Li Xingang, Hou Jinjian, Sui Hong, Sun Lingyu, Xu Lin
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
National Engineering Research Centre for Distillation Technology, Tianjin 300072, China.
Materials (Basel). 2018 Nov 30;11(12):2431. doi: 10.3390/ma11122431.
In this study, SHT (switchable-hydrophilicity triethylamine, [Et₃NH]·[HCO₃]) has been synthesized and instrumentally characterized by Fourier transform⁻infrared spectroscopy (FTIR) and C nuclear magnetic resonance (NMR). The operational synthesis conditions of SHT were optimized and determined at 25 °C, Et₃N/H₂O volume ratio of 1:2 and CO₂ injection rate at 300 mL/min. When it was used to extract heavy oil from unconventional oil ore, it was found that it could break maltenes-in-water emulsions. When asphaltenes were present in the oil phase, it was observed that SHT could cooperate with asphaltenes. These results indicated that SHT works with asphaltenes, leading to synergistic effects in stabilizing oil⁻water (o/w) emulsions.
在本研究中，合成了可切换亲水性三乙胺（SHT，[Et₃NH]·[HCO₃]），并通过傅里叶变换红外光谱（FTIR）和碳核磁共振（NMR）对其进行了仪器表征。优化并确定了SHT在25℃、三乙胺与水体积比为1:2以及二氧化碳注入速率为300 mL/min时的合成操作条件。当用它从非常规油矿中提取重油时，发现它可以破乳水包油型胶质乳液。当油相中存在沥青质时，观察到SHT可以与沥青质协同作用。这些结果表明，SHT与沥青质协同作用，在稳定油水（o/w）乳液方面产生协同效应。
