초록

The invention relates to a method and a device for converting a preferably weak acid ion-exchange material from the H form into the Ca form, according to which the ion-exchange material is brought into contact with an aqueous, preferably saturated, Ca(OH)2(calcium hydroxide) solution.

대표청구항 ▼

1. A method for converting a weakly acid ion exchanger material from the H form into the Ca form, wherein the ion exchanger material is brought into contact with an aqueous, saturated calcium hydroxide Ca(OH)2solution continuously being in contact with still-undissolved calcium hydroxide. 2. The met

1. A method for converting a weakly acid ion exchanger material from the H form into the Ca form, wherein the ion exchanger material is brought into contact with an aqueous, saturated calcium hydroxide Ca(OH)2solution continuously being in contact with still-undissolved calcium hydroxide. 2. The method according to claim 1, wherein the ion exchanger material is poured into a tank for the calcium hydroxide solution, the undissolved calcium hydroxide being provided as sedimentary deposit. 3. The method according to claim 1, wherein the calcium hydroxide solution is kept in motion during the contact with the ion exchanger material. 4. The method according to claim 1, wherein the calcium hydroxide solution is raised to a higher temperature above 40° C. 5. The method according to claim 1, wherein the converted ion exchanger material is dried. 6. The method according to claim 5, wherein the converted ion exchanger material is dried in a rotary drying oven or fluid-bed drying oven. 7. The method according to claim 1, wherein the ion exchanger material is rinsed with rinsing water after the conversion and the pH value of the discharging rinsing water is reduced by blowing in air or CO2and/or adding acid, so that it can be introduced into the drains, or the water whose pH value has been reduced is re-used as rinsing water after sedimentation of Ca(OH)2or lime colloids in a treatment tank or their separation in a hydrocyclone and pumped back into the conversion tank for rinsing.