F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
26/151, 113/71
F01N 3/28 (2006.01) B01D 53/94 (2006.01) B01J 35/04 (2006.01) B01J 37/02 (2006.01)
Patent
CA 1293363
A B S T R A C T There is provided a process and apparatus for making, preferably continuously, a catalytic converter element of core especially adapted for the treatment of exhaust from an internal combustion engine, whether spark or compression ignited. The converter element may be a fan-folded or accordion folded thin metal strip or a spirally wound element which carries strongly adhered to the surface thereof a catalyst, e.g. a noble or precious metal catalyst such as platinum and/or palladium and/or rhodium. The metal strip entering the process is an aluminum coated ferritic ribbon between 0.001 and 0.003 inches thick, and 1 inch to 30 inches wide. The strip is preferably annealed and perforated at pre- determined intervals. Thereafter, the strip is corrugated and given a washcoat of a refractory metal oxide which is calcined onto the surface. One or more precious metal catalysts are applied and dried. The strip is desirably, albeit optionally, creased in a manner to enable it to be folded back and forth upon itself, severed to size, and folded to build a catalytic converter element. Final steps may include insertion of the catalytic converter element into a housing and affixing end caps to form a complete unit. This process provides a continuous low cost means for making catalytic converters.
529915
Cornelison Richard C.
Retallick William B.
Cornelison Richard C.
Gowling Lafleur Henderson Llp
Retallick William B.
W.r. Grace & Co.,-Conn.
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