Residual solvent removal from chlorinated polymers
AssigneeImperial Chemical Industries PLC
InventorRalph John Gilbert Houslay
Life of this patent
Estimating the term…
Abstract
A process for at least partly removing residual chlorinated hydrocarbon solvent from a chlorinated polymer obtained by precipitation from the said solvent, which comprises treatment of the chlorinated polymer with the vapor of an aliphatic halo-hydrocarbon having a boiling point below that of the chlorinated hydrocarbon to be removed, at a temperature 10.degree. above the boiling point of the halo-hydrocarbon employed in the treatment.
Claims6
A process for at least partly removing residual chlorinated hydrocarbon solvent from a chlorinated polymer obtained by precipitation from the said solvent, which process comprises treatment of the chlorinated polymer with the vapour of an aliphatic halo-hydrocarbon having a boiling point below that of the chlorinated hydrocarbon to be removed, the said treatment being carried out at a temperature of at least 10.degree. C. and which is at least 10.degree. C. above the boiling point of the halo-hydrocarbon employed in the treatment.
Dependencies are inferred from the claim text.