Synthesis of new EVA graft copolymer and its pour point depressant performance evaluation for Daqing crude oil
EVA was widely used as the pour point depressant for waxy oil. In order to improve its effect, some graft copolymerization methods should be used to modify EVAs property. EVA has long side chains and nitrogen polar groups to enforce its adaptability and effect of waxy oil. The pure amine, maleicanhydride and their reaction product were tested using infrared spectra and the NMR spectral. The results show that when the modified EVA is added into oil, the wax deposits not only on the main chain but also on the side chains. And the polar groups have the function to avoid and resist the wax crystals connection each other to form the net. Using the reaction product of maleicanhydride and high carbonic amine (C12, C16, C18 amine) as the graft component, the toluene as the solvent and BPO as the initiator, the series of new EVA graft copolymer with special side chains are prepared under controlled condition. A series of cylmaleimide exist indeed in modified EVA and the highest grafted percentage is 18.8%. EVA-16,the new graft copolymer, is better than EVA about 3 ℃ more in depressant the pour-point of Daqing waxy crude oil.
modification EVA copolymer pour point depressants performance evolution Daqing crud
WU Li-juan(伍丽娟) ZHANG Fan(张帆) GUAN Zhong-yuan(关中原) GUO Shu-feng(郭淑凤)
Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum,B Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum,B Scientific and Technical Center of China Petroleum Pipeline Corporation, Langfang 065000, China
国际会议
长沙
英文
488-491
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）