Patent ID: 9192903
Filing Date: 2015-11-24
Classification: B01J,C08F

Abstract:
1. Reactor assembly for the production of polymers including a fluidized bed reactor ( 1 ) comprising a bottom zone ( 5 ), a middle zone ( 6 ) and an upper zone ( 7 ), an inlet ( 8 ) for the fluidization gas located in the bottom zone ( 5 ), an outlet ( 9 ) for the fluidization gas located in the upper zone ( 7 ); the outlet ( means for separation of solids from gas ( the equivalent cross-sectional diameter of the upper zone ( the middle zone ( the equivalent cross-sectional diameter of the bottom zone being monotonically increasing with respect to the flow direction of the fluidization gas through the fluidized bed reactor; whereby monotonically increasing equivalent cross-sectional diameter means that the average diameter increases or is constant with respect to the flow direction of the fluidization gas through the fluidized bed reactor; and whereby monotonically decreasing equivalent cross-sectional diameter means that the equivalent cross-sectional diameter will decrease or is constant with respect to the flow direction of the fluidization gas through the fluidized bed reactor; characterized in that the ratio of the height of the fluidized bed reactor to the equivalent cross-sectional diameter of the middle zone of the fluidized bed reactor is from 2 to 10; whereby said upper zone ( whereby the boundary plane delimiting bottom zone and middle zone is the plane, where the equivalent cross-sectional diameter changes from increasing values to essentially constant values; whereby the boundary plane delimiting middle zone and upper zone is the plane, where the equivalent cross-sectional diameter changes from essentially constant values to decreasing values; whereby there is an unobstructed passageway in the direction of flow of the fluidization gas through the fluidized bed reactor from the bottom zone ( whereby the ratio of the height of the upper zone to the equivalent cross-sectional diameter of the middle zone is within the range of from 0.7 to 1.1.