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1. WO2017109705 - PROCESS FOR PREPARING IRON(III)-EXCHANGED ZEOLITE COMPOSITION

Publication Number WO/2017/109705
Publication Date 29.06.2017
International Application No. PCT/IB2016/057837
International Filing Date 20.12.2016
IPC
C01B 39/02 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
39Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
02Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
B01J 29/72 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
29Catalysts comprising molecular sieves
04having base-exchange properties, e.g. crystalline zeolites, pillared clays
06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
70of types characterised by their specific structure not provided for in groups B01J29/08-B01J29/65130
72containing iron group metals, noble metals or copper
B01D 53/94 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
B01D 46/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
46Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
CPC
B01D 2255/20738
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
20Metals or compounds thereof
207Transition metals
20738Iron
B01D 2255/50
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2255Catalysts
50Zeolites
B01D 53/9418
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
9404Removing only nitrogen compounds
9409Nitrogen oxides
9413Processes characterised by a specific catalyst
9418for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
B01J 2229/18
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2229Aspects of molecular sieve catalysts not covered by B01J29/00
10After treatment, characterised by the effect to be obtained
18to introduce other elements into or onto the molecular sieve itself
B01J 2229/186
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2229Aspects of molecular sieve catalysts not covered by B01J29/00
10After treatment, characterised by the effect to be obtained
18to introduce other elements into or onto the molecular sieve itself
186not in framework positions
B01J 29/072
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
29Catalysts comprising molecular sieves
04having base-exchange properties, e.g. crystalline zeolites
06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
064containing iron group metals, noble metals or copper
072Iron group metals or copper
Applicants
  • BASF CORPORATION [US]/[US]
Inventors
  • FU, Qi
  • SLAWSKI, Barbara
  • PFAB, Peter
Agents
  • CAGLE, Ryan W.
Priority Data
62/270,73722.12.2015US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR PREPARING IRON(III)-EXCHANGED ZEOLITE COMPOSITION
(FR) PROCÉDÉ DE PRÉPARATION DE COMPOSITION DE ZÉOLITE À ÉCHANGE DE FER (III)
Abstract
(EN)
The present disclosure relates to processes for formation of a molecular sieve, particularly a metal- promoted molecular sieve, and more particularly an Iron(III) exchanged zeolite. Preferably, the zeolite is of the chabazite form or similar structure. The processes can include combining a zeolite with Iron(III) cations in an aqueous medium. The process can be carried out at a pH of less than about 7, and a buffering material can be used with the aqueous medium. The processes beneficially result in Iron exchange that can approach 100% along with removal of cations (such as sodium, NH4, and H) from the zeolite. An Iron(III)-exchanged zeolite prepared according to the disclosed processes can include about 2,000 ppm or less of cation and about 1% by weight or greater of Iron(III). The disclosure also provides catalysts (e.g., SCR catalysts) and exhaust treatment systems including the Iron(III)-exchanged zeolite.
(FR)
La présente invention concerne des procédés de formation d'un tamis moléculaire, en particulier d'un tamis moléculaire activé par un métal, et plus particulièrement d'une zéolite à échange de Fer (III). La zéolite est, de préférence, de la forme chabasite ou d'une structure similaire. Les procédés peuvent consister à combiner une zéolite avec des cations de fer (III) dans un milieu aqueux. Le procédé peut être conduit à un pH inférieur à environ 7, et un matériau tampon peut être utilisé avec le milieu aqueux. Les procédés permettent avantageusement un échange de fer qui peut s'approcher des 100 % avec élimination des cations (tels que le sodium, le NH4 et l'H) de la zéolite. Une zéolite à échange de fer (III) préparée selon les procédés décrits peut comprendre environ 2 000 ppm de cation ou moins et environ 1 % en poids ou plus de fer (III). L'invention concerne également des catalyseurs (par exemple, des catalyseurs SCR) et des systèmes de traitement d'échappement comprenant la zéolite à échange de Fer (III).
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