Coffee in the morning serves as a classic “wake-up” for most people. But if you can’t tolerate the caffeine in your favorite hot drink, decaffeinated coffee can help so that nobody has to forego coffee enjoyment.
Beginning of the 20th century: A man from Bremen invents decaffeinated coffee
Ludwig Roselius, the founder of the well-known coffee brand “Kaffee HAG” produced decaffeinated coffee for the first time in 1903. The reason was extremely sad: his father had died shortly before and Roselius attributed this not least to his father’s immense coffee and caffeine consumption. However, the first decaffeinated coffee was not necessarily good for your health. Because after the coffee beans had swollen in salt water, Roselius removed the caffeine from them with the help of benzene. However, benzene is a substance that is now considered carcinogenic, so the so-called Roselius method is no longer used today.
The Swiss water process: A process without chemicals
The Swiss water process works without any harmful chemicals, but has other disadvantages. This process works on the principle of saturation: First, the coffee beans are placed in water until all soluble components have passed into the water. This water mixture is then passed through a special filter to separate the caffeine dissolved in the water from the rest. The decaffeinated water will now continue to be used. In the next step, coffee beans are again added to the water, which now contains all coffee components apart from the caffeine, and allowed to swell in it. Now the principle of saturation comes into play: Since the water contains all the components of the bean, just not the caffeine, only the caffeine can be released into the water. So the caffeine is removed from the beans by the water and they are decaffeinated in this way. However, this method is very time-consuming and also extremely wasteful, since you need a lot of coffee beans to saturate the water, which you then simply throw away. This method is therefore rarely used today.
Decaffeinated coffee thanks to solvents
One of today’s most popular methods of decaffeinating coffee relies on solvents. Here, too, the first step is to let the coffee beans swell to make them ready for the solvents. If these are then used, patience is required: the coffee beans usually have to be treated with solvents for at least ten hours in order to release their caffeine. But the use of solvents is not without controversy. To date, it has not been conclusively clarified whether the substances used are dangerous to health or not. Indeed, there seems to be evidence that at least one solvent, dichloromethane, is potentially carcinogenic.
