Discharging granular linear polycondensates

Details Discharging granular linear polycondensates Discharging granular linear polycondensates

1978-12-01

1981-03-24

Smith, Edward J.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528483, 528503, C08F 236, C08F 600

Patent

active

042581788

ABSTRACT:
A process for discharging a granular organic polymer, which is sensitive to molecular oxygen at elevated temperatures, from a treatment zone in which it has been continuously treated, at above 70.degree. C., with an inert gas which is free from molecular oxygen, and has subsequently been cooled, which process comprises withdrawing the polymer at .ltoreq.50.degree. C. through a narrow elongate tubular discharge zone, the said zone always being filled with granular polymer.

REFERENCES:
patent: 2944047 (1960-07-01), Schutze et al.
patent: 3544525 (1970-12-01), Balint et al.
patent: 3821171 (1974-06-01), Beaton
patent: 4092784 (1978-06-01), Dietrich et al.

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