Strongly Basic Anion Exchange Resins
Diaion Strong base anion exchange resins are based on crosslinked polystyrene matrix having quaternary ammonium groups (NR3+). Among the Diaion product line, there are SA-grades of gel type, PA-grades of porous type, and HPA-grades of highly porous-type. The standard shipping is Cl- form (in some cases OH- form is available). Type I resins have trimethyl ammonium groups which impart higher basicity. In the co-current regeneration mode, the treated water will have the lowest silica leakage. Type I resins also have higher chemical stability and can be applied at higher temperature than type II or acrylic based resins.
SA10A is a type I resin with standard crosslinkage. SA12A is a type I resin with slightly lower crosslinkage and typically recommended for treatment of surface waters with troublesome organic content. These resins are mainly used for water treatment. SA11A is type I resin with low crosslinkage used for special applications such as high organic removal or as a primary bed polisher anion. NSA100 is a gel type I resin with high crosslinkage. It is used for special applications such as iodine isolation from brine. Ion Exchange resins with good uniformity particle size are necessary to reduce the reagents costs and spent waste waters in manufacturing pure waters. UBA100 and 120 are also used in other fields for their osmotic stability.
Porous-type ion exchange resins of porous polymer matrix have good resistance against swelling and shrinking, though their exchange capacity is lower than gel-type ion exchange resins of the same degree of crosslinkage. These resins are effective when highly purified effluents are needed, e.g. removal of silica to very low concentration. They are suitable for treatments of waste waters with organic compounds. PA312 and PA316 are generally used in waste water treatments, and PA308 is used for demineralization and decolonization of sugar liquors. HPA25L is typically used for treatment of large molecules in special process applications such as enzyme purification as enzyme carriers for treatment of biopharmaceutical substances, and treatment of feed solutions of high colors and tannins.
* Also available as L grades where the particle size thru 425 µm is 1% max. 1- Low-odor and low leachable anion exchange resins are available as F grade
Type II resins have dimethylethanol ammonium groups which impart slightly lower basicity. This provides an advantage of easier regeneration than type I and slightly higher capacity.
SA20A is type II gel resin of standard crosslinkage. It is popularly used for water treatment with its easy regeneration. UBA200 is a uniform type 2 gel anion resin for better osmotic stability. Porous-type type II resins have better efficiency during regeneration though they have lower basicity and chemical stability than type I. PA418 is generally used in water treatment while PA408 and Relite JA420 are used to demineralize and to decolorize sugar liquors.
* Also available as L grades where the particle size thru 425 µm is 1% max. 1- Low-odor and low leachable anion exchange resins are available as F grade
The Relite brand of ion exchange resins are employed for water treatment and food processing applications. The Type I and Type II anions are offered in both gel and macroporous styles.
In addition to the styrenic based anions, Itochu also offers strong base anions with an acrylic matrix. Both gel type (Relite JA830) and macroporous (Relite JA800) are offered. These resins are used from simple water treatment to decolorizing of sugar solutions. In addition to the acrylic anions, we also offer a nitrate selective anion (Relite JA450) for this specialty application
