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为了使带色的液体脱色并除去杂质,一般常使用各种的活性炭。过去用的主要是血炭、骨炭等;现在利用各种的树炭,它们的活性并不亚於那些动物炭。活性炭首先吸着的是分子量较大的物质,而在制品中的杂质主要是一些色素和膠状物,它们的分子量一般都是较大的,这正是活性炭能广泛被应用的主要根据。因此想要除去的杂质如果是低分子量的物质,
In order to decolorize a colored liquid and remove impurities, various activated carbons are generally used. In the past, blood charcoal, bone charcoal, etc. were mainly used; now various kinds of charcoal are used, and their activity is no less than that of animal charcoal. Activated carbon is the first to absorb the larger molecular weight substances, while the impurities in the products are mainly some pigments and gels, and their molecular weight is generally larger, which is the main basis for activated carbon can be widely used. So if the impurity you want to remove is a low molecular weight material,