What is the concentration of the regeneration fluid for a hydrogen zeolite softener?

The concentration of the regeneration fluid for a hydrogen zeolite softener is typically within the range of 2% to 4% sulfuric acid. This concentration is effective because it provides sufficient acidity to regenerate the zeolite resin by proton exchange without being overly concentrated, which could damage the resin or lead to inefficient regeneration.

In the case of the hydrogen zeolite softener, sulfuric acid is preferred as it recharges the zeolite's hydrogen ions effectively, allowing the softener to perform its function of removing hardness from water. The use of this specific concentration helps ensure an optimal balance between effective regeneration and preserving the integrity of the softener system.

Other concentrations or types of acid, such as higher percentages or different acids, are less suitable for this application due to either their potential to degrade the resin, their insufficient ability to adequately regenerate the zeolite, or their incompatibility with the system.