Coffee Oil Extraction Methods: A Review

Area of Science:

• Food Science
• Cosmetic Science
• Chemical Engineering

Background:

• Coffee oils, from green and roasted beans, are rich in bioactive compounds like linoleic acid, cafestol, and kahweol.
• These compounds present significant potential for applications in the food and cosmetic industries.
• The industrialization of coffee oils is a growing sector in Brazilian agribusiness, driven by demand in cosmetics, pharmaceuticals, and food products.

Purpose of the Study:

• To provide an overview of the most common oil extraction techniques for coffee beans.
• To analyze the influence of different extraction methods on the final oil composition.
• To highlight extraction processes for both green and roasted coffee oils, emphasizing the preservation of bioactive properties.

Main Methods:

• Review of prevalent coffee oil extraction techniques including pressing, Soxhlet, microwave, and supercritical fluid extraction (SFE).
• Comparison of laboratory-scale (Soxhlet) versus industrial-scale (pressing) applications.
• Evaluation of SFE, noting its environmental advantages.

Main Results:

• Pressing is the dominant industrial method, while Soxhlet is common in laboratory settings.
• Supercritical fluid extraction is recognized for its environmentally friendly approach.
• Green coffee oil extraction is of particular interest due to its desirable bioactive compounds.

Conclusions:

• Various extraction techniques significantly impact coffee oil composition.
• Pressing and SFE are key methods for industrial and environmentally conscious coffee oil production, respectively.
• Further research into green coffee oil extraction is crucial for preserving its valuable bioactive properties for diverse industrial applications.