Preparation and Application of New Demulsifier for Dirty Oil Sludge

In this study, DW1 as a novel commercial demulsifier was prepared by emulsion copolymerization. The demulsifier DW1 was characterized using five approaches, i.e. (1) FT-IR spectroscopy, (2) gel permeation chromatography (GPC), (3) 1H-NMR, (4) ^13C-NMR, and (5) particle size analysis The demulsification experiment using DW1 as a demulsification process was carried out with Xinjiang sludge as the target treatment object, and the sludge before and after treatment was analyzed by scanning electron microscopy.The results showed that the synthetic demulsifier DW1 had the following properties: (1) weight-average molecular weights (Mw) ranging from 454319 to 1388086, (2) number- average molecular weights (Mn) of 801880, (3) molecular weight distribution index of 1.73104, (4) D50 of 26.00 μm, (5) average particle size of 25.00 μm, (6) non- uniform particle size distribution, and (7) good enough stability. The demulsification experiment showed that the oil removal rate of DW1 on a Xinjiang oil field could reach 99.55%.