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The Decaffeination of Coffee. Every day, millions of people around the world drink
coffee. ... Bibliography C0-2 Decaffeination Method for Coffee- SN Katz. ...
... between cancer and the chemicals used to extract the caffeine from coffee and tea. ...
Since the decaffeination process removes 97 to 99 percent of the caffeine, a ...
Submitted by cosmologist7 on June 5, 2006
Category: Science
Words: 766 | Pages: 4
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Every day, millions of people around the world drink coffee. While most enjoy it in its natural state, as a mixture used without separation, many prefer ‘decaf’, as it does not provide them with unnecessary energy, and some cannot have excess amounts of the stimulant as it causes adverse effects. Therefore, the process of decaffeination is very important in today’s society.
There are various ways in which coffee can be decaffeinated. The solubility of caffeine allows it to be removed easily using solvents.
1. The Carbon Dioxide Method
This method was developed by the Kurt Zosel. For a very long time, toxic compounds such as Chloroform and benzene had been used to decaffeinate coffee. The carbon dioxide method, however, does not use any chemicals and allows the coffee to retain the proteins and carbohydrates that give it its flavour.
The method uses two natural elements, pure water and carbon dioxide. The carbon dioxide is between a gas and a liquid (‘supercritical’) and acts as a solvent.
Firstly, the beans (in their green stage) are mixed with pure water, which causes them to expand to double their original size and opens their pores.
The caffeine molecules are then able to move freely. Carbon dioxide is added to the pure water, which absorbs all the mobile caffeine molecules.
After this process, the beans are dried naturally.
This diagram illustrates this method.
2. Swiss Water Process
In Switzerland in the early 1930s, it was discovered that water could be used to decaffeinate coffee. Forty years later, when the technology became available, the discovery was able to be put into practice. In 1989, the only SWISS WATER® decaffeination facility in the world was built near Vancouver, Canada, a region well-known for its pure, high-quality water.
In this process, a batch of coffee beans is first soaked in water, which...
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