# US 2018/0021764 A1 · Stabilized metal-exchanged sapo material

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- Number: US 2018/0021764 A1
- Document ID: US20180021764A1
- Status: Published application
- Kind: A1
- Application number: 15/720,567
- Filed: 2017-09-29
- Published: 2018-01-25
- Earliest claimed: 2013-03-13
- Assignees: BASF SE
- Applicants: BASF Corporation
- Inventors: Subramanian Prasad; Martin C. Wende; Jaya L. Mohanan
- Web page: https://patentgrep.com/patent/US20180021764A1

## CPC

- B01J 29/85: Silicoaluminophosphates [SAPO compounds]
- B01D 53/8625: {Nitrogen oxides}
- 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 29/7065: {CHA-type, e.g. Chabazite, LZ-218}
- B01J 29/763: {CHA-type, e.g. Chabazite, LZ-218}
- B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
- B01J 35/70: characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00)
- B01J 37/0246: {Coatings comprising a zeolite}
- B01D 2255/2065: Cerium
- B01D 2255/20738: Iron
- B01D 2255/20746: Cobalt
- B01D 2255/20753: Nickel
- B01D 2255/20761: Copper
- B01D 2255/50: Zeolites
- B01J 2229/183: in framework positions
- B01J 2229/186: not in framework positions
- B01J 2229/24: to stabilize the molecular sieve structure
- B01J 2229/30: After treatment, characterised by the means used
- B01J 2229/38: Base treatment
- B01J 2235/05: Nuclear magnetic resonance [NMR]
- B01J 2235/15: X-ray diffraction
- 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)

## Abstract

Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

## Claims

### Claim at position 1

1-16. (canceled)

### Claim 17

A process for stabilizing a selective catalytic reduction catalyst material comprising a SAPO material and an exchanged metal, the process comprising:
exposing the SAPO material to dry ammonia; and
ion exchanging the SAPO material with a metal salt to provide a stabilized SAPO material.

### Claim 18 (depends on 17)

The process of claim 17, wherein the metal of the metal salt is selected from the group consisting of Cu, Fe, Co, Ce and Ni.

### Claim 19 (depends on 18)

The process of claim 18, wherein the metal comprises copper.

### Claim 20 (depends on 19)

The process of claim 19, wherein the SAPO material comprises SAPO-34.

### Claim 21 (depends on 17)

The process of claim 17, wherein the stabilized SAPO material comprises a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites.

### Claim 22 (depends on 21)

The process according to claim 21, wherein the plurality of substitutional sites includes less than 5% Si(0Al) sites.

### Claim 23 (depends on 21)

The process according to claim 21, wherein the plurality of substitutional sites includes less than 1% Si(0Al) sites.

### Claim 24 (depends on 17)

The process according to claim 17, wherein the SAPO material has a structure type selected from the group consisting of AEI, AFT, AFX, CHA, EAB, ERI, KFI, LEV, SAS, SAT, and SAV.

### Claim 25 (depends on 24)

The process according to claim 24, wherein the SAPO material has the CHA structure type.

### Claim 26 (depends on 25)

The process according to claim 25, wherein the SAPO material is selected from the group consisting of SAPO-34, SAPO-44, and SAPO-47.

### Claim 27 (depends on 17)

The process according to claim 17, wherein the metal is Cu present at a loading in the range of 2 and 8% by weight.