How to decaffeniate coffee
The most widespread denitrification method strips caffeine from coffee beams using a solvent such as ethyl acetate (which can be derived from fruit and vegetables) or methylene chloride.
First the beans are soaked in hot water to make the caffeine soluble, then the solvent is circulated through the beans to draw the caffeine out. The beans are then rinsed and steamed to remove any traces of the solvent. Repeating these step removes up to 97 percent of caffeine.
Water processing uses a solutions of green coffee bean extract, which is rich in flavor compounds, as solvent. Caffeine is drawn into the solution and then filtered out by a bed of activated charcoal that has been treated to prevent flavour compounds from being absorbed. This process is repeated until 98% of the caffeine is removed.
A final method uses compressed carbondioxide to remove caffeine from beans
The most widespread denitrification method strips caffeine from coffee beams using a solvent such as ethyl acetate (which can be derived from fruit and vegetables) or methylene chloride.
First the beans are soaked in hot water to make the caffeine soluble, then the solvent is circulated through the beans to draw the caffeine out. The beans are then rinsed and steamed to remove any traces of the solvent. Repeating these step removes up to 97 percent of caffeine.
Water processing uses a solutions of green coffee bean extract, which is rich in flavor compounds, as solvent. Caffeine is drawn into the solution and then filtered out by a bed of activated charcoal that has been treated to prevent flavour compounds from being absorbed. This process is repeated until 98% of the caffeine is removed.
A final method uses compressed carbondioxide to remove caffeine from beans
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