Elsharaky Elsayed A, El-Tabei Aziza S, El-Tabey Amira E
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt.
ACS Omega. 2022 Aug 29;7(36):32471-32480. doi: 10.1021/acsomega.2c03958. eCollection 2022 Sep 13.
This research aimed to synthesize new polymeric nonionic demulsifiers (DA, DB, and DC) to break 50% of naturally occurring water/oil emulsions. The prepared demulsifiers were synthesized in only two stages utilizing simple techniques. H and CNMR, MS, and FTIR spectroscopies were performed to validate the chemical composition of the synthesized demulsifiers. The relative solubility number (RSN) and partition coefficient ( ) were determined for the three demulsifiers. The interfacial tension (IFT) and dehydration ratios of DA, DB, DC, and their triblock copolymers were investigated. Also, interfacial rheological properties for the three demulsifiers were measured. The findings demonstrate that DB possesses a higher RSN value than DA and DC owing to its hydrophilicity. DC exhibited the lowest IFT value compared to DA, DB, and their corresponding triblock copolymers. DB and DC are more effective in demulsifying than DA and triblock copolymers. DC achieved a 100% dehydration ratio at a low dosage of 75 ppm after 120 min. DC's remarkable performance can be attributed to its aromatic core, molecular weight, and high interfacial activity. According to the rheological data, a higher dehydrating ratio is attained when the demulsifier has a great capacity to lower the viscoelasticity of the W/O emulsion interface. The maximum decrease in ' and ″ values was attained by DC. The mechanism of DC's demulsifying interaction on a naturally occurring W/O emulsion was elucidated.
本研究旨在合成新型聚合物非离子破乳剂（DA、DB和DC），以破乳50%的天然水/油乳液。所制备的破乳剂仅通过两个步骤利用简单技术合成。进行了氢核磁共振（H NMR）、碳核磁共振（C NMR）、质谱（MS）和傅里叶变换红外光谱（FTIR）分析，以验证合成破乳剂的化学成分。测定了三种破乳剂的相对溶解度数（RSN）和分配系数（ ）。研究了DA、DB、DC及其三嵌段共聚物的界面张力（IFT）和脱水率。此外，还测量了三种破乳剂的界面流变性能。研究结果表明，由于DB的亲水性，其RSN值高于DA和DC。与DA、DB及其相应的三嵌段共聚物相比，DC的IFT值最低。DB和DC在破乳方面比DA和三嵌段共聚物更有效。DC在低剂量75 ppm下120分钟后实现了100%的脱水率。DC的卓越性能可归因于其芳香核、分子量和高界面活性。根据流变学数据，当破乳剂具有降低W/O乳液界面粘弹性的强大能力时，可获得更高的脱水率。DC使“ ”和“ ”值的下降幅度最大。阐明了DC对天然W/O乳液的破乳相互作用机制。
