How is instant coffee made?

Question

BlackTom AI · Accepted Answer

To analyze how instant coffee is typically produced, we need to examine the drying methods used to turn brewed coffee into a stable, instant form.
Option: 'Either spray drying or pod drying' — This is misleading. Pod drying is not a standard or common method for producing instant coffee; pods are primarily used for brewing coffee, not for drying brewed coffee into an instant form. So this option is incorrect.
Option: 'Either freeze drying or pod drying' — Freeze drying is a valid method, but pairing it with pod drying is inaccurate for instant coffee production. As with the previous option, including pod drying makes this statement incorrect because pod drying is not used for making instant coffee.
Option: 'Spray drying – where concentrated brew is sprayed and the water evaporates off' — This describes a well-established method for making instant coffee. In spray drying, a concentrated coffee extract is sprayed into a hot chamber, and the water evaporates rapidly, leaving behind dry coffee particles. This is a correct description of one of the main production processes.
Option: 'Pod drying – where coffee grounds are put into a pod to dry so that it can be brewed instantly in a pod machine' — This again describes a process unrelated to producing instant coffee granules. Pods are used for brewing, not for drying to create instant coffee; thus this option is incorrect.
Option: 'Either spray drying or freeze drying' — This is accurate as both spray drying and freeze drying are standard methods used to produce instant coffee from brewed extract. Spray drying yields powder quickly, while freeze drying preserves aroma and flavor by sublimating frozen water under vacuum. This option is correct.
Option: 'Freeze drying – where the brewed coffee is frozen and then a vacuum sublimates off water' — This is a correct description of the freeze-drying process used for instant coffee production. The water sublimates under reduced pressure, leaving porous coffee granules with strong aroma. This option is correct.
Option: 'All three: freeze drying, spray drying, or pod drying' — Since pod drying is not a recognized method for creating instant coffee, this option is incorrect.
In summary, the valid production methods among the choices are spray drying and freeze drying, while pod drying is not used for making instant coffee. The incorrect options either mischaracterize the process or include an option (pod drying) that does not apply to instant coffee production.

ECH 001Y A01-A24 SQ 2025 Pre-Lab 12 Quiz (Second Design Trials: Scaling Up)

How is instant coffee made?

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