Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Removing and recycling removed material from an ongoing...
Reexamination Certificate
2009-04-03
2011-11-29
Cheung, William (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Removing and recycling removed material from an ongoing...
C526S073000, C526S077000, C526S351000
Reexamination Certificate
active
08067512
ABSTRACT:
Monomer/solvent separation and recycle processes for continuous supercritical, solution and advanced solution polymerization processes for propylene-containing polymers and their blends are provided. The advantageous monomer/solvent separation and recycle process includes heating a polymer-lean recycle stream coming from a gravimetric separator positioned downstream of the reactor to form a heated polymer-lean recycle stream, and subsequently combining the heated polymer-lean recycle stream with the one or more homogenous reactor effluent streams to form a heated reactor effluent mixed stream. The heated reactor effluent mixed stream may then be passed through a pressure let-down valve followed and a gravimetric separator, such as to provide for reduced fouling propensity of the polymer-rich phase and sufficient heating of the polymer-rich phase to be able to pass through the remainder of the processing steps to form a propylene based polymer product without additional heat.
REFERENCES:
patent: 4319021 (1982-03-01), Irani et al.
patent: 5811496 (1998-09-01), Iwasyk et al.
patent: 7163989 (2007-01-01), Friedersdorf
patent: 7279536 (2007-10-01), Brant et al.
patent: 7354979 (2008-04-01), Brant et al.
patent: 2008/0090974 (2008-04-01), Brant et al.
patent: 2008/0153996 (2008-06-01), Friedersdorf et al.
patent: 2008/0234443 (2008-09-01), Kiss et al.
patent: 2008/2147677 (2008-09-01), Mehta et al.
U.S. Appl. No. 12/016,346, filed Jan. 18, 2008, commonly owned co-pending application.
U.S. Appl. No. 12/074,496, filed Mar. 4, 2008, commonly owned co-pending application.
Kiss Gabor
Lattner James Richardson
Cheung William
Exxonmobil Research and Engineering Company
Migliorini Robert A.
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