Method for producing decaffeinated raw coffee beans, decaffeinated roasted coffee beans or preparations produced therefrom, corresponding decaffeinated raw coffee beans, decaffeinated roasted coffee beans and preparation produced therefrom, corresponding uses and corresponding systems

A process for producing decaffeinated green coffee beans or decaffeinated roasted coffee beans, comprising the following steps:

• (a-v) optionally presoaking green coffee beans with a liquid for swelling green coffee beans to obtain presoaked green coffee beans,
• (b) subjecting green coffee beans or the presoaked green coffee beans to pulsed electric field (PEF) treatment to obtain PEF-treated green coffee beans, wherein the PEF treatment comprises applying to the green coffee beans or the presoaked green coffee beans a pulse field strength of at least 0.2 kV/cm,
• (c) extracting of caffeine from the PEF-treated green coffee beans using an extraction liquid to obtain decaffeinated, PEF-treated green coffee beans or decaffeinated, PEF-treated, presoaked green coffee beans, and
• (e) optionally roasting the decaffeinated, PEF-treated green coffee beans or decaffeinated, PEF-treated, presoaked green coffee beans to obtain decaffeinated roasted coffee beans.