Aei zeolite containing phosphorus and production method therefor

Patent metadata

Field	Value
Publication number	US-2016144347-A1
Application number	US-201414903355-A
Country	US
Kind code	A1
Filing date	Jul 9, 2014
Priority date	Jul 10, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

Provided is AEI zeolite having a uniform acid strength of an appropriate degree. AEI zeolite comprising phosphorus, preferably AEI zeolite comprising phosphorus in the pores, and a method for producing AEI zeolite comprising a crystallization step of crystallizing a raw material mixture containing a tetraethylphosphonium cation.

First claim

1 . AEI zeolite comprising phosphorus.

2 . The AEI zeolite according to claim 1 , containing phosphorus in pores.

3 . The AEI zeolite according to claim 1 , wherein a molar ratio of phosphorus relative to framework metal is not less than 0.001 and not greater than 0.1.

4 . The AEI zeolite according to claim 1 , wherein a molar ratio of silica relative to alumina is not less than 10 and not greater than 35.

5 . The AEI zeolite according to claim 1 , comprising a transition metal.

6 . The AEI zeolite according to claim 5 , wherein the transition metal is at least any one of iron and copper.

7 . The AEI zeolite according to claim 5 , wherein a molar ratio of the transition metal relative to aluminum is not less than 0.1 and not greater than 0.5.

8 . A method for producing the AEI zeolite described in claim 1 , comprising a crystallization step of crystallizing a raw material mixture containing a tetraethylphosphonium cation and FAU crystalline aluminosilicate having a lattice constant of not less than 24.30 Å.

9 . The method for producing AEI zeolite according to claim 8 , wherein a compound containing a tetraethylphosphonium cation is at least one selected from the group consisting of tetraethylphosphonium hydroxide, tetraethylphosphonium bromide, and tetraethylphosphonium chloride.

10 . The method for producing AEI zeolite according to claim 8 , wherein the FAU crystalline aluminosilicate is Y zeolite.

11 . The method for producing AEI zeolite according to claim 8 , comprising a step of heat-treating AEI zeolite in a non-oxidizing environment.

12 . The method for producing AEI zeolite according to claim 11 , wherein the non-oxidizing environment is at least any one of a nitrogen environment and an environment containing from 1 to 10 volume % hydrogen.

13 . A catalyst comprising the AEI zeolite described in claim 1 .

14 . A nitrogen oxide reduction catalyst comprising the AEI zeolite described in claim 1 .

15 . A method for reducing nitrogen oxide comprising a step of using the AEI zeolite described in claim 1 .

Assignees

• Tosoh Corp
• Univ Hiroshima

Inventors

• Sano Tsuneji
• Sadakane Masahiro
• Takamitsu Yasuyuki

Classifications

• B01J2229/186

  not in framework positions · CPC title

• B01J29/85 Primary

  Silicoaluminophosphates [SAPO compounds] · CPC title

• C01B39/54 Primary

  Phosphates, e.g. APO or SAPO compounds · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01D53/8628

  Processes characterised by a specific catalyst · CPC title