Chelating Resin for Brine decalcification,MC:52-58%

Catalog Number	ACMA00033713
Application	·Water softening
Bulk Density	0.72-0.78g/ml
Color Form	Grey
Effective Size	0.4-0.7mm
Ionic Form	Na+
Mass Capacity	≥1.45(Cu2+)meq/ml
Max Swelling Rate	H+→ Na+ ≤40%
Max Temperature Range Limited	120℃
Moisture Content	52-58%
Nature	Cationic
Particle Size Range	0.315-1.25mm(≥95)
pH Range	1-14
Physical Description	Spherical Beads
Shipping Weight	0.65-0.73g/mL
Specific Density	1.15-1.25g/ml
Uniformity Coefficient	≤1.6
Volume Capacity	≥0.5(Ca2+)meq/ml
Whole Beads	≥90%

Frontier Research

Combination of Chelating Resin and Carboxylic Acid Resin for Decalcification of Saline Wastewater

Fargues C, et al. Separation science and technology, 2006, 41(2), 359-377.

Chelating resin has higher selectivity for calcium than carboxylic acid resin. However, chelating resin is more expensive than carboxylic acid resin. Therefore, this work achieved a complete decalcification process by combining the crude decalcification of carboxylic acid resin and the finishing step of chelating resin, and saved chelating medium.
Chromatographic process based on chelating resin and carboxylic acid resin
· After passing through a carboxylic resin, the effluent was directed to the chelating resin once the calcium concentration reached 2 ppm, the critical value. This process allowed for 8 cycles of feeding and regenerating the carboxylic column without exceeding 2 ppm in the chelating column effluent.
· By combining the two resins, 60% more effluent could be treated compared to using the carboxylic resin alone. This method saved the expensive chelating resin for adsorbing calcium ions at very low concentrations (xCa < 4%), where it still had high retention capacities (yCa → 28%).
· Numerical simulations were conducted for each resin individually as well as for their combined use, revealing that the carboxylic resin's calcium capacity for the target fractions may have been underestimated in the isotherm measurements. By adjusting the K coefficient on the carboxylic resin, which signifies its calcium capacity, an accurate prediction of the chelating resin breakthrough in experimental conditions was achieved.