The vapor is collected and passed through coils of copper tubing, where it cools and condenses as a liquid once again. The separation of salt from seawater using evaporating pools is another. But water ice can also be converted directly into water vapor without melting, at low pressure. Snow on mountain peaks disappears without moistening the soil. Separation by sublimation is sometimes called 'freeze drying'.
Instant coffee is manufactured by freeze drying.
Fresh coffee is frozen to form a mixture of ice and coffee crystals. The pressure over the mixture is lowered so that the ice sublimates, leaving the coffee crystals behind. Sign up for a free monthly newsletter describing updates, new features, and changes on this site.