Apparatus for the multiple stage devolatilization of mass proces

Details Apparatus for the multiple stage devolatilization of mass proces Apparatus for the multiple stage devolatilization of mass proces

1981-07-15

1983-05-17

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

202173, 202205, 528501, C08F 606, B01J 1202

Patent

active

043839720

ABSTRACT:
Disclosed is a multiple-stage flash devolatilization process, and apparatus for use therein, for recovering volatiles from mass processable polymers, which enables optimally low pressures to be employed without the necessity for refrigeration to condense the volatiles recovered thereby, comprising separating the volatiles from the polymeric material by flashing in a first flash devolatilization zone to remove the majority of the volatiles and then flashing in at least one additional flash devolatilization zone maintained at a lower pressure, preferably as low as practically possible, to remove residual volatiles, and then recovering the volatiles for further use by feeding the volatiles recovered from the additional flash zones back into the first flash zone, the higher pressure of which allows the combined free volatiles present therein to then be condensed in a conventional non-refrigeration cooling process.

REFERENCES:
patent: 3072626 (1963-01-01), Cines
patent: 3242969 (1966-03-01), Kiguchi
patent: 3668161 (1972-06-01), Nauman
patent: 3853672 (1974-12-01), Gordon et al.
patent: 3884766 (1975-05-01), Bir et al.
patent: 3927983 (1975-12-01), Gordon et al.
patent: 4017498 (1977-04-01), Hopkins

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