The ion exchange technologies expediency to obtain purified water was established. The necessary stage of work with commercial ion exchangers was their treatment with 20-25% sodium chloride solution to prevent grains cracking and some organic impurities "salting out" from the ion exchangers matrix. By comparing total water hardness change it was found that the most effective stage of purification is FMA, loaded with Dowex MB 50. The softening reached degree was 90% for the volume of purified water 215 dm3.
