用于脱色的凹凸棒石、膨润土和其他粘土,工业上统称为“白土”或“漂白土”。有的原土可直接用于脱色,但大部分需经化学处理,工业上称为“活化”,以提高白土的脱色能力。 白土在工业上应用很广,主要用于油脂产品、塑料、树脂等的脱色,需量很大。白土价格约550元一吨,国际市场上也很走俏。 Attapulgite, bentonite and other clays used for bleaching are collectively referred to in the industry as “clay” or “bleaching earth.” Some of the original soil can be used directly for decolorization, but most of them require chemical treatment, the industry called “activated” to enhance the decolorization capacity of clay. Clay widely used in industry, mainly for grease products, plastics, resins, such as decolorization, in great demand. White clay price of about 550 yuan a ton, the international market is also very popular.