Chen, Zhao;Li, Yuanli;Liu, Xiaomin;Cui, Zhenggang published 《Dialkyl Sulfobetaine Surfactants Derived from Guerbet Alcohol Polyoxypropylene-Polyoxyethylene Ethers for SP Flooding of High Temperature and High Salinity Reservoirs》. The research results were published in《Journal of Surfactants and Detergents》 in 2021.Electric Literature of C16H34O The article conveys some information:
Dialkyl hydroxypropyl sulfobetaine (HSB) surfactants, C16GA-(PO)5-(EO)3-HSB and C24GA-(PO)10-(EO)10-HSB, were synthesized from Guerbet alcs. (GA) polyoxypropylene-polyoxyethylene (PO-EO) ethers and their behaviors in surfactant-polymer (SP) flooding of high temperature and high salinity reservoirs were examined and compared with their anionic hydroxypropyl sulfonate (HS) counterparts, C16GA-(PO)5-(EO)3-HS and C24GA-(PO)10-(EO)10-HS. The PO-EO chain embedded improves their aqueous solubility, and the sulfobetaines show better salt resistance than sulfonates. For a reservoir condition of total salinity 19,640 mg L-1 and 60-80°C, C16GA-(PO)5-(EO)3-HSB alone can reduce crude oil/connate water interfacial tension (IFT) to ultralow at 0.25-5 mM, which can be further widened to 0.1-5 mM by mixing with dodecylhexyl (C12+6) glyceryl ether hydroxypropyl sulfobetaine (C12+6GE-HSB), a slightly hydrophobic surfactant. C24GA-(PO)10-(EO)10-HSB is more hydrophobic for the specified reservoir condition, however, by mixing with hexadecyl di-Me hydroxypropyl sulfobetaine (C16HSB), a hydrophilic surfactant, ultralow IFT can also be achieved at a total concentration of 0.25-5 mM. The anionic counterparts can also reduce IFT to ultralow by mixing with C12+6GE-HSB and C16HSB, resp. Moreover, the optimum binary mixture, C16GA-(PO)5-(EO)3-HSB/C12+6GE-HSB at a molar fraction ratio of 0.6/0.4, can keep the neg. charged solid surface water-wet (θw = 12-23°) in a wide concentration range, and can still achieve ultralow IFT after stored at 90°C for 90 days (initially 5 mM), which overall are favor of improving oil displacement efficiency at high temperature and high salinity reservoir conditions. The experimental procedure involved many compounds, such as 2-Hexyl-1-decanol (cas: 2425-77-6) .
2-Hexyl-1-decanol(cas: 2425-77-6) is a fatty acid that is found in the essential oils of plants and has been shown to have fungicidal properties.Electric Literature of C16H34O It has also been shown to inhibit the growth of Candida glabrata when used as a cationic surfactant.
Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts