Canning structure and catalyst carrying method thereof

(19)

(11)

EP 1 067 278 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.08.2002 Bulletin 2002/33

(43)	Date of publication A2:
	10.01.2001 Bulletin 2001/02

(21)	Application number: 00305759.3

(22)	Date of filing: 07.07.2000

(51)	International Patent Classification (IPC)⁷: F01N 3/28, F01N 7/18, B01J 35/04

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

08.07.1999 JP 19412599

(71)	Applicant: NGK INSULATORS, LTD.
	Nagoya-City, Aichi Prefecture 467-8530 (JP)

(72)	Inventors:
	Yamada, Toshio, c/o NGK Insulators, Ltd Nagoya City, Aichi Prefecture 467-8530 (JP) Tanaka, Mikio, c/o NGK Insulators, Ltd Nagoya City, Aichi Prefecture 467-8530 (JP)

(74)	Representative: Paget, Hugh Charles Edward et al
	MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)

(54)	Canning structure and catalyst carrying method thereof

(57) A canning structure comprises a ceramic honeycomb structure (10) which is to be loaded with a catalyst, canned in a metal case (11) and being held by holding material (13). An impermeable film (60) is provided between the ceramic honeycomb structure and the holding material. To load a catalyst, a catalyst slurry is poured in only on the ceramic honeycomb structure side of the impermeable film, thereby preventing the holding material from carrying the catalyst. Thus, the holding material does not carry expensive catalyst. Chipping and cracking of the ceramic honeycomb structure can be prevented during transport, during loading of catalyst, during canning, and during handling.

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