Home > News > Content
Methylene chloride used in the decaf process for coffee
Jan 03, 2017

Methylene chloride used in the decaf process for coffee

Coffee is a delicious drink that we may want at any time, but the effects of caffeine can be an inconvenient when, for example, we wish to have coffee after dinner, or if we have high blood pressure.
Luckily, decaffeinated coffee overcomes this obstacle and avoids us struggling to get to sleep. But how can caffeine be removed from coffee?
In this post we’ll quickly explain the three processes through which caffeine is removed from coffee, although these same processes can also be applied to tea or cocoa beans.
Let’s see, then.

Swiss Water Process
This treatment, originally by the company of the same name, consists in immersing the coffee beans in hot water saturated with coffee flavour. This way, the caffeine dissolves without the coffee losing its flavour at any time. This is the mechanism that best preserves its properties, and it is also the one that most respects its flavour and the consumer’s health.
It is also the mechanism that we use at Cafès Pont for our Decaf coffee, the finest of the decaf products we offer.

Treatment by Carbon Dioxide
Thanks to high pressure drums, carbon dioxide is circulated between coffee beans. Because of the chemical and physical characteristics of carbon dioxide, it acquires the viscous properties of a liquid and the diffusion of a gas when it comes into contact with high pressure of about 250-300 atmospheres. Thanks to this, it manages to enter the coffee beans and dissolve the caffeine they contain.
Treatment by Methylene Chloride 
The third treatment involves soaking the coffee beans in methylene chloride, a chemical solvent, until their surface becomes porous. This way, the chloride enters the beans and dissolves the caffeine.
In all three cases, the coffee beans are then dried with hot air; and although the result is the same, the three processes each offer a different quality.
The treatment by methylene chloride is normally used as it is the best value for money. However, the Swiss Water process best preserves the essence and properties of the coffee.

If you want to purchase Methylene Chloride , pls contact Alex (alex@gpcchem.com)