Bulldog Technologies U.s.a., Inc.

Other

Intercat-savannah, Inc.

Regis B Lippert

Albert A Vierheilig

Edward J Demmel

David B Bartholic

Edward J Demmel, Deceased

The useful life of SO,additives having a SO,&rarr;SO,oxidation catalyst component and a SO,absorption component can be extended by employing each of these components as separate and distinct physical particles, pellets, etc.

SOx additive systems based upon use of multiple particle species

The useful life of SO.sub.X additives having a SO.sub.2 .fwdarw.SO.sub.3 oxidation catalyst component and a SO.sub.3 absorption component can be extended by employing each of these components as separate and distinct physical particles, pellets, etc.

SO.sub.x Additive systems based upon use of multiple particle species

The useful life of SO.sub.X additives having a SO.sub.2 .fwdarw.SO.sub.3 oxidation catalyst component and a SO.sub.3 absorption component can be extended by employing each of these components as separate and distinct physical particles, pellets, etc., with each component having large proportions of certain ingredients and having small proportions of certain other ingredients.

SO.sub.x additive systems based upon use of multiple particle species

The disclosed method and apparatus provides for providing addition of micro-spheroidal ('MS') Fluid Catalytic Cracking ('FCC') catalyst additives and/or bulk catalyst to an in situ circulating, active catalyst inventory of a fluid catalytic cracking unit at times and rates precisely controlled to sustain an effective additive concentration. In a preferred version of this invention, each of a series of such apparatus comprising one such device for each catalyst additive, is operated on a basic cycle time length during a portion of which the unit is engaged in active addition while in the remainder of the time it is passive.

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Sea Girt, NJ, United States of America

Regis B Lippert