Inorganic Chemicals Industry ›› 2020, Vol. 52 ›› Issue (5): 11-17.doi: 10.11962/1006-4990.2019-0336

• Reviews and Special Topics • Previous Articles     Next Articles

Present status of resource utilization of by-product green vitriol from titanium dioxide production by sulfuric acid method

Ji Lichun   

  1. College of Chemical Engineering,Inner Mongolia University of Technology,Hohhot,010051,China
  • Received:2019-11-17 Online:2020-05-10 Published:2020-05-21

Abstract:

Green vitriol is a solid by-product generated from production of titanium dioxide by sulfuric acid method.It has been reported that total production of green vitriol from titanium dioxide industry was more than 7×10 7 t in 2017,and the annual growth rate of green vitriol exceeded 10% in China,which has been restricted the sustainable development of titanium dioxide produced by sulfuric acid method.Presently,only a few part of green vitriol is reused,and the rest is still disposed of as industrial solid waste,which not only caused great waste of sulfur and iron resource,but also resulted in severe environmental pollution.In order to reduce the environmental pollution and enhance the value of green vitriol resources,a lot of research work on resource utilization of green vitriol has been done by domestic and foreign scholars in recent years.The current situation of resource utilization of by-product green vitriol in various fields,such as water treatment,agriculture,pigments,electrode materials,titanates,nano-sized iron oxide and producing acid by blending roasting technology,was systematically analyzed.It proposed that the preparation of nano-sized iron oxide is a feasible way for the resource utilization of by-product green vitriol.

Key words: green vitriol, by-product, resource utilization, titanium production

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