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DSC thermal analysis of the basic physical properties and freezing point of Nanyang crude viscosity , viscoelasticity , yield value of the rheological properties of crude oil , the characteristics of the wax obtained Nanyang crude oil is high wax content , pour point high low - temperature viscosity , composition of the complex congealable highly viscous crude oil . Nanyang basic characteristics of the crude oil , the paper selected seven kinds on the market , the effect of most of the crude oil pour generally better the EVA type of pour point depressant , EVA2806 , EVA2815 , EVA2820 , EVA2825 , EVA28150 , EVA28420 , EVA19400 to a concentration of 20% (solvent for diesel). With seven kinds of EVA type pour point depressant the Nanyang crude complex , a complex type of pour point depressant XIN - 1 complex . According to Nanyang basic characteristics of the crude oil , the article also choose three in the domestic and international applications better BEM pour point depressant , BEM -JN - 2 # BEM -JN - 6 # JN -8 # three are formulated to a concentration of 2% ( the solvent is diesel oil) , also selected some additives diesel oil, white oil , toluene and xylene . JN-8 # and toluene compound modified better based on studies of the complex , and ultimately developed a complex with type pour point depressant XIN - 2 . Both complex type of pour point depressant the XIN-1 and the XIN-2 Nanyang crude oil are better than single agent to reduce the pour viscosity reduction effect . Both pour point depressant the Nanyang crude pour viscosity reduction of the role of the law , such as additives before and after the pour point of crude oil , wax precipitation point , abnormal point and viscosity variation the viscoelasticity of crude oil with additives before and after the temperature variation DSC additives before and after crude oil and wax precipitation characteristics variation .
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