Patent ID: 9115317
Filing Date: 2015-08-25
Classification: B01D,C02F,C10G,C10L,C11B

Abstract:
1. A method for the recovery of oil from an aqueous solution containing oil and solids, the method comprising: adjusting an oil- and solids-containing aqueous solution to an acidic pH, separating an oil- and solids-containing fraction from the acidic aqueous solution with a separation agent which comprises particulate matter that is hydrophilic or assumes a hydrophilic character in response to water, wherein said separation agent is sand, having a grain size of 0.05 to 4 mm, recovering the oil- and solids-containing fraction separated by means of said separation agent, extracting oil away from solids with a water-insoluble extraction agent, and recovering the oil-containing water-insoluble extraction agent.