Decaffeinated coffee beans can be grown in various regions around the world, just like regular coffee beans. The decaffeination process typically takes place after the coffee beans have been harvested and before they are roasted. There are different methods of decaffeination, such as the Swiss Water Process, carbon dioxide (CO2) method, and solvent-based methods like ethyl acetate or methylene chloride.
Coffee beans used for decaffeination can come from coffee-growing regions like Colombia, Brazil, Ethiopia, Guatemala, Mexico, and many others. The specific origin of decaffeinated coffee beans can vary depending on the brand, roaster, and the method of decaffeination used.
So, decaffeinated coffee beans can be sourced from the same regions where regular coffee beans are grown, and the decaffeination process is typically done after the beans have been harvested.