Effects of additional salts on the interfacial tension of crude oil/zwitterionic gemini surfactant solutions

Lv, Kaihe; Jia, Kaile; Yang, Yuqiu; Huang, Wenjian; Wu, Hongyan; Pan, Wei; Jia, Han

doi:10.1080/01932691.2018.1494606

Cited by 11 publications

(3 citation statements)

References 41 publications

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“…Under high salinity conditions, the interfacial properties of many surfactants were greatly reduced, and they could not reduce the IFT of oil–water interfacial tension to ultra‐low levels by themselves and were usually solved by combined flooding (Ge et al, 2021; Guo et al, 2021; Kurnia et al, 2020; Lv et al, 2019; Zhang et al, 2014). Therefore, the interfacial properties of PADS under high salinity conditions needed to be further investigated.…”

Section: Resultsmentioning

confidence: 99%

A new zwitterionic surfactant with high interfacial activity and high salt tolerance derived from methyl oleate through an eco‐friendly aryl‐introducing method

Liu

Gao

Zhang

et al. 2022

J Surfact & Detergents

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Surfactants, that can reduce the interfacial tension between crude oil and formation water to ultra-low, are needed in tertiary oil recovery. A bio-based zwitterionic surfactant, N-phenylpropanaldehyde epoxy acetal octadecanoicamido propyl-N, N-dimethyl hydroxy sulfonate (PADS), was derived from methyl oleate. In the process of synthesizing PADS, a new reactive site was introduced by epoxidizing methyl oleate and then the benzene ring was introduced by acetalization, which was a greener new method of introducing benzene ring into hydrophobic chains of surfactants. PADS was identified by ESI-MS and NMR, and its interfacial activity was measured by interfacial tensiometer. The results showed that PADS possessed excellent interfacial activity and potential for low-dose application. Under alkali-free conditions, it could reduce the interfacial tension between crude oil and simulated formation water to ultra-low in a wide concentration range (0.005-3 g/L). In addition, although the NaCl concentration was 230 g/L in the system, PADS still had good interfacial activity and could maintain ultra-low oil-water interfacial tension. The protocol of epoxidation and acetalization provides a new feasible path to preparing bio-based surfactants with high interfacial activity.K E Y W O R D S acetalization, bio-based zwitterionic surfactant, enhanced oil recovery, epoxidized fatty acid esters, ultra-low interfacial tension

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Section: Resultsmentioning

confidence: 99%

A new zwitterionic surfactant with high interfacial activity and high salt tolerance derived from methyl oleate through an eco‐friendly aryl‐introducing method

Liu

Gao

Zhang

et al. 2022

J Surfact & Detergents

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“…The addition of salt solution can effectively reduce the surface tension of FB 1 polyether solution, and the phenomenon of double inflection point disappears, which is due to the presence of a large number of free ions in the salt solution. The reduction ability of CaCl 2 and MgCl 2 is slightly stronger than that of NaCl . This is because the hydration of calcium and magnesium ions is lower than that of sodium ions, so the solubility of polyether is lower in the presence of sodium ions.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The reduction ability of CaCl 2 and MgCl 2 is slightly stronger than that of NaCl. 54 This is because the hydration of calcium and magnesium ions is lower than that of sodium ions, so the solubility of polyether is lower in the presence of sodium ions. In addition, CaCl 2 and MgCl 2 contain two chloride ions, which, as typical salting-out-type ions, show strong water removal capacity.…”

Section: Surface Tension Of Fb Series Polyether Demulsifiermentioning

confidence: 99%

Synthesis and Study of a New Type of Fluorinated Polyether Demulsifier for Heavy Oil Emulsion Demulsification

et al. 2021

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To solve the problem of heavy oil demulsification difficulties in Liaohe Oilfield, phenolamine resin initiator was synthesized from p-trifluoromethyl phenol, and then FB series fluorinated polyether demulsifiers were synthesized by block polymerization using ethylene oxide (EO) and propylene oxide (PO) as raw materials. The demulsifiers were characterized by infrared spectroscopy, cloud point, hydrophilic–lipophilic balance (HLB) value, and surface tension. The demulsifying and dehydrating properties were tested by demulsifying and dehydrating experiments, the demulsification mechanism was analyzed by the microscopic demulsification process test, and the influence of demulsifier addition and demulsifying temperature on demulsifying performance was also studied. The results showed that under the condition of the optimum demulsification temperature of 60 °C and the optimum demulsifier dosage of 100 mg/L, the water removal (%) of fluorinated polyether demulsifier of FB 4 was the highest, and the overall water removal (%) of 50 mL crude oil emulsion in Liaohe Oilfield reached 90.33% within 2 h, which was better than the current demulsifier used in Liaohe crude oil.

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How the Influence of Different Salts on Interfacial Properties of Surfactant–Oil–Water Systems at Optimum Formulation Matches the Hofmeister Series Ranking

Vera

Salazar-Rodríguez

Márquez

et al. 2020

J Surfact & Detergents

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In this work, we present the effects of salts on sodium dodecyl benzene sulfonate micellization and on the interfacial performance of a sodium dodecyl benzene sulfonate-heptane-brine system at optimum formulation, i.e., hydrophilic-lipophilic deviation (HLD) = 0. In order to do that, interfacial tension and dilational interfacial rheology properties of surfactant-heptane-water systems at optimum formulation are measured using an interfacial spinning drop tensiometer with an oscillating velocity, which can accurately measure interfacial rheology properties at both low and ultralow interfacial tensions. The brines used contain one of the following salts: MgCl 2 , CaCl 2 , NaCl, NH 4 Cl, NaNO 3 , CH 3 COONa, or Na 2 SO 4 . We performed a one-dimensional salinity scan with each of these salts to achieve an optimum formulation. In relation to the Hofmeister series, we found that, at optimum formulation, systems with chaotropic ions (NH 4 + , NO 3 − ) present interfaces with ultralow interfacial tensions, very low dilational modulus, and a low phase angle, whereas kosmotropic ions (Mg 2+ , Ca 2+ , SO 4 −2 ) generate high interfacial tension and high rigidity monolayers. Intermediate ions in the Hofmeister series (Na + , CH 3 COO − , Cl − ) present interfaces with intermediate properties. Furthermore, according to the Hofmeister series, interfaces can be respectively ordered from higher to lower rigidity for surfactant counterions Mg 2+ > Ca 2+ > Na + > NH 4 + and coions SO 4 2− > CH 3 COO -> Cl − > NO 3 −, which correspond to a saltingout (highest rigidity) and salting-in (lowest rigidity) effect. We observed that counterions have a more significant effect on surfactant-oil-water system properties than those that act as coions.Keywords Hofmeister series Á Interfacial rheology Á Microemulsion Á Micellization Á Salt effects Á Ultralow interfacial tension J Surfact Deterg (2020) 23: 603-615.

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Effects of additional salts on the interfacial tension of crude oil/zwitterionic gemini surfactant solutions

Cited by 11 publications

References 41 publications

A new zwitterionic surfactant with high interfacial activity and high salt tolerance derived from methyl oleate through an eco‐friendly aryl‐introducing method

A new zwitterionic surfactant with high interfacial activity and high salt tolerance derived from methyl oleate through an eco‐friendly aryl‐introducing method

Synthesis and Study of a New Type of Fluorinated Polyether Demulsifier for Heavy Oil Emulsion Demulsification

How the Influence of Different Salts on Interfacial Properties of Surfactant–Oil–Water Systems at Optimum Formulation Matches the Hofmeister Series Ranking

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