Zeolite SSZ-52x

Patent metadata

Field	Value
Publication number	US-10150676-B2
Application number	US-201615196598-A
Country	US
Kind code	B2
Filing date	Jun 29, 2016
Priority date	Jun 29, 2016
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

The present invention relates to new crystalline zeolite SSZ-52x prepared using a quaternary ammonium cation templating agent, for example, having the structure:

wherein X − is an anion which is not detrimental to the formation of the SSZ-52x. SSZ-52x is useful as a catalyst and shows improved durability, particularly with regard to NO x conversion.

First claim

What is claimed is:

1. A zeolite SSZ-52x having a mole ratio of 6-50 of an oxide selected from the group consisting of silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide and mixtures thereof, and exhibiting in the as synthesized form the XRD pattern of FIG. 4( a ) .

2. The zeolite SSZ-52x according to claim 1 , wherein the oxides comprise silicon oxide and aluminum oxide.

3. The zeolite SSZ-52x zeolite according to claim 1 , wherein said zeolite is in the hydrogen form.

4. The zeolite SSZ-52x according to claim 1 , having a composition, as synthesized and in the anhydrous state, in terms of mole ratios as follows:

YO 2 /W 2 O 3
 6-50

M 2/n /YO 2
0.1-0.5

Q/YO 2
0.01-0.08

wherein Y is silicon, germanium or a mixture thereof; W is aluminum, gallium, iron or mixtures thereof; M is an alkali metal cation, alkaline earth metal cation or mixtures thereof; n is the valence of M; and Q is a quaternary ammonium cation having the structure

where X− is an anion which is not detrimental to the formation of the zeolite.

5. The zeolite SSZ-52x according to claim 4 , wherein W is aluminum and Y is silicon.

Assignees

• Chevron Usa Inc

Inventors

• Davis Tracy

Classifications

• B01D53/9418

  for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas · CPC title

• C10G3/49

  containing crystalline aluminosilicates, e.g. molecular sieves · CPC title

• B01J29/70

  of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 · CPC title

• B01D2255/70

  Non-metallic catalysts, additives or dopants · CPC title

• B01D2255/202

  Alkali metals · CPC title