# US 11,027,265 B2 · SCR catalyst

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- Number: US 11,027,265 B2
- Document ID: US11027265B2
- Status: Granted
- Kind: B2
- Application number: 16/705,476
- Filed: 2019-12-06
- Published: 2020-04-09
- Granted: 2021-06-08
- Earliest claimed: 2013-12-03
- Assignees: Johnson Matthey Public Limited Company
- Applicants: Johnson Matthey Public Limited Company
- Inventors: Alejandra Rivas-Cardona; Joseph Michael Fedeyko; Hai-Ying Chen
- Web page: https://patentgrep.com/patent/US11027265B2

## CPC

- B01J 29/763: {CHA-type, e.g. Chabazite, LZ-218}
- B01D 53/56: Nitrogen oxides (B01D53/60 takes precedence)
- B01D 53/565: {by treating the gases with solids}
- B01D 53/8628: {Processes characterised by a specific catalyst}
- B01D 53/9413: {Processes characterised by a specific catalyst}
- B01D 53/9418: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
- B01J 37/0009: {Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst}
- B01J 37/0201: {Impregnation}
- B01J 37/0225: {of metal substrates}
- B01J 37/0246: {Coatings comprising a zeolite}
- B01J 37/031: {Precipitation}
- B01J 37/035: {Precipitation on carriers}
- B01J 37/036: {to form a gel or a cogel}
- B01J 37/10: in the presence of water, e.g. steam
- B01J 37/30: Ion-exchange
- C01B 39/04: using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound
- C01B 39/06: Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements {, i.e. by direct or secondary synthesis}
- C01B 39/46: Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)}
- C01B 39/48: using at least one organic template directing agent
- B01D 2251/2062: Ammonia
- B01D 2255/20761: Copper
- B01D 2255/50: Zeolites
- B01D 2255/65: Catalysts not containing noble metals
- B01D 2255/915: Catalyst supported on particulate filters
- B01D 2255/9155: Wall flow filters
- B01D 2258/012: Diesel engines and lean burn gasoline engines
- B01J 35/57: Honeycombs
- B01J 2229/16: to increase the Si/Al ratio; Dealumination
- B01J 2229/183: in framework positions
- B01J 2229/186: not in framework positions
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A copper-CHA zeolite catalyst for SCR of NOx is disclosed.

## Claims

### Claim 1

A one-pot synthesis method for making a catalyst composition comprising a zeolite having a CHA framework, a molar silica-to-alumina ratio (SAR) of 45 to 85, and an atomic copper-to-aluminium ratio of at least 1.25, which method comprising forming a reaction mixture containing a source of silica, a source of alumina, a first CHA framework organic templating agent in the form of a copper metal-amine, a second distinct organic CHA templating agent, and seed crystals; heating the reaction mixture to facilitate crystallization and precipitation of the crystals of the catalyst composition; and collecting, washing and drying the crystals.

### Claim 2 (depends on 1)

The method of claim 1, wherein the copper metal-amine is Cu-tetraethylenepentamine (Cu-TEPA) and the second distinct organic CHA templating agent is N,N,N-dimethylethylcyclohexylammonium (DMECHA).

### Claim 3 (depends on 1)

The method of claim 1, wherein the reaction mixture is free from fluorine.