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在海盐生产中,大约每生产一吨氯化钠也就产生一吨的苦卤(它的浓度一般在30°Be′以上)。其中除了NaCl以外,还有大量的镁、钾、硫酸根,这几种物质都有很大的实际用途。因此,如何最经济的利用苦卤中的这些资源问题自然是很重要的。有关这方面的工作看来是不少,许多地方都有这方面工作的报告或介绍,可是有关这方面的原始资料却并不多,并且不全面,在这方面还有一些资料需要补充。
In sea salt production, about a tonne of bittern (which concentration is generally above 30 ° Be ’) is produced for every ton of sodium chloride produced. In addition to NaCl, there are a lot of magnesium, potassium, sulfate, these substances have great practical use. Therefore, it is of course very important how to make the most economical use of these resources in bittern. There seems to be a lot of work in this area. Many places have reports or presentations of their work in this area. However, there are not many original sources of information in this respect. They are not comprehensive and there is some additional information to be added in this regard.