If freezing salt water produces freshwater ice, why is desalinization such a difficult problem?

https://www.youtube.com/watch?v=c2wafIzuvlI

I was watching the above minute physics video, and they indicated in a brief one sentence line that saltwater freezes into freshwater ice. That got me thinking.

Under what circumstances could you actually freeze salt into ice? To make salt ice?

  • Mr. Semi@lemmy.world
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    2 months ago

    Air dry it for table salt?

    It’s essentially how we make sea salt, just gather seawater in ponds and let it evaporate.