| 摘要 |
<p>PURPOSE:To obtain a cooling medium, consisting of a salt of a polyvalent metal, having >=2 valence and capable of exhibiting a lower valence than that and sodium hydrogensulfite. CONSTITUTION:A cooling medium obtained by blending (A) a salt of a polyvalent metal, having at least >=2 valence and capable of exhibiting a lower valence than that, e.g. ferric chloride, ferric sulfate, etc., with (B) sodium hydrogensulfite capable of reducing the component (A) in the presence of water to form a metallic salt having a reduced valence.</p> |
