"Sublimation" has slightly different meanings, albeit related ones, in psychology and chemistry.
In psychology, sublimation is the act, conscious or unconscious, of taking a form of energy and redirecting that energy toward a constructive purpose. This might be sexual energy or anger, for example, that one cannot express for some reason. Have you every been angry or dissatisfied and engaged in a cleaning spree? You have redirected that energy. I believe this concept originated with Freud, but perhaps a psychologist can speak to that.
In chemistry, and other sciences, sublimation is the act of purifying or refining some substance. One act that comes to mind is that of taking plasma from blood. I would imagine that is an act of sublimation.
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