Method for making improved pellet type catalyst

Details Method for making improved pellet type catalyst Method for making improved pellet type catalyst

B - Operations, Transporting

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252/45, 252/52.L

B01J 21/04 (2006.01) B01J 23/00 (2006.01) B01J 35/08 (2006.01) B01J 37/06 (2006.01)

Patent

CA 1074770

C-2658 A-22,275 METHOD FOR MAKING IMPROVED PELLET TYPE CATALYST Abstract of the Disclosure A method for making improved pellet type catalysts adapted for use in automotive emissions clean-up and utilizing a support material having relatively high alkali metal content, comprising the steps of grinding the support material to the desired size, forming the pellet into the desired shape and size, calcining the pellet to obtain the desired surface area, soaking the calcined pellet in a dilute acid for a short period of time to form the alkali metal salt of the acid to a controlled depth inward from the surface of the pellet, and impregnating the pel- let with the desired catalytically active metallic material after draining the acid wash solution, the depth of penetration of the catalytic material being limited to the depth treated by the acid wash.

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