Synthesis and Properties of a Novel Branched Polyether Surfactant

Li, Zhongwei; Shi, Zhengyang; Zhao, Shile; Yin, Shuo; Tan, Guangyuan; Jing, Bo; Tan, Yebang

doi:10.1007/s11743-016-1879-7

Cited by 11 publications

(11 citation statements)

References 65 publications

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“…This is because the hydrophilicity of the polyether demulsifier increases with the increase in the proportion of EO. 55,56 The improvement of hydrophilicity makes the demulsifier reach the oil−water surface faster, the surface tension of the oil−water interface is weakened, the strength of the interface membrane of the oil−water interface is reduced, and the dehydration rate is increased. But greater hydrophilicity is not always better.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…By comparing FYJP1, FYJP2, FYJP3, and FYJP4 in Figure a,c, it can be seen that when the PO content is constant, the amount of dehydration and the dehydration rate increase significantly as the EO content increases. This is because the hydrophilicity of the polyether demulsifier increases with the increase in the proportion of EO. , The improvement of hydrophilicity makes the demulsifier reach the oil–water surface faster, the surface tension of the oil–water interface is weakened, the strength of the interface membrane of the oil–water interface is reduced, and the dehydration rate is increased. But greater hydrophilicity is not always better.…”

Section: Results and Discussionmentioning

confidence: 99%

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Synthesis and Study of a New Type of Nonanionic Demulsifier for Chemical Flooding Emulsion Demulsification

et al. 2021

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The application of chemical flooding improves the stability of the produced emulsion, which reduces the demulsification efficiency of conventional demulsifiers. To improve the demulsification effect, in this paper, a new multibranched nonanionic polyether demulsifier, FYJP, was prepared by grafting carboxylate based on a nonionic demulsifier. The FYJP demulsifier could generate an initiator through p-tert-butylphenol, triethylenetetramine, and methanol, which was polymerized with ethylene oxide (EO) and propylene oxide (PO) to produce a nonionic polyether demulsifier. Sodium chloroacetate was used to modify the polyether demulsifier to obtain a new type of nonanionic polyether demulsifier. The FYJP polyether demulsifier was characterized by the hydrophilic−lipophilic balance (HLB) value, relative solubility (RSN), and surface activity of the demulsifier, and the demulsification mechanism was analyzed by a microscopic demulsification process test, and the effect of demulsifier dosage on the demulsification effect was discussed. Meanwhile, a dehydration test was carried out. The experimental results showed that the highest dehydration rate of the demulsifier was 94.7% at 85 °C, 100 ppm demulsifier dosage, 50 mL of a W/O emulsion, and 120 min demulsification time. The abovementioned studies show that FYJP is an effective demulsifier for chemical flooding emulsions, and this work promises to provide a reference for future demulsifier research.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Synthesis and Study of a New Type of Nonanionic Demulsifier for Chemical Flooding Emulsion Demulsification

et al. 2021

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“…When the temperature is elevated enough to cause a change of the solution from clear to turbid, the intersection is taken as the cloud point. 22,23 Figure 3a demonstrates the temperature dependence of turbidity. For DP, a linear-ship appears between its turbidity and temperature in the experimental range, and thus, no cloud point is found.…”

Section: Resultsmentioning

confidence: 99%

Practical Modification of Tannic Acid Polyether Demulsifier and Its Highly Efficient Demulsification for Water-in-Aging Crude Oil Emulsions

Liu

et al. 2019

ACS Omega

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In order to break the aging crude oil (WACO) emulsion of the offshore platform more effectively, a highly active isocyanate, polyaryl polymethylene isocyanate (PAPI), was selected to modify the pilot-scale tannic acid demulsifier. In the addition of PAPI, its molecular weight and viscosity dramatically increased, while its relative solubility, hydroxyl number, and cloud point exhibited an opposite direction, showing an increase in hydrophobicity. After adding the above modified demulsifier, a remarkably improved water removal of WACO emulsion accompanied by a notable reduction of the water content in the oil phase monitored by the Karl Fischer method was observed. Demulsification on the offshore platform demonstrated that the best water removal was achieved when the proportion of PAPI is 1.5 wt %. Its demulsification efficiency reached 95.7%, which was 25.6% higher than the 76.2% of unmodified demulsifier. In addition, a positive correlation between viscoelasticity of emulsion and demulsification performance was found by only adjusting the parameters of the rheometer. This method may be utilized to characterize the demulsification performance by any rotary rheometer. The pilot-scale demulsification experiment demonstrated that the water removal can reach 98.14 vol % and residual water content was only 0.55 vol %. These results further confirmed the excellent demulsification performance of the modified demulsifier toward the WACO emulsion in production.

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“…The high interfacial activity is beneficial for the hydrophilic amine groups of the demulsifier molecule to rapidly diffuse to the oil−water interface when CHPEI-2 demulsifiers are added to the O/W emulsions. As a result of the specific highly branched structure, 39 the hydrophilic groups multipointly stretch to water droplets; nevertheless, the hydrophobic groups gather around the water droplets. The demulsifier rapidly destroys the interface film and causes large oil droplets to aggregate during the early stage of the demulsification process.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Modified Hyperbranched Polyethylenimine as a Novel Demulsifier for Oil-in-Water Emulsions

et al. 2019

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The demulsification of oil-in-water emulsions with microdroplets has drawn great attention as a result of their extreme stability and difficulty of separation. In this work, a series of palmitoyl-hyperbranched polyethylenimine (CHPEI) with a hyperbranched structure was developed to meet the requirement of the demulsification. The influential factors of the demulsifier concentration, sedimentation time, and temperature on demulsification were investigated to give a clear view of CHPEI-based demulsification. The results indicated that the oil removal efficiency reached 91% by adding 80 mg/L CHPEI with sedimentation time of 30 min and showed a short sedimentation time and low addition amount compared to traditional demulsifiers. Further, to better acquire the mechanism of demulsification, the oil–water interfacial tension of CHPEI demulsifiers in aqueous phase and the real-time size changes of oil droplets were both recorded. These properties make CHPEI a potential candidate as an efficient demulsifier for crude oil.

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Synthesis and Properties of a Novel Branched Polyether Surfactant

Cited by 11 publications

References 65 publications

Synthesis and Study of a New Type of Nonanionic Demulsifier for Chemical Flooding Emulsion Demulsification

Synthesis and Study of a New Type of Nonanionic Demulsifier for Chemical Flooding Emulsion Demulsification

Practical Modification of Tannic Acid Polyether Demulsifier and Its Highly Efficient Demulsification for Water-in-Aging Crude Oil Emulsions

Modified Hyperbranched Polyethylenimine as a Novel Demulsifier for Oil-in-Water Emulsions

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