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COMPOSITION CONTAINING MODIFIED RED MUD WITH LOW CONTENT OF CHROMATES, AND A METHOD FOR PRODUCTION THEREOF
COMPOSITION CONTAINING MODIFIED RED MUD WITH LOW CONTENT OF CHROMATES, AND A METHOD FOR PRODUCTION THEREOF
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机译:含有低含量铬酸盐的改性红色泥浆的组合物及其生产方法
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摘要
The invention relates to a composition which contains modified chromate-deficient red mud, comprising a mineral composition of—10 to 50 wt. % of iron compounds,—12 to 35 wt. % of aluminum compounds,—5 to 17 wt. % of silicon compounds,—2 to 10 wt. % of titanium dioxide,—0.5 to 6 wt. % of calcium compounds,—0 to 1 ppm of chromium (VI) compounds, and—optionally additional unavoidable impurities. The composition, in particular the modified chromate-deficient red mud, contains a poorly soluble reducing agent for Cr(VI). In this manner, an inexpensive chemical composition is provided in particular as an iteratively functioning long-term adsorbent for pollutants in liquid, gaseous, and solid milieu. The invention further relates to a method for producing same and to uses thereof.
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