What is demineralized water? What uses? How to make it?


Water, this essential substance for our body. The one that we are lucky to see flowing clear and running from our tap, that of the sea a bit salty, but also that polluted in some places. No matter where we find it, it is never completely pure, in the sense that there are always minerals, trace elements and salts there. This is however different in the case of demineralized water. How exactly is demineralized water produced and what exactly is the difference from distilled water? What is its use? Is it drinkable? Let’s clarify all the answers to all these questions in the following lines.

What exactly is demineralized water?

Deionized water is water from which all ions and salts have been removed. Deionized water is nothing more than water without minerals. This process fundamentally changes the properties of water, as the minerals in the liquid usually ensure a pH value of 7. If these elements are no longer available, then you are dealing with water that has an acidic pH of 5.

Typically, deionized water is obtained from tap water. The water is heated until it evaporates, then returned to its liquid state in a condenser. This removes the minerals and salts from it. This can be done more than once. To determine purity, the electrical conductivity of water is measured after demineralization: demineralized water has extremely low conductivity.

What is the difference from distilled water?

The terms “demineralized water” and “distilled water” are often mistakenly equated. Distilled water is water from which all salts have been removed. Salts are found in tap water as ions and cations. As its name suggests, it is water obtained by distillation. Basically the production method is similar. It is water completely free of ions, trace elements and all impurities. Distilled water is a little more expensive to produce than deionized water, which is why deionized water is used more frequently. Unlike distilled water, however, absolute sterility is not guaranteed.

Is demineralized water drinkable?

Have you probably ever wondered if this water is safe to drink? And the answer to this question is very clear: yes. After all, it’s normal tap water. The only difference is that the water no longer contains minerals and therefore can no longer help your mineral balance. This demineralized water is not necessarily healthy, but neither is it unhealthy in normal amounts. It should be noted, however, that many scientists warn against the exclusive use of these waters. If you constantly consume deionized water, your body may become deficient, especially in potassium and sodium. So long term consumption is not recommended.

What are the uses of demineralized water?

In a household, demineralized water can be used for several purposes. The best known remains the use in irons. Using deionized water is the only way to avoid lime residue on your shirts, blouses and ties. If you have a boiler, this water is also used in the system during its maintenance. Demineralized water is used in car batteries. In the field, it is used by car washing and cleaning companies. These stations use it to avoid unsightly marks on the bodywork. Deionized water can also be used to clean valuable materials such as pearls or mother-of-pearl.

How to make demineralized water?

If you need demineralized water, you can just collect rainwater. Rainwater is already demineralized because when it falls, it does not absorb any minerals. Likewise, if you have a condenser dryer, the collected water no longer contains minerals. So you can ideally use it in your steam iron. The production of demineralized water is not very expensive. All you need is a saucepan with a lid, a bowl and a few ice cubes. Fill your pot halfway with tap water and let the bowl float in the water. It should not touch the bottom of your container. As soon as the water is hot, place the lid upside down on your pot so that the trough is facing up. Now place the ice cubes in the hollow of the lid. The water vapor rises in the saucepan, condenses on the cold lid and then drains into the bowl. This gives you demineralized water.

In summary

Demineralization of water brings you certain advantages, because many devices that accompany us in our everyday life require demineralized water. When ironing, for example, you can protect your clothes from annoying lime stains. The water is also drinkable as it is only treated tap water. However, it should be noted that demineralized water does not restore the body’s mineral balance or can even damage it if it is consumed continuously.