JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2021, Vol. 56 ›› Issue (10): 127-134.doi: 10.6040/j.issn.1671-9352.9.2021.010

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Synthesis and properties of hydrophobic associated cationic polymers and their application in viscosity reduction of heavy oil

TAN Ye-bang1*, WANG Qiu-xia2, GU Lin1, LIU Yi-gang2, HAN Yu-gui2   

  1. 1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
    2. CNOOC Ltd., Tianjin Branch, Bohai Oilfield Research Institute, Tianjin 300452, China
  • Published:2021-09-28

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Abstract: The cationic monomer 4-vinylbenzyl dodecyldimethylammonium chloride(VBDDMAC)was synthesized by quatermarization of N,N-dimethyldodecylamine and 4-vinylbenzene, and then the copolymers were prepared by the copolymerization of acrylamide(AM), N-acrylamide morpholine(ACMO)and VBDDMAC. Different copolymers with different monomer ratios were synthesized. The structure of the copolymer was characterized by NMR and IR spectra. The aggregation behavior of the copolymer in aqueous solution was investigated by resonance light scattering. In addition, the interaction between the copolymer and the crude oil was investigated by interfacial tension and contact angle measurement. Finally, the viscosity reduction of the heavy oil was investigated. The results show that the cationic ingredient VBDDMAC makes the copolymer have some emulsifying properties, and the monomer ACMO enhances the interaction between polymer and heavy oil component to greatly reducing the viscosity of heavy oil.

Key words: water soluble cationic polymer, amphiphilic polymer, hydrophobic association, emulsifying property, heavy oil viscosity reduction

CLC Number: 

  • TE53
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