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A novel ‘‘green’’ solvent to deeply purify quartz sand with high yields: A case study
Xiaoxia Li,Tihai Li,Jianxiong Gao,Houquan Huang,Linbo Li,Jingsheng Li 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
A novel ‘‘green’’ solvent for removing iron and aluminum impurities simultaneously from quartz sandwas presented to replace the outdated industrial strong acids. The solvent is a ‘‘green’’ mixturecomprised nontoxic, renewable acids and a very diluted hydrochloric acid. The new solvent cansignificantly reduce the pollution caused by residual acids and remain the high efficiency in removingimpurities and is harmless to the target product as well. The final optimum removing rate was up to79.1% and 42.3% respectively if its leached residue was washed, then leached again in a 4 g/l Na2CO3solution under ultrasound for 25 min.