Development and Evaluation of a Columnar Ion Exchange System Using Microencapsulated Magnetic Resin.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO
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A unique method using 15-20 micron diameter magnetic ion exchange resin in columnar operation was demonstrated. A barium feritte powder 2 microns in diameter was encapsulated within an experimental synthetic strong-acid ion exchange resin, sulfonated, and magnetized using a laboratory magnet of 15,000 Gauss. A procedure was developed whereby the magnetized resin was allowed to attach itself to a stainless steel wool matrix, which loosely filled the column. By maintaining a high void volume throughout the bed, pressure drop was maintained at acceptable values. Performance of the system was evaluated by monitoring variations in breakthrough capacity, as regeneration flow rates and contact times, and softening flow rates and contact times were varied. Sodium chloride was used to regenerate the column in an upflow mode, countercurrent to the service cycle. The ion exchange System evolved in these studies is the first known system to utilize fine mesh ion exchange resin in columnar operation and take advantage of the superior properties made possible by small diameter resin.
- Industrial Chemistry and Chemical Processing