| abstract |
POLYMERIZATION CATALYSTS IN THE FORM OF DRY POWDERS ARE CONTINUOUSLY FED TO A FLUIDIZED BED REACTOR UNDER ESSENTIALLY PLUG-FOLW CONDITIONS BY A SEQUENTIAL REPETITION OF THE STEPS OF DISPENSING UNDER CONTROLLED CONDITIONS, A DESIRED QUANTITY OF CATALYST FROM A CATALYST SUPPLY SOURCE TO A CHAMBER WHICH IS ALTERNATELY COMMUNICABLE WITH SUCH SUPPLY SOURCE AND THE REACTION ZONE OF THE FLUIDIZED BED REACTOR, ISOLATING THE DISPENSED CATALYST FROM THE CATALYST SUPPLY SOURCE, EXPOSING THE DISPENSED CATALYST FROM THE THE REACTION ZONE OF THE FLUIDIZED BED REACTOR AND RAPIDLY INJECTING THE CATALYST INTO THE REACTION ZONE WITH A CARRIER GAS. |