Flash-drying process for a solvent solution of a polymer or copolymer
AssigneeMitsui Petrochemical Industries, Ltd.
InventorsKenichi Tominari, Yuzi Miura, Kunio Furutachi, Yoshihiro Tsukamoto
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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.
Claims5
A flash-drying process for removing a solvent from a liquid solution comprising a solvent and an elastomeric polymer or copolymer dissolved in said solvent and said solution having a viscosity of about 10 to about 10,000 centipoises maintained at an elevated temperature and pressure, which comprises flashing said solution into a flashing zone via a pipeline, said flashing zone being provided in connection to the end of said pipeline and being maintained at a lower pressure than the pressure of the solvent solution through a means for releasing said elevated pressure, and feeding an inert stripping agent into the solution at any point between said pressure-releasing means and said flashing zone, thereby evaporating and separating the solvent from the solution.
Dependencies are inferred from the claim text.