Process for the gas phase polymerization and copolymerization of olefin monomers
AssigneesBraskem S.A., Convex International
InventorsAntonio Luiz Duarte Braganca, Antonio Luiz Ribeirio de Castro Morschbacker, Enio Rubbo, Cid Neto Miro, Tamara Barlem, Arj Mukherjee
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Abstract
A process for polymerizing monomers in the gas phase, in fluidized bed reactors is described, where unsaturated, gas phase monomers are fed into the reactors in the presence of a mixture of inert diluents having a composition that allows the dew point to be adjusted, this leading to high production rates under stable operation in a non condensed operation mode.
Claims23
A process for polymerizing and copolymerizing olefin monomers in a gas phase reactor, under polymerization conditions and in the presence of high-activity catalysts, employing a recycle gas stream cooled in a heat exchanger with the aid of a cooling fluid, wherein in said process, the inert diluents of said recycle stream comprise:
- at least one light component designed to regulate the dew point;
- at least one intermediate volatility component,
- the composition of which is suitable to keep the recycle stream completely volatilized.
Dependencies are inferred from the claim text.