Back to results
US 6,476,161 B1Granted
Method and apparatus for preparing polymers
AssigneeBorealis Technology Oy
InventorsAli Harlin, Jouni Kivelä, Esa Korhonen, Henrik Andtsjö
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBorealis Technology Oy
InventorsAli Harlin, Jouni Kivelä, Esa Korhonen, Henrik Andtsjö
Estimating the term…
The present invention concerns a method and an apparatus of introducing polymer slurry obtained from a slurry reactor into a gas phase reactor containing a fluidized bed (C, D). According to the present invention, the content of the slurry reactor (R1) is conducted directly to the fluidized bed reactor (R2) as a multiphase stream comprising polymer, active catalyst and reaction medium using at least one feed line (10; 11; 12), and the stream is fed below a first fluidized zone (C) of the gas phase reactor via inlet pipe protruding into the fluidized bed in order to increase the once-through conversion of the process. By means of the invention, the amount of unreacted monomers which needs to be recirculated is minimized and investment and operation costs of the recovery section are greatly reduced.
A method of introducing polymer slurry obtained from a slurry reactor into a gas phase reactor containing a fluidized bed (C, D) with a first fluidized zone (C) on top of a second fluidized zone (D), said fluidized zones having different flow patterns, comprising the steps of
Apparatus for preparing olefinic homopolymers and copolymers, which comprises
Dependencies are inferred from the claim text.