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Froggiebuns OP t1_jd6534n wrote

Reply to comment by ECatPlay in Can you extract a fully concentrated liquid out of an ice cube (like Coca Cola) until there's almost no water left? by Froggiebuns

This makes me happy to hear it's a legitimate process! I'm not crazy yay!

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[deleted] t1_jd68jmc wrote

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SleepWouldBeNice t1_jd891nb wrote

It’s how the Native North Americans made maple sugar/syrup before the Europeans brought cast iron pots: they’d leave the sap overnight, in the morning, the water component had frozen and the ice could be removed leaving the higher-sugar content sap in place. Repeat for a few days and you have syrup. They also placed hot rocks in the liquid during the day which helped steam out some of the water.

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Bbrhuft t1_jdg7vsl wrote

The most interesting effect is isotopic fractionation. Heavy water, has a melting point of 3.7 Celsius.

If you repeat the process of removing the melt from ice many times, you'll make heavy water ice.

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