Resins s. Ion exchangers

Resins s. Ion exchange resins Resolution s. Stereoisomers Resonance system s. No-bond resonance system Resorcinol monoesters s. m-Diol monoesters Resorcinols... 

Resins s. Ion exchange resins Resolution s. Stereoisomers Resorcinols... 

We have previously described ammonia removal with zeolites. However, the development of new methods capable of effective and total ammonia removal from wastewater are extremely attractive in this regard, the ion-exchange removal of ammonia with a Dowex HCR-S ion-exchange resin has been carried out [79],... 

The following table summarizes the main economic features of the electrodialysis process to make silica sols in comparison with a plant s ion exchange resin process. 

IsHii, S. Ion-exchange chromatography of amino acids and peptides. I. A new determination method of basic amino acids on a carboxylic acid resin. J. Biochem. (Tokyo) 43, 531—537 (1956). 

The degree of swelling and shrinking is important for design of ion-exchange columns, especiaUy for the location of the distributors used to disperse incoming fluids, and coUect outgoing ones, evenly over the cross-sectional area of the resin bed. Once placed, these distributors are not adjustable. The upper distributor should be above (the lower one below) the resin bed, even in the bed s swoUen form. 

The Asahi process (Fig. 16-63) is used principally for high-volume water treatment. The hquid to be treated is passed upward through a resin bed in the adsorption tank. The upward flow at 30-40 m/h [12-16 gal/(min ft")] keeps the bed packed against the top. After a preset time, 10 to 60 min, the flow is interrupted for about 30 s, allowing the entire bed to drop. A small portion (10 percent or less) of the ion-exchange resin is removed from the bottom of the adsorption tank and transferred hydraulically to the hopper feeding the regeneration tank. 

---