Global patent index - EP 1034134 A1

EP 1034134 A1 2000-09-13 - AMMONIA OXIDATION CATALYSTS

Title (en)

AMMONIA OXIDATION CATALYSTS

Title (de)

AMMONIAOXIDATIONSKATALYSATOREN

Title (fr)

CATALYSEURS D'OXYDATION DE L'AMMONIAC

Publication

EP 1034134 A1 (EN)

Application

EP 98952918 A

Priority

  • GB 9803386 W
  • GB 9724310 A

Abstract (en)

[origin: WO9925650A1] An ammonia oxidation catalyst cartridge unit comprises a pair of retaining meshes spaced apart by less than 50 mm defining an enclosure filled with a random packed mass of particles of a composition comprising oxides of at least one metal selected from manganese, iron, nickel and cobalt, especially cobalt and at least one element A selected from rare earths and yttrium in such proportions that the element A to cobalt atomic ratio is in the range of 0.8 to 1.2. The catalyst particles have a minimum dimension of at least 0.5 mm and a maximum dimension of not more than 5 mm, and the spacing between the meshes is at least 4 times, but not more than 50 times, the maximum dimension of the particles. The unit may extend across the ammonia oxidation reactor cross section or a catalyst cartridge may comprise a grid or apertured plate, extending across the cross section of the reactor, with a unit as aforesaid in each aperture.

IPC 1-7 (main, further and additional classification)

C01B 21/26; B01J 8/02; B01J 23/83; C01B 21/28

IPC 8 full level (invention and additional information)

B01J 8/00 (2006.01); B01J 8/02 (2006.01); B01J 35/02 (2006.01); C01B 21/26 (2006.01); C01B 21/28 (2006.01)

CPC (invention and additional information)

B01J 8/0242 (2013.01); B01J 8/008 (2013.01); B01J 8/0214 (2013.01); B01J 19/2495 (2013.01); B01J 35/02 (2013.01); C01B 21/265 (2013.01); C01B 21/28 (2013.01); B01J 2208/00884 (2013.01)

Citation (search report)

See references of WO 9925650A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9925650 A1 19990527; AU 1046099 A 19990607; AU 733971 B2 20010531; CA 2306780 A1 19990527; EP 1034134 A1 20000913; GB 9724310 D0 19980114; NO 20002522 A 20000516; NO 20002522 D0 20000516; ZA 9810270 B 19990519

INPADOC legal status

2001-10-04 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010331

2000-12-06 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001018

2000-09-13 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000412

2000-09-13 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE