Читать книгу Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems - Группа авторов - Страница 39

Initially, the treated biological seeds are collected and crushed using a grinder and converted into fine tiny particles. Next, the fine amorphous particles of seeds are mixed with the petroleum benzene. The solvent is allowed to stabilize for 24 hours and the yield of oil is collected, which is around 25–30% [47]. The collected oil from the solvent is treated using rotavapor for the removal of moisture as seen in Figure 2.3b. Thereafter, the crude oil is collected through filtration. The extracted crude oil has the rich content of triglycerides, which makes the crude ester highly viscous and of weak flowability. The triglyceride configuration is formed by condensation of three hydroxyl groups with carboxyl groups of three fatty acids, as shown in Figure 2.4a. Since the extracted crude oil from the treated seeds through mechanical and chemical treatment has a high viscosity and acidity content, it is not suitable as liquid dielectric. Therefore, the transesterification process is followed for the crude oil for suitable liquid dielectrics.