Coffee: It leaves some people feeling fit and refreshed; in others, it makes their heart race. Scientists have developed several decaffeination processes to allow even people who react badly to caffeine to enjoy a cup of the “black brew.” Kurt Zosel from the Max Planck Institute for Coal Research in Mülheim an der Ruhr came across one of these processes quite by chance in 1967. A successful researchers: As early as the 1960s, Kurt Zosel from the Max Planck Institute for Coal Research began to use supercritical gases to separate substances. He achieved his first success with the decaffeination of coffee. © MPG The average German drinks 150 liters of coffee every year, and many legends surround the history of our favorite drink. One of these is about a memorable encounter that is supposed to have occurred on October 3, 1819 in Jena. On this day, chemist Friedlieb Ferdinand Runge paid a visit to poet and privy councillor Johann Wolfgang von Goethe, who had a task for him that was of personal interest to himself. With the words “You can use these in your experiments,” the poet handed Runge a small package of coffee beans he had received from Greece. The
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