Apparatus and method for producing solid polymeric material from

Details Apparatus and method for producing solid polymeric material from Apparatus and method for producing solid polymeric material from

1974-12-09

1976-06-15

Sofer, Jack

Concentrating evaporators

Superheating and pressure release

With extruder

425203, 259 45, 259 68, 259109, 264102, B01D 128, B01F 702, A01J 1700

Patent

active

039635589

ABSTRACT:
Dilute polymer solution (about 5 to 50% by weight of solid polymer) is heated and flashed in a concentrator, is delivered to an extruder at a concentration of about 30 - 80% by weight of solid polymer, further solvent is vaporized and vented off, and the solid polymer material is subjected to counter-current fluid flow in single or multiple stages, with back pressure control at the polymer exit.

REFERENCES:
patent: 2836851 (1958-06-01), Holt
patent: 3046609 (1962-07-01), Bergmeister et al.
patent: 3067462 (1962-12-01), Kullgren
patent: 3082816 (1963-03-01), Skidmore
patent: 3376603 (1968-04-01), Colombo
patent: 3535737 (1970-10-01), Hendry
patent: 3738409 (1973-06-01), Skidmore
patent: 3799234 (1974-03-01), Skidmore

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