A-S1-OH

Prominent Systems' A-S1 (OH) resin is a high-capacity Type I strong base anion exchange resin specially designed for use in commercial or industrial demineralized water equipment. The resin removes all anion ions such as sulfate, chloride, bicarbonate, and silica, by replacing them with hydroxide ions. When the resin bed is exhausted the weakest anions (such as silica) begin to pass through the bed. Functionality is returned by regeneration with diluted sodium hydroxide solution.

Typical Physical, Chemical & Operating Characteristics

Polymer Structure: Physical Form and Appearance: Whole Bead Count: Functional Groups: Ionic Form (as shipped): Shipping Weight, approx.: Mesh Size (U.S. Std): Moisture retention: Total Exchange Capacity: pH Range, Stability:

Polystyrene  cross linked with Divinylbenzene  tough spherical beads  90% Min.  -N+(CH3)3OH- (OH form)  OH-  657 g/l (41 lb./ft.3)  16-50  max 60%  1.1 meq/ml  0–14

CHEMICAL AND THERMAL STABILITY
Prominent Systems' A-S1 (OH) resin is insoluble in dilute or moderately concentrated acids, alkalies, and in all common solvents. However, exposure to significant amounts of free chlorine, “hypochlorite” ions, or other strong oxidizing agents over long periods of time will eventually break down the crosslinking. This will tend to increase the moisture retention of the resin, decreasing it s mechanical strength, as well as generating small amounts of extractable breakdown products. Like all conventional el type polystyrene Type I strong base anion resins, it is thermally stable to 60 ^oC (140 ^oF). The hydroxide form tends to degrade in water temperatures appreciably higher than 52 ^oC (125 ^oF), thereby losing capacity, as the functional groups are gradually replaced by hydroxyl groups.