# US 2014/0155257 A1 · Catalyst from flame-spray pyrolysis and catalyst for autothermal propane dehydrogenation

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- Number: US 2014/0155257 A1
- Document ID: US20140155257A1
- Status: Published application
- Kind: A1
- Application number: 14/171,868
- Filed: 2014-02-04
- Published: 2014-06-05
- Earliest claimed: 2011-01-25
- Assignees: BASF SE
- Applicants: BASF SE
- Inventors: Stefan Hannemann; Dieter Stützer; Goetz-Peter Schindler; Peter Pfab; Frank Kleine Jäger; Dirk Großschmidt
- Web page: https://patentgrep.com/patent/US20140155257A1

## CPC

- B01J 23/63: with rare earths or actinides
- B01J 23/58: with alkali- or alkaline earth metals
- B01J 35/45: Nanoparticles
- B01J 35/613: {10-100 m2/g}
- B01J 35/70: characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00)
- B01J 35/77: Compounds characterised by their crystallite size
- B01J 37/0072: {Preparation of particles, e.g. dispersion of droplets in an oil bath}
- B01J 37/349: {making use of flames, plasmas or lasers}
- B01J 2235/15: X-ray diffraction
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The invention relates to a method of production of catalyst particles, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on zirconium dioxide as support, comprising the steps: preparation of one or more solutions containing precursor compounds of Pt, Sn and at least one further element of La or Cs and also ZrO2, converting the solution(s) to an aerosol, bringing the aerosol into a directly or indirectly heated pyrolysis zone, carrying out pyrolysis, and separation of the particles formed from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetylacetonate, lanthanum(II) acetylacetonate and cesium acetate, hexamethyldisiloxane, tin 2-ethylhexanoate, platinum acetylacetonate, zirconium(IV) propylate in n-propanol and lanthanum(II) acetylacetonate. The invention also relates to the catalyst particles obtainable using the method according to the invention, and to the use thereof as dehydrogenation catalysts.

## Claims

### Claim at position 1

1-17. (canceled)

### Claim 18

A catalyst particle, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on a support comprising zirconium dioxide and optionally silicon oxide, wherein said catalyst particle is obtained by a method comprising the steps
(i) preparing one or more solutions containing precursor compounds of platinum, tin and the at least one further element, selected from lanthanum and cesium, and also of zirconium dioxide and optionally silicon dioxide,
(ii) converting the solution(s) to an aerosol,
(iii) bringing the aerosol into a directly or indirectly heated pyrolysis zone,
(iv) carrying out pyrolysis with a gas, and
(v) separating the catalyst particles formed from the pyrolysis gas.

### Claim 19 (depends on 18)

The catalyst particle of claim 18, wherein said catalyst particle contains 0.05 to 1 wt. % Pt and 0.05 to 2 wt. % Sn.

### Claim 20 (depends on 18)

The catalyst particle of claim 18, wherein said catalyst particle has a specific surface of 36 to 70 m2/g.

### Claim 21 (depends on 18)

The catalyst particle of claim 18, wherein said catalyst particles comprises 30 to 99.5 wt. % ZrO2 and 0.5 to 25 wt. % SiO2 as support, and 0.1 to 1 wt. % Pt, 0.1 to 10 wt. % Sn, relative to the mass of the support, La and/or Cs, wherein at least Sn and at least La or Cs are contained.