Abstract
Solvents screening experiments using a Soxhelt extractor were conducted to determine the best solvents for oil removal from spent bleaching clay. The solvents extracted oil in the following decreasing amount: methylethylketone > benzene‐ethanol mixture (1:1 by volume) > acetone > trichloroethylene = dichloromethane > chloroform > petroleum ether > benzene > n‐hexane > methanol. Four of the safest solvents, methylethylketone, acetone, petroleum ether and n‐Hexane were selected for further studies. Large scale treatment of spent clay with the selected solvents were conducted in a batch stirred reactor. The effect of solvent type, solvent to clay ratio (SCR), time of extraction and extent of mixing on the percentage of oil extracted (POE) were investigated. The corresponding optimum conditions for the four solvents were: extraction time time = 5 minutes, solvent to clay ratio = 4 to 5, extraction temperature = 25 °C (room temperature) and mixing rate = 150 to 200 RPM. The bleaching efficiency (compaerd to to fresh clay) of the clay deoiled by methylethylketone, acetone, petroleum ether and n‐hexane were 77%, 65%, 51% and 27%, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Environmental Science and Health, Part A
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
