C-8H

Prominent Systems' C8-H resin is a high-capacity, conventional gel polystyrene strong acid cation exchange resin designed for use in industrial water and waste equipment. Cation resin in hydrogen form removes positive ions such as calcium, magnesium , potassium an sodium by replacing them with hydrogen. When the resin bed is exhausted the positively charged ions begin to pass through the bed. Functionality is returned by regeneration with diluted sulfuric or hydrochloric acid solution. The capacity obtained depends largely on the amount of acid used in the regeneration.

Prominent Systems' C8-H resin is also capable of removing in the same way dissolved iron, manganese, and also suspended matter by virtue of the filtering action of the bed.

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, Na+ form:
Swelling, Na+—>H+:
Total Capacity:
pH Range, Stability:

Polystyrene 8% cross linked with Divinylbenzene
amber spherical beads
90% Min.
Polystyrene sulfonate
H+
800 g/l (50 lb./ft.³)
16-50
50–56%
5% max.
1.8 meq/ml
0–14

CHEMICAL AND THERMAL STABILITY
Prominent Systems' C8-H resin is insoluble in dilute or moderately concentrated acids, alkalies, and in all common solvents. However, exposure to >1 ppm of free chlorine, “hypochlorite” ions, or other strong oxidizing agents over long periods of time will eventually break down the crosslinking. Temperature over 30 ^oC (85 ^oF) will accelerate the oxidation. 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 Polystyrene sulfonated resins, it is thermally stable to higher than 138 ^oC (280 ^oF) in the alkali (for instance, sodium) or alkaline earth (calcium and magnesium) salt forms. The free acid form tends to hydrolyze in water temperatures appreciably higher than 120 ^oC (250 ^oF) thereby losing capacity, as the functional groups are gradually replaced by hydroxyl groups.