Process for the preparation of high density ion exchange resins and ion exchange resins thus obtained
AssigneeUranium Pechiney Ugine Kuhlmann
InventorsEdouard Grimaud, Maurice Troussier
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Abstract
A process for obtaining a dense ion-exchange anionic resin and the product so obtained. The resin is of the type based on a co-polymer of styrene and divinylbenzene. The process involves a liquid phase treatment comprising contacting the resin with bromide in a liquid phase and simultaneously charging the liquid phase with gaseous chlorine while in contact with the resin for reaction to provide a styrene divinylbenzene copolymer ion-exchange anionic resin containing bromine and chlorine groups.
Claims8
A process for increasing the density of an ion-exchange anionic resin based on a copolymer of styrene and divinylbenzene comprising in a liquid phase treatment, contacting the resin with bromine in a liquid phase and simultaneously charging the liquid phase with gaseous chlorine while in contact with the resin for reaction to provide a styrene-divinylbenzene copolymer ion-exchange anionic resin containing bromine and chlorine groups.
A process for increasing the density of an ion-exchange anionic resin based on a copolymer of styrene and divinylbenzene comprising, in a vapor phase treatment passing chlorine gas through bromine in a liquid phase and contacting the resin with a mixture of vapors therefrom for reaction to provide a styrene-divinylbenzene copolymer ion-exchange anionic resin containing bromine and chlorine groups.
A process for increasing the density of an ion-exchange anionic resin based on the copolymer of styrene and divinylbenzene comprising, in a vapor phase treatment, passing air or an inert gas through bromine in a liquid phase to provide bromine vapors, passing the bromine vapors with gaseous chlorine simultaneously into contact with the resin for reaction to provide a styrene-divinylbenzene copolymer, ion-exchange anionic resin containing bromine and chlorine groups.
Dependencies are inferred from the claim text.