Flash-drying process for a solvent solution of a polymer or copo

Details Flash-drying process for a solvent solution of a polymer or copo Flash-drying process for a solvent solution of a polymer or copo

1987-06-16

1990-03-06

Bascomb, Wilbur

Concentrating evaporators

Processes

159 21, 159 161, 159 163, 203 49, 203 88, 203 95, 528500, 528501, B01D 306, C08F 606

Patent

active

049063294

ABSTRACT:
In a flash-drying process which comprises flashing a solvent solution of a polymer or copolymer maintained at an elevated temperature and pressure into a flashing zone maintained at a lower pressure than the pressure of the solvent solution through a means for releasing said elevated pressure, thereby evaporating and separating the solvent from the solvent solution, the improvement wherein an inert stripping agent is fed into a flow of the solvent solution at any point between said pressure-releasing means and said flashing zone.

REFERENCES:
patent: 3195613 (1965-07-01), Hawkins
patent: 3197453 (1965-07-01), Harban
patent: 3262922 (1966-07-01), Payne
patent: 3586089 (1971-06-01), Moto et al.
patent: 3605872 (1971-09-01), Brault
patent: 3683511 (1972-08-01), Johnson et al.
patent: 3941664 (1976-03-01), Scoggin
patent: 3956060 (1976-05-01), Scoggin

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