Method for extracting metal elements from seawater

1. After seawater evaporates, only the main salts such as NaCl, CaCl2, MgCl2 and KCl remain (there may be impurities, but there are few).

2. Electrolyze salt into sodium, calcium, potassium and chlorine by electrolytic wet salt solution method.

3. Using different boiling points of metals, sodium, calcium and potassium are separated by temperature-controlled distillation.