# US 2014/0193327 A1 · Low phosphorus chabazites > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193327 A1 - Document ID: US20140193327A1 - Status: Published application - Kind: A1 - Application number: 14/236,734 - Filed: 2012-07-26 - Published: 2014-07-10 - Earliest claimed: 2011-07-27 - Assignees: Johnson Matthey Public Limited Company - Inventors: John L. Casci; Hai-Ying Chen; Joseph Michael Fedeyko; Jillian Elaine Collier; Raj Rao Rajaram; David Thompsett - Web page: https://patentgrep.com/patent/US20140193327A1 ## CPC - B01J 29/763: {CHA-type, e.g. Chabazite, LZ-218} - B01D 53/8628: {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 29/7015: {CHA-type, e.g. Chabazite, LZ-218} - B01J 29/85: Silicoaluminophosphates [SAPO compounds] - B01J 29/88: Ferrosilicates; Ferroaluminosilicates {(B01J29/005 takes precedence)} - B01J 37/28: Phosphorising - C01B 39/04: using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound - C01B 39/10: the replacing atoms being {at least} phosphorus atoms - C01B 39/54: Phosphates, e.g. APO or SAPO compounds - B01D 2251/2062: Ammonia - B01D 2251/2067: Urea - B01D 2255/20738: Iron - B01D 2255/20761: Copper - B01D 2255/50: Zeolites - B01D 2255/707: Additives or dopants - B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths - B01J 37/0246: {Coatings comprising a zeolite} - B01J 2229/183: in framework positions - B01J 2229/186: not in framework positions - Y02T 10/12: Improving ICE efficiencies - 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} - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A catalyst composition is provided having a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The catalyst composition is capable of NOx conversion at elevated temperatures. A catalytically active washcoat includes such catalyst compositions and one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. Methods of reducing NOx employing the catalyst compositions are also provided. ## Claims ### Claim 1 A composition comprising a crystalline structure, wherein at least a portion of the crystalline structure is a molecular sieve having a chabazite framework consisting of thirty-six T-atoms selected from the group consisting of silicon, aluminum, and phosphorus; wherein said molecular sieve comprises about 0.05 to about 5.0 mole percent of framework phosphorus based on the total moles of framework silicon, aluminum, and phosphorus in said molecular sieve; and wherein said molecular sieve has a silica-to-alumina mole ratio of at least about 10. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The composition of claim 1 wherein said molecular sieve comprises about 0.05 to about 1.0 mole percent of framework phosphorus based on the total moles of framework silicon, aluminum, and phosphorus in said molecular sieve. ### Claim 4 (canceled) ### Claim 5 (canceled) ### Claim 6 (canceled) ### Claim 7 (depends on 1) The composition of claim 1 wherein said molecular sieve comprises about 80 to about 90 mole percent of said framework Si and about 10 to about 20 combined mole percent of said framework Al and P, based on the total moles of said framework Si, Al, and P in said molecular sieve. ### Claim 8 (canceled) ### Claim 9 (depends on 1) The composition of claim 1 wherein said framework phosphorus is present as —PO2 moieties, said framework silicon in present as —SiO2 moieties, and framework aluminum is present as —AlO2 moieties. ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 (depends on 1) The composition of claim 1 wherein said molecular sieve material further comprises about 0.025 to about 5 w/w % of extra-framework copper on an anhydrous molecular sieve basis. ### Claim 13 (depends on 1) The composition of claim 1 wherein said molecular sieve material further comprises about 0.025 to about 5 w/w % of extra-framework iron on an anhydrous molecular sieve basis. ### Claim 14 (canceled) ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (canceled) ### Claim 18 (canceled) ### Claim 19 A composition comprising a molecular sieve material having a CHA framework, wherein the framework consists of periodic building units having 36 interlinked T-atoms selected from the group consisting of aluminum, silicon, and phosphorus, and wherein said molecular sieve material has a mean phosphorus concentration of about 0.5 to about 1.5 atoms per periodic building unit. ### Claim 20 (depends on 19) The composition of claim 19 wherein said mean phosphorus concentration is about 1.0 to about 1.5 atoms per periodic building unit. ### Claim 21 (canceled) ### Claim 22 (depends on 19) The composition of claim 19 wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10. ### Claim 23 (depends on 19) The composition of claim 19 wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 1. ### Claim 24 (depends on 19) The composition of claim 19 wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 10. ### Claim 25 (depends on 19) The composition of claim 19 wherein said molecular sieve material has a silica-to-alumina ratio of at least about 10 and an Al:P ratio of greater than about 100. ### Claim 26 (depends on 19) The composition of claim 19 wherein said phosphorus is connected to at least a portion of said aluminum via oxygen bridges. ### Claim 27 (depends on 19) The composition of claim 19 wherein said molecular sieve material further comprises a non-aluminum base metal. ### Claim 28 (depends on 27) The composition of claim 27 wherein said non-aluminum base metal is ion-exchanged. ### Claim 29 (depends on 28) The composition of claim 28 wherein said non-aluminum base metal is copper. ### Claim 30 (depends on 28) The composition of claim 28 wherein said non-aluminum base metal is iron. ### Claim 31 (canceled) ### Claim 32 (canceled) ### Claim 33 (canceled) ### Claim 34 (canceled) ### Claim 35 (depends on 1) A method for reducing NOx in an exhaust gas comprising contacting the gas with a catalyst for a time and temperature sufficient to reduce the level of NOx compounds in the gas, wherein the catalyst is a catalyst comprising a composition according to claim 1. ### Claim 36 (canceled)