| 摘要 |
<p>Additive compositions for sodium chloride are disclosed which minimize the tendency of certain aqueous salt brines to exhibit ''yellow brine'', or the presence of an unappealing yellow tinge or color. The additive compositions include from about 0.1 to 50 % by weight ethylenediaminetetraacetic acid or its salts and from about 99.9 to 50 % by weight alkali metal citrate, most preferably sodium citrate, or citric acid. The additives may be mixed with a preponderant quantity of sodium chloride to yield final salt mixtures, e.g., such mixtures contain from about 99.5 to 99.99 % by weight sodium chloride, and correspondingly from about 0.01 to 0.5 % by weight of additive.</p> |
