State Key Laboratory of Heavy Oil Processing,University of Petroleum,Beijing,102249,China;
Department of Chemistry,University of Bergen,Allegate 4l,5007,Bergen,Norway;
State Key Laboratory of Heavy Oil Processing,University of Petroleum,Beijing,102249,China;
State Key Laboratory of Heavy Oil Processing,University of Petroleum,Beijing,102249,China;
State Key Laboratory of Heavy Oil Processing,University of Petroleum,Beijing,102249,China;
Department of Chemistry,University of Bergen,Allegate 4l,5007,Bergen,Norway;
Department of Chemistry,University of Bergen,Allegate 4l,5007,Bergen,Norway;
crude oil emulsion; interfacialtension; vacuum residual; supercritical fluid extraction and fractionation;