Back to results
US 2014/0350213 A1Published application
Purification of polyamide particles
AssigneeBASF SE
InventorsFaissal-Ali El-Toufaili, Achim Stammer, Jens Becker, Karsten Daunke, Thomas Sauer
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for purifying polyamide particles wherein these are contacted with a lactam-containing treatment medium with or without a gaseous treatment medium.
Claims30
1-29. (canceled)
A process for producing polyamide particles, which comprises
- a) providing crude particles of polyamide,
- b) contacting the crude particles of polyamide provided in step a) in a treatment zone with a first liquid treatment medium (B1) comprising at least one lactam and removing the laden treatment medium (B1),
- c) optionally contacting the crude particles of polyamide additionally with a second gaseous treatment medium (B2).
Dependencies are inferred from the claim text.