Production of cold-pressed coffee bean oil and high-quality coffee bean press cake
You can use both roasted and unroasted coffee beans to produce coffee bean oil.
Depending on the variety, water content and roasted or unroasted state, the pre-treatment of the coffee beans before pressing differs. As a rule, they are gently heated to the pressing temperature and pressed using a mechanical press/oil press.
The result is cold-pressed coffee bean oil and a high-quality coffee bean press cake as a by-product.
However, the oil can also be obtained by extraction with dimethyl ether or petroleum ether. Prior to this, the seeds are often treated with tetrachloroethane to remove the wax they contain.
Valuable properties of coffee bean oil
Coffee bean oil from roasted beans is green to dark brown in color, while that from unroasted beans is light brown to yellow.
The oil from the roasted beans has the characteristic coffee smell, but that from the unroasted beans is almost odorless.
The melting point of coffee bean oil is around 8 – 9°C, which is why it is liquid at room temperature. However, due to its high palmitic acid content, it becomes solid again at a temperature of 3 to 11°C (solidification temperature: 3 – 11°C).
Coffee bean oil is composed of approx. 8 – 10% oleic acid, approx. 36 – 43% linoleic acid and approx. 35 – 42% palmitic acid. It also contains approx. 7 – 11% stearic acid, approx. 4 – 7% arachidic acid and approx. 4 – 7% behenic acid. In addition to this rich fatty spectrum, the oil also contains many volatile substances, especially sterols such as β-sitosterol, stigmasterol and campesterol.
The toxic effect of coffee bean oil was demonstrated in an experiment on laboratory rats with raw coffee bean oil.
The shelf life of this oil is about one year.
Use of coffee bean oil in various areas
Coffee bean oil in cosmetics
In the field of cosmetics, coffee bean oil finds its main application. It is suitable for the production of sunscreen products due to its particular composition (high degree of unsaponifiables, water-like density and sun-protective properties). It is also included in some moisturizers and body lotions, as it can increase skin hydration due to its high content of phytosterols. Because of this moisturizing property, it is also used, especially in India, for the production of soaps.
Coffee bean oil in the chemical industry
On the one hand, coffee bean oil is used in the chemical industry because of its high vitamin D content, and on the other hand, it is used to obtain sterols and sterol derivatives because of its high content of sterols.
We will be happy to advise you on this seed and show you options. Contact us
In addition to our own knowledge gained through pressing tests, the following sources were used to prepare this article:
- Öle, natürlich kaltgepresst, Basiswissen & Rezepte, Marcus Hartmann, Hädecke, 2008
- Heilende Öle, Pflanzenöle als Nahrungs- und Heilmittel, Neue Erkenntnisse, Günter Albert Ulmer Verlag Tuningen
- Lexikon der pflanzlichen Fette und Öle, Krist, Buchbauer, Klausberger, SpringerWienNewYork, 2008
- www.wikipedia.de
- en.wikipedia.org
