How to brew a cup of decaf, decaf is only available in Starbucks?

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Coffee can stimulate the brain and increase alertness, but these effects may also be a drawback of coffee for some people.

In order to solve this problem, people continue to develop ways to reduce caffeine.

Origin and development

Friedrich, a German chemist. Fisher Dinan. Friedlieb Ferdinand Runge discovered caffeine in 1898. Since the end of the 19th century, scientists have been studying how to inhibit the effect of caffeine in order to remove caffeine and retain other substances in coffee. In 1903, Rosay, the coffee merchant. Ludwig Roselius commercialized decaffeinated beans for the first time; the technology matured after continuous improvement. However, the decaffeinated process starts with raw coffee beans, and decaffeinated coffee beans are not easy to bake and their aroma is greatly reduced.

Chemical solvent extraction (traditional method)

Caffeine is extracted by chemical solvent, which is divided into direct and indirect methods.

Coffee beans do not come into direct contact with solvents.

Water extraction or Swiss water treatment (SWP)

This method was invented in 1933 without the use of chemical solvents and was commercialized in the ○ era under the registered trademark The Swiss Water ®Process.

Carbon dioxide high pressure extraction

This method is relatively new and expensive. When the carbon dioxide is heated to 31 ℃ and pressurized to 200 bar, the carbon dioxide becomes almost as dense as the liquid, becoming the so-called "supercritical fluid carbon dioxide".

Provenance "my Coffee Life proposal" / Sancai Culture publication