Stainless steel foam supported catalysts for the oxidation of aromatic compounds

Patent metadata

Field	Value
Publication number	US-2019054451-A1
Application number	US-201716077337-A
Country	US
Kind code	A1
Filing date	Feb 10, 2017
Priority date	Feb 12, 2016
Publication date	Feb 21, 2019
Grant date	—

Abstract

The invention provides a catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam. The catalyst is effective in oxidising aromatic compounds such as toluene and o-cresol and, advantageously, is particularly effective when the oxidation is carried out at elevated temperatures that correspond to temperatures attained in areas of the aircraft where cabin air is recirculated.

First claim

1 . A catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam.

2 . A catalyst according to claim 1 , wherein the iron oxide, nickel, ceria or palladium is present in an amount of 2 to 15 wt %.

3 . A catalyst according to claim 1 , wherein the catalyst comprises iron oxide.

4 . A catalyst according to claim 1 , wherein the catalyst comprises nickel.

5 . A catalyst according to claim 1 , wherein the catalyst comprises ceria.

6 . A catalyst according to claim 1 , wherein the catalyst comprises palladium.

7 . A method of oxidising a compound of formula (I):

where R 1 is a hydrocarbyl group having from 1 to 5 carbon atoms, —R 2 is chosen from —OH, a group of formula (II), (III), or (IV)

a hydrocarbyl group having from 1 to 5 carbon atoms, —Br, —Cl or —Fl and x is from 0 to 2;
and wherein said method comprises heating the compound in a gas containing oxygen in the presence of a catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam.

8 . A method according to claim 7 , wherein the compound in a gas containing oxygen is heated in the presence of said catalyst to a temperature of from 150° C. to 450° C., or 200 to 400° C.

9 . A method of treating air in an air handling system comprising heating the air in the presence of a catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam.

10 . A method according to claim 9 , wherein the air is heated in the presence of said catalyst to a temperature of from 150° C. to 450° C. or 200 to 400° C.

11 . A catalyst according to claim 2 , wherein the catalyst comprises iron oxide.

12 . A catalyst according to claim 2 , wherein the catalyst comprises nickel.

13 . A catalyst according to claim 2 , wherein the catalyst comprises ceria.

14 . A catalyst according to claim 2 , wherein the catalyst comprises palladium.

Assignees

• Univ Court Univ St Andrews

Inventors

• Irvine John Thomas Sirr
• Cassidy Mark
• Jain Sneh

Classifications

• B64D13/06

  the air being conditioned (pressurising B64D13/02) · CPC title

• B01J23/745 Primary

  Iron · CPC title

• B01D2257/708

  Volatile organic compounds V.O.C.'s · CPC title

• B01D2255/20753

  Nickel · CPC title

• B01J23/862

  Iron and chromium · CPC title