B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 17/00 (2006.01) B01D 11/02 (2006.01) B22C 9/00 (2006.01)
Patent
CA 2389509
The metal content of a thermoplastic composition containing an undesirably high concentration of metal can be reduced by adding to 100 parts by weight of the composition at least about 0.3 parts by weight of a chelating agent and sufficient water to chelate metal in the composition to form chelated metal in the composition, and then removing at least some of the chelated metal from the composition.
Selon l'invention, on peut réduire la teneur en métal d'une composition thermoplastique contenant une teneur élevée et indésirable en métal, en ajoutant à 100 parties en poids de la composition au moins 0,3 parties en poids, environ, d'un agent de chélation, ainsi que de l'eau en quantité suffisante pour chélater le métal dans la composition et former un métal chelaté dans la composition, le procédé consistant ensuite à enlever de la composition au moins une partie du métal chelaté.
Bereskin & Parr
M. Argueso & Co. Inc.
LandOfFree
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