a chabazite-type zeolite having an SiO 2 /Al 2 O 3 molar ratio of 15-50 and an average crystal particle diameter of 1.5 um or more, comprising crystallizing a starting-material composition in which the molar ratios of a structure-directing agent and water to SiO 2 and the molar ratio of SiO 2 /Al 2 O 3 satisfy
0.05≤(structure-directing agent)/SiO 2 <0.13 and

5≤H 2 O/SiO 2 <30

16≤SiO 2 /Al 2 O 3 ≤100

in the presence of at least one alkali metal ion selected from the group consisting of K, Rb, and Cs, and wherein the structure-directing agent comprises at least one member selected from the group consisting of the hydroxides, halides, carbonates, methyl carbonates, and sulfates which each include an N,N,N-trialkyladamantylammonium as a cation and of the hydroxides, halides, carbonates, methyl carbonate salts, and sulfates which each include an N,N,N-trimethylbenzylammonium ion, an N-alkyl-3-quinuclidinol ion, or an N,N,N-trialkyl-exo-aminonorbornane as a cation.

Assignees

• Ariga Ko
• Aoyama Hidekazu
• Tosoh Corp

Inventors

• Ariga Ko
• Aoyama Hidekazu

Classifications

• B01J29/7015

  CHA-type, e.g. Chabazite, LZ-218 · CPC title

• B01J39/14 Primary

  Base exchange silicates, e.g. zeolites · CPC title

• B01D2253/108

  Zeolites · CPC title

• B01D2253/1085

  characterized by a silicon-aluminium ratio · CPC title

• B01D2255/50

  Zeolites · CPC title