Process for the production of polymer
AssigneeMontell Technology Company BV
InventorsPaolo Vincenzi, Arrigo Arletti
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Abstract
A process, particularly a gas phase fluidised bed process, for the production of polymers avoids formation of sheets or chunks within the reactor, without the need to use antistatic agents, which can reduce the activity of the catalyst or alter the characteristics of the yielded product. According to the invention, a device generates a corona discharge in the polymerisation reactor during the polymerisation process; an AC voltage difference is applied between the elements which constitute the discharging pair of the device.
Claims16
Catalytic polymerisation process, wherein the produced polymer is in the form of solid particles and the monomer(s) is (are) contained in a gaseous or liquid reaction medium, characterised in that a corona discharge is established in at least a portion of the space occupied by the said fluid reaction medium or by a fluid feed stream which is sent to the polymerisation zone.
The process according to any of the preceding claims wherein the corona discharge is generated by a device comprising a rod shaped inner conductor, said rod shaped inner conductor having needle shaped emitters disposed perpendicularly with the rod and a pipe surrounding the rod and coaxial with it;
- said pipe being insulated from the rod and presenting a circular hole in correspondence of each emitter, centred on the axis of the latter.
An apparatus for performing a gas phase process of polymerisation comprising a fluidised bed reactor, a gas recycle line equipped with a gas circulating device and a gas cooling means, a line for feeding monomers, a line for feeding the catalyst into the reactor, a device for withdrawing the solid polymer particles from the reactor;
- said apparatus further comprises a device for establishing a corona discharge in the reactor, in the gas recycle line or in a gas feed line.
Dependencies are inferred from the claim text.