文献类型：专利

英文题名：Surfactant complex system used for reducing oil-water interfacial tension, comprises ionic liquid surfactant i.e. alkyl imidazole ionic liquid, coupling anionic surfactant, alkali, polymer, and water

作者：WANG F;LIU H;SONG W;SHANG Y;PENG C

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN101899292-B

公开日：2013-04-17

语种：英文

收录：DERWENT

摘要：NOVELTY - Surfactant complex system comprises (wt.%) ionic liquid surfactant (0.02-1.0), coupling anionic surfactant (0.03-1.5), alkali (0-1.2), polymer (0-0.15), and water (96.15-99.95). The ionic liquid surfactant is alkyl imidazole ionic liquid (I). The coupling anionic surfactant is carboxylate or sulfonate coupling surfactant or mixture of carboxylate or sulfonate with anionic surfactant except the coupling anionic surfactant. The polymer is polyacrylamide or modified polyacrylamide. USE - The surfactant complex system is used for reducing oil-water interfacial tension (claimed). It is used as tertiary oil recovery oil displacement liquid. ADVANTAGE - Less ionic surfactant is added to the surfactant complex system to reduce the interfacial tension of oil and water for more than one order of magnitude compared with the system, which does not contain ionic liquid. The special performances of ionic liquid and coupling surfactant and their synergistic effect makes the surfactant complex system have great reduction effect of interfacial tension under the condition of lower concentration. The surfactant complex system has stable performance; and does not need the addition of auxiliary agent to obtain a solution, which is stable at lower than room temperature to 100 degrees C. DETAILED DESCRIPTION - Surfactant complex system comprises (wt.%) ionic liquid surfactant (0.02-1.0), coupling anionic surfactant (0.03-1.5), alkali (0-1.2), polymer (0-0.15), and water (96.15-99.95). The ionic liquid surfactant is alkyl imidazole ionic liquid of formula (Cn mim)(X) (I). The coupling anionic surfactant is carboxylate or sulfonate coupling surfactant or mixture of carboxylate or sulfonate with anionic surfactant except the coupling anionic surfactant. The alkali is selected from MOH, M2CO3, MHCO3, M3PO4, M2HPO4, and/or MH2PO4. The polymer is polyacrylamide or modified polyacrylamide. n=8, 10, or 12; X=Cl- or Br-; M=Na or K;and mim=not defined.