Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in two or more physically distinct zones
Patent
1995-03-09
1995-11-14
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in two or more physically distinct zones
526 71, 528272, 5283083, 5283085, C08F 200, C08G 6300
Patent
active
054667658
ABSTRACT:
The present invention discloses a polymerization system having at least two reaction chambers wherein vacuum is used to remove vapors therefrom comprising a single vacuum system for supplying vacuum in increasing amounts to successive reaction chambers. Also disclosed is a polymerization process having at least first and second reaction chambers in which the pressure is decreased successively from said first chamber to a final chamber, said process comprising the steps of:
maintaining a vacuum in said final chamber by removing final chamber vapors therefrom via a final chamber ejector connected thereto by a vacuum line;
directing discharge from said final chamber ejector into a first chamber precondenser to produce first chamber non-condensed materials and condensed first chamber ejector motive fluid;
directing said first chamber ejector non-condensed materials from said first chamber precondenser to a second ejector connected thereto by a vacuum line;
directing discharge from said second ejector into a second condenser to produce second condenser non-condensed materials and condensed second ejector motive fluid; wherein said second condenser is connected to a vacuum pump.
REFERENCES:
patent: 3157619 (1964-11-01), Bell et al.
patent: 3250747 (1966-05-01), Mitchell et al.
patent: 3359074 (1967-12-01), Dobo
patent: 3468849 (1969-09-01), Rothert et al.
Ryans, J. L. and D. L. Roper, Process Vacuum System Design & Operation, McGraw-Hill Book Company, New York, 1986, pp. 230-237.
Haseltine Douglas M.
Ryans Jimmy L.
Yount Thomas L.
Eastman Chemical Company
Foelak Morton
Gwinnell Harry J.
Harding Karen A.
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