Elkatory Marwa R, Hassaan Mohamed A, Soliman Emad A, Niculescu Violeta-Carolina, Raboaca Maria Simona, El Nemr Ahmed
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, SRTA-City, Alexandria 21934, Egypt.
Environment Division, Marine Pollution Department, National Institute of Oceanography and Fisheries (NIOF), Alexandria 21556, Egypt.
Polymers (Basel). 2023 Jan 6;15(2):306. doi: 10.3390/polym15020306.
An important problem for the oil industry is the deposition of paraffin on pipelines during the transit of crude oil and restart processes at low temperature. In this regard, the need for suitable methods of wax deposition has attracted substantial attention. Therefore, pour point depressants (PPDs) are considered a critical processing aid to modify the paraffin crystallization and improve the flow of waxy crude oil. The effect of pendants in comb-type copolymers on the ability of crude oil to flow in the cold is examined in the current study. Such PPDs were first created by the free radical polymerization of maleic anhydride with benzyl oleate to create the poly (benzyl oleate-co-maleic anhydride). The resultant copolymer was then aminated with alkyl amine (stearyl amine) (CHN) to form pendant alkyl amine chains. The esterified copolymers were structurally characterized by Fourier Transform Infrared, X-ray diffraction spectral analysis, and scanning electron microscopy. Moreover, the potential interactions between PPD and waxes were investigated by using differential scanning calorimetry, X-ray diffraction, and light microscopy. The obtained PPDs, which are effective at a dose of 2000 ppm, were able to reduce the pour point by up to 3 °C. The viscosity and yield stress of the petroleum waxy crude oil were revealed by rheometer.
对于石油行业来说，一个重要的问题是在原油运输过程以及低温重启过程中石蜡在管道上的沉积。在这方面，对合适的蜡沉积方法的需求引起了广泛关注。因此，降凝剂（PPDs）被认为是一种关键的加工助剂，用于改变石蜡结晶并改善含蜡原油的流动性。本研究考察了梳型共聚物中侧链对原油在低温下流动能力的影响。此类降凝剂首先通过马来酸酐与油酸苄酯的自由基聚合反应制备得到聚（油酸苄酯 - 共 - 马来酸酐）。然后将所得共聚物与烷基胺（硬脂胺）（CHN）进行胺化反应，形成侧链烷基胺链。通过傅里叶变换红外光谱、X射线衍射光谱分析和扫描电子显微镜对酯化共聚物进行了结构表征。此外，利用差示扫描量热法、X射线衍射和光学显微镜研究了降凝剂与蜡之间的潜在相互作用。所制备的降凝剂在剂量为2000 ppm时有效，能够使倾点降低多达3°C。用流变仪揭示了石油含蜡原油的粘度和屈服应力。
