Method for controlling the polymer flow in a polymerization...

Details Method for controlling the polymer flow in a polymerization... Method for controlling the polymer flow in a polymerization...

2008-07-29

2008-07-29

Teskin, Fred M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S065000, C526S901000, C526S905000

Reexamination Certificate

active

10589591

ABSTRACT:
A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of polymer per m3of reactor occupied by the polymer) being higher than 80% of the “poured bulk density” of the polymer, the method being characterized in that a liquid stream is continuously fed into the polymerization reactor at a mass flow rate per unity of reactor surface higher than 30 Kg/h m2.

REFERENCES:
patent: 5728353 (1998-03-01), Govoni et al.
patent: 728769 (1996-08-01), None
patent: 782587 (1997-07-01), None
patent: 1012195 (2000-06-01), None
patent: 2005/019280 (2005-03-01), None
D. Geldart (Editor), “Chapter 7—High Velocity Fluidized Beds,”Gas Fluidization Technology, John Wiley & Sons Ltd., p. 155-195 (1986).

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