Catalyst delivery method, a catalyst feeder and their use in a polymerization process
AssigneeExxon Chemical Patents Inc.
InventorsAgapios K. Agapiou, Kathryn A. Russell
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a polymerization process.
Claims80
A method for delivering a supported bulky ligand metallocene-type catalyst system to a gas or slurry phase polymerization reactor utilizing a carrier solution comprising an antistatic agent and a liquid diluent, wherein the carrier solution serves to flush the supported bulky ligand metallocene-type catalyst system into the reactor.
A gas or slurry phase process for polymerizing olefin(s) in a reactor in the presence of a supported bulky ligand metallocene-type catalyst system, wherein the supported bulky ligand metallocene-type catalyst system is introduced to the reactor by a carrier solution, the carrier solution comprising an antistatic agent and a liquid diluent.
A polymerization catalyst composition comprising a supported bulky ligand metallocene-type catalyst system and a carrier solution, the carrier solution comprising an antistatic agent and a liquid diluent.
A continuous gas phase process for polymerizing monomer(s) in a reactor, said process comprising the steps of:
- a) introducing a recycle stream into the reactor, the recycle stream comprising one or more monomer(s) and;
- b) introducing a supported bulky ligand transition metal metallocene-type catalyst system contacted with a carrier solution, the carrier solution comprising an antistatic agent and a liquid diluent, into the reactor;
- c) withdrawing the recycle stream from the reactor;
- d) cooling the recycle stream;
- e) introducing into the reactor additional monomer and additional comonomer to replace the one or more monomer(s) polymerized;
- f) reintroducing the recycle stream into the reactor;
- and
- g) withdrawing a polymer product from the reactor.
A catalyst feeder for use in combination with a reactor vessel having within the reactor vessel a reaction zone, the catalyst feeder comprising a catalyst vessel for containing a polymerization catalyst, the catalyst vessel connected to a catalyst injection tube for delivering the polymerization catalyst to the reaction zone, the catalyst injection tube being disposed within a support tube that protrudes through the reactor vessel wall, and the catalyst feeder further comprising a means for contacting the polymerization catalyst with a carrier solution comprising an antistatic agent and a liquid diluent prior to the polymerization catalyst entering the reaction zone.
A continuous gas phase fluidized bed process for polymerizing olefins(s) in the presence of a supported bulky ligand metallocene-type catalyst system in a reactor vessel, the supported bulky ligand metallocene-type catalyst system contacted with a carrier solution comprising an antistatic agent are introduced into the reactor vessel through a catalyst injection tube, wherein the process comprises the step of withdrawing greater than 500 lbs (227 Kg) of a polymer product per hour, the polymer product having a melt index less than 1 dg/min, a density greater than 0.920 g/cc and containing less than 10 ppm of the antistatic agent.
A continuous process for polymerizing olefins(s) in the presence of a polymerization catalyst composition in a reaction zone within a polymerization reactor, the polymerization catalyst composition comprising a supported bulky ligand metallocene-type catalyst system and a carrier solution comprising an antistatic agent and a liquid diluent, wherein the supported bulky ligand metallocene-type catalyst system contacts the carrier solution for less than one minute prior to the polymerization catalyst composition entering the reaction zone.
Dependencies are inferred from the claim text.