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AssigneeSabic Global Technologies B.V.
InventorsByron Smith John Rajarethnam, Musaad Al-Sadhan, Ravi Ranjan Kumar, Retheesh Madhusudanan Vanchiyil, Hesham Al-Shobilly, Erik René Delsman
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Process for the polymerization of one or more monomers in a fluidized bed reactor, which reactor comprises a reaction zone which is confined at the underside by a gas distribution plate and at the top side by a virtual end surface, in which a fluidized bed is maintained between the underside and the top side, and in which at least part of the gaseous stream withdrawn from the top of the reactor is cooled to a point where the stream partially condenses into a liquid and in which at least part of the resulting two-phase stream is recycled to the reactor via an inlet which terminates in the reactor below the gas distribution plate, wherein, the reaction zone of the reactor is divided into two compartments by a draft tube extending from a point located above the gas distribution plate such that the area ratio of the circumferential draft tube inlet area (Ahb) to annular area (Aa) is between 0.5 to 3, preferably 2, to a point located below the end surface.
Process for the polymerization of one or more monomers in a fluidized bed reactor, which reactor comprises a reaction zone which is confined at the underside by a gas distribution plate (3) and at the top side by a virtual end surface, in which a fluidized bed is maintained between the underside and the top side, and in which at least part of the gaseous stream withdrawn from the top of the reactor is cooled to a point where the stream partially condenses into a liquid and in which at least part of the resulting two-phase stream is recycled to the reactor via an inlet which terminates in the reactor below the gas distribution plate, wherein, the reaction zone of the reactor is divided by a draft tube into two zones, a draft tube zone (4) and an annular zone (5) extending from a point located above the gas distribution plate such that the area ratio of the circumferential draft tube zone (Ahb) to annular zone (Aa) is between 0.5 to 3 to a point located below the end surface,
Reactor system, suitable for polymerizing one or more monomers, comprising a fluid bed reactor, having at the underside a gas distribution plate, having means for the supply of reaction ingredients, having means for the withdrawal of a gaseous stream from the top of the reactor, having a cooler/condensor for cooling said gaseous stream to a point where said stream partially condenses into a liquid, and having means for recirculating the stream out of the cooler/condensor to the reactor, in the reactor, the reaction zone is divided into two compartments by a draft tube such that the area ratio of the circumferential draft tube inlet area (Ahb) to annular area (Aa) is between 0.5 to 3, and
Dependencies are inferred from the claim text.