Extract caffine from coffee beans / tea leaves

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Discussion Overview

The discussion centers around methods for extracting caffeine from coffee beans and tea leaves. Participants explore various techniques, including the use of solvents and water, while seeking clarity on effective extraction processes.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about easy methods to extract caffeine and requests a step-by-step guide.
  • Another participant suggests using an organic solvent, specifically dichloromethane (DCM), along with sodium carbonate (NaCO3) for extraction, followed by evaporation to isolate caffeine.
  • A different participant notes that dichloromethane was historically used for industrial caffeine extraction but mentions health risks associated with this method, leading to its decline in use.
  • One participant humorously suggests simply drinking coffee as a means to obtain caffeine.
  • Another participant describes a method involving superheated steam passing through finely ground coffee, referring to it as "espresso."

Areas of Agreement / Disagreement

Participants present multiple methods for caffeine extraction, with no consensus on a single best approach. Some methods are contested based on health considerations and practicality.

Contextual Notes

There are unresolved assumptions regarding the safety and efficacy of the proposed methods, as well as the specific conditions required for successful extraction.

phr34k
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i was wonderin in there was an eaisy way to extract caffeine from coffee or tea. i read aroun and there was 3 methods of doing this one of which involved water, but I am not too sure how i can get the caffine by it self?

can anyone give me a step-by-step?

thanks
phr
 
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I imagine all you would have to do is an extraction followed up by an evaporation of an organic solvent. I would probably try taking some coffee and add some NaCO3 followed by adding some DCM. after swirling the solution I would funnel off the bottom layer, which should be the DCM layer and which should contain the caffeine. I would then take the DCM layer and dry it over some magnesium sulfate to get all the rest of the water out. Then after you evaporate off the DCM you should have isolated some caffeine.
 
Yes, dichloromethane was used industrially to extract caffine from coffee to make it decafinated. This method is no longer used because of health risks.
 
Drink it...
 
The water one you're talking about is passing superheated steam through finely ground coffee. The common name for this is "espresso".
 

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