Coffee Decaffeination Process
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Coffee Decaffeination Process
How is Coffee Decaffeinated?

The secret of deaf coffee lies in removing the caffeine from green coffee beans. Green coffee beans are unroasted fresh coffee beans. Currently, there are three different types of methods used to remove caffeine.

The first method is water decaffeination. Water decaffeination is the process of dipping coffee beans into a hot tub of water which is saturated with coffee flavor. This allows the caffeine to be dissolved from the coffee beans into the water while the coffee flavor remains in the coffee beans.

The second method involves the use of chemicals such as methylene chloride or ethyl acetate which are able to attract and extract the caffeine from the coffee beans.

The last method is known as carbon dioxide decaffeination which is also the most expensive method for removing caffeine.

These processing methods all share the basic stages of;
  • Swelling the green coffee beans with water or steam in order to make the caffeine available for extraction.
  • Extracting the caffeine from the beans.
  • Steam stripping to remove all solvent residues from the beans (when applied) / regenerating adsorbents (when applied).
  • Drying the decaffeinated coffee beans back to their normal moisture content.
  • Under carefully controlled process conditions, such as temperature, pressure and time, the caffeine extraction step is based on physical phase transport mechanisms. Due to the difference in concentration, the caffeine is diffused out of the cell structure into solvent surrounding the bean until the concentration of caffeine is the same inside and outside the beans.
Caffeine Content

Caffeine Content

Item Caffeine Content
Robusta coffee (drip brewed) 140–200 mg caffeine per 6 ounce average cup
Arabica coffee (drip brewed) 75–130 mg average 6 ounce cup
Arabica/Excelsa blend coffee (drip brewed) 40–60 mg average 6 ounce cup
Espresso (typical serving) 30–50 mg average 1 ounce cup
Instant coffee 40–100 mg average 6 ounce cup
97% decaf coffee 3–6 mg caffeine per 6-7 ounces average cup
99.92% Euro decaf standard coffee 8–16 mg caffeine per 6-7 ounces average cup
Hot Cocoa 10–15 mg caffeine per 6-7 ounce cup
Dark chocolate candy bar 50–100 mg caffeine per 6 ounce bar
Milk chocolate candy bar 30–50 mg caffeine per 6 ounce bar
Coke, Pepsi, Mountain Dew Soda 20–26 mg caffeine per 6-7 ounce drink
Green tea (brewed) 12–30 mg per 6-7 ounce average cup
Black tea (brewed) 40–60 mg per 6-7 ounce average cup

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