The Effect of Hydrophobic Modified Block Copolymers on Water–Oil Interfacial Properties and the Demulsification of Crude Oil Emulsions
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Synthesis of Hydrophobic Modification Copolymers
2.3. Preparation of Block Copolymer Solution
2.4. Water-Containing Crude Oil Treatment
2.5. Preparation and Demulsification of O/W Emulsions
2.6. Preparation and Demulsification of W/O Emulsions
2.7. Oil–Water Interfacial Tension Measurements
2.8. Oil–Water Interfacial Shear Viscosity Measurements
2.9. Microscope Image Test of Emulsions
2.10. Zeta Potential Measurements
2.11. Oil Content Measurements
3. Results and Discussion
3.1. Demulsification Effect of Block Copolymers on O/W Emulsions
3.2. Demulsification Effect of Block Copolymers on W/O Emulsions
3.3. Interfacial Shear Viscosity between Oil and Block Copolymer Solution
3.4. Interfacial Tension between Oil and Block Copolymer Solution
3.5. The Mechanism of Demulsification
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Conflicts of Interest
References
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Ion | Cl− | SO42− | HCO−3 | Mg2+ | Ca2+ | Na+, K+ |
---|---|---|---|---|---|---|
Concentration (mg/L) | 3140.0 | 78.3 | 598.0 | 300 | 340 | 2430 |
Polymers | P123 | BP123 | BPF123 | H123 |
---|---|---|---|---|
nPPO/PEO | 1.75 | 1.76 | 1.76 | 1.76 |
M | 5820 | 5980 | 6090 | 6510 |
Cloud point/°C | 38 | 41 | 46 | 61 |
Polymer Conc. (mg·L−1) | Oil Content (mg·L−1) | ||||
---|---|---|---|---|---|
P123 | BP123 | BPF123 | H123 | Blank | |
5 | 523 | 261 | 19 | 6 | 768 |
10 | 302 | 192 | 10 | 4 | |
30 | 248 | 92 | 9 | 4 |
Polymer Conc. (mg·L−1) | ζ (mV) | ||||
---|---|---|---|---|---|
P123 | BP123 | BPF123 | H123 | Blank | |
5 | −30.28 | −26.87 | −5.80 | −5.05 | −43.24 |
10 | −26.60 | −21.69 | −5.25 | −4.86 | |
30 | −20.55 | −20.83 | −5.15 | −4.77 |
Polymer Conc. (mg·L−1) | Dewatering Rate (%) | ||||
---|---|---|---|---|---|
P123 | BP123 | BPF123 | H123 | Blank | |
5 | 60 | 65 | 80 | 88 | 0 |
10 | 65 | 70 | 85 | 95 | |
30 | 66 | 72 | 89 | 97 |
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Zhang, J.; Liu, P.; Gao, Y.; Yu, Q. The Effect of Hydrophobic Modified Block Copolymers on Water–Oil Interfacial Properties and the Demulsification of Crude Oil Emulsions. Polymers 2024, 16, 2392. https://doi.org/10.3390/polym16172392
Zhang J, Liu P, Gao Y, Yu Q. The Effect of Hydrophobic Modified Block Copolymers on Water–Oil Interfacial Properties and the Demulsification of Crude Oil Emulsions. Polymers. 2024; 16(17):2392. https://doi.org/10.3390/polym16172392
Chicago/Turabian StyleZhang, Juan, Ping Liu, Yuan Gao, and Qingping Yu. 2024. "The Effect of Hydrophobic Modified Block Copolymers on Water–Oil Interfacial Properties and the Demulsification of Crude Oil Emulsions" Polymers 16, no. 17: 2392. https://doi.org/10.3390/polym16172392