Lewatit® S 4528 is a food grade, macroporous, heterodisperse, weakly basic anion exchange resin based on a styrene-divinylbenzene copolymer. It is bead-shaped and has a special bead size distribution for use in the following processes: - Lewatit WS system (fluidized bed)
- Lewatit VWS system (compound fluidized bed)
- Standard co current regenerated system.
Lewatit S 4528 is suitable in the free base for the removal of acid and simultaneous decolorization of solutions of organic products such as sugar, gelatin, glycerin, grape must, whey, fruit concentrates, etc. The macroporous structure ensures very good adsorption of both acid and organic substances (e.g. colorants). These are desorbed by regeneration with caustic soda solution. Due to its low basicity, Lewatit S 4528 can be used in the treatment of products sensitive to alkali. The partial isomerization resulting from contact with the ion exchange resin (e.g. conversion of glucose to fructose and mannose) is negligible. If using the Lewatit S 4528 to treat potable water and the aqueous solution listed above, special care should be given to the initial cycles of the new resin.Information provided by Lanxess. |
