Patent ID: 7494626

Claim:
Apparatus for delivering catalyst slurry to a polymerization vessel comprising: a first vessel comprising a first housing, a first catalyst slurry inlet, a first oil inlet and a first catalyst slurry outlet, the first vessel adapted to contain an amount of a catalyst slurry, the catalyst slurry comprising a quantity of catalyst particles and a first oil; a mixing means to maintain particle dispersion of the catalyst particles within the catalyst slurry in the first vessel; a second vessel comprising a second housing, a second catalyst slurry inlet and a second catalyst slurry outlet, the second vessel in fluid communication with the first vessel via the first catalyst slurry outlet and the second catalyst slurry inlet; a means for feeding a transport medium to the second catalyst slurry outlet to form a catalyst mixture; and a polymerization vessel comprising a first monomer inlet and a third catalyst slurry inlet, the polymerization vessel in fluid communication with the second vessel via the second catalyst slurry outlet and third catalyst slurry inlet; further comprising a first monomer stream comprising C 2 to C 16 alpha-olefins; at least one removal device, the removal device adapted to remove poisons from the first monomer stream, wherein the at least one removal device comprises a third vessel and at least one molecular sieve material disposed in the third vessel, the third vessel comprising a second monomer feed inlet and a monomer feed outlet, and the third vessel in fluid communication with the polymerization vessel via the monomer feed outlet and the first monomer feed inlet.