Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Removing and recycling removed material from an ongoing...
Reexamination Certificate
2005-04-26
2005-04-26
Cheung, William K. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Removing and recycling removed material from an ongoing...
C526S351000, C526S352000, C526S901000, C526S348000
Reexamination Certificate
active
06884856
ABSTRACT:
The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.
REFERENCES:
patent: 0 770 629 (1997-05-01), None
patent: 770629 (1997-05-01), None
patent: WO 0032651 (2000-06-01), None
Benazouzz Gacem
Couronne Claire
Huchette Sebastien
Leaney Patrick
Mealares Christel Maire-Claude
BP Chemicals Limited
Cheung William K.
Finnegan, Henderson Farabow, Garrett and Dunner L.L.P.
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