Regeneration and Recycling of Spent Bleaching Earth
Spent bleaching earth, a solid waste from the edible oil refining industry with unpleasant odor, usually consists of clay minerals and residual oil. The residual oil can be rapidly oxidized to the point of spontaneous autoignition due to the autocatalysis action of clay minerals, so that the direct discard and landfill of spent bleaching earth result in the fire danger and environmental pollution. In order to minimize the risk of pollution, much effort has been devoted to explore the feasible approach for recycling the spent bleaching earth. Therefore, this chapter reviewed the recent research progress in regeneration and recycle of spent bleaching earth by summarizing the comprehensive literatures and our group’s latest research achievements.
This work is supported by the “863” Project of the Ministry of Science and Technology, PR China (No. 2013AA032003), the National Natural Science Foundation of China (No. 21377135 and 41601303), and the Youth Innovation Promotion Association CAS (No. 2017458).
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