Aroma-Retaining Soluble Coffee via Whole Bean Contact
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Solution Overview
Problem
Existing methods for producing soluble coffee particles fail to replicate the aroma of freshly extracted coffee, with previous techniques either providing low aroma content or requiring energy-intensive processes and the addition of foreign substances.
Innovation Solution
A process involving mixing soluble coffee particles with whole roast coffee beans for at least two days to transfer and retain the characteristic coffee aroma, particularly 2-methylpyrazine, while maintaining a low oil content and avoiding insoluble residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If soluble coffee granules are mixed with freshly roasted ground coffee for aroma transfer, then coffee aroma is imparted to the soluble coffee, but the roast and ground coffee is difficult to separate from the soluble coffee particles
Solution Approach 1:
The invention segments the coffee processing into two distinct forms: whole roasted coffee beans for aroma transfer and ground soluble coffee particles for dissolution. By using whole beans rather than ground coffee for the aroma transfer step, the insoluble bean material can be easily separated from the soluble coffee particles after aroma transfer, resolving the separation difficulty while maintaining effective aroma imparting.
Solution Approach 2:
The invention uses whole roasted coffee beans as an intermediary medium to transfer aroma to soluble coffee particles. The whole beans serve as a temporary carrier of aromatic compounds that can be easily removed after transfer, unlike ground coffee which would mix with and contaminate the soluble particles. This intermediary approach enables effective aroma transfer followed by clean separation.
2Ease of manufacture
If the intimate contact time between soluble coffee granules and freshly roasted coffee is extended to 24 hours, then aroma transfer is improved, but the process becomes time-consuming and inefficient
Solution Approach 1:
The invention changes the physical state parameter of the roasted coffee from ground to whole beans, which fundamentally alters the aroma transfer kinetics. This parameter change enables significantly faster aroma transfer - achieving effective aroma imparting in minutes rather than requiring 24 hours of contact time. The whole bean form provides larger surface area exposure and more efficient volatile compound transfer, dramatically improving productivity while maintaining or enhancing aroma transfer effectiveness.
3Reliability
If oily substance is added to instant coffee to improve aroma retention, then aroma retention is enhanced, but the appearance of the liquid coffee is changed and foreign substances are added
Solution Approach 1:
The invention enables the soluble coffee particles to retain aroma through their own inherent properties rather than requiring external additives like oil. By using whole roasted coffee beans for aroma transfer, the coffee particles naturally incorporate aromatic compounds and associated compounds that provide self-retention capability. This self-service approach maintains product purity, preserves the natural appearance of the reconstituted coffee, and avoids introducing foreign substances while still achieving improved aroma retention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process effectively imparts and retains a fresh coffee aroma in soluble coffee particles, enhancing the aroma retention during storage and open shelf-life without the need for additional substances or energy-intensive methods.
Implementation Method 1
mixing the soluble coffee particles with roast whole coffee beans, holding the mixture for at least two days
Data Source
AI summary
Disclosed is a novel instant coffee comprising aromatized soluble particles and a method of aromatizing soluble coffee particles. The soluble coffee particles are mixed with roast whole beans, and the mixture is held for at least two days. The result is aromatized soluble coffee particles, as evidenced by the presence of relatively high amounts of 2-methylpyrazine in instant coffee comprising said particles. The instant coffee has a favorable content in aroma components, yet with a low oil content.