Abd-Alla Gad Abd-Alla, Tasneem2020-10-122020-10-122020Copyright © 2020 MSA University. All Rights Reserved.http://central-library.msa.edu.eg:8009/xmlui/handle/123456789/3868Faculty Of Biotechnology Graduation Project 2019 - 2020Depletion of petroleum resources and environmental concern, has increased the demand for vegetable oil-based natural esters. In Egypt, it was reported that consumption of lubricants reached 760.025 barrels per day. “Eco-friendly” biodegradable waste vegetable oils can be used as an alternative for petroleum based lubricant that can be applied at power plant. Natural ester insulating (NEI) oils are promising substitutes for mineral insulating (MI) oils because these oils reduce aging of insulating papers in high-voltage oil-immersed power transformers. This work aimed to present the preparation of NEI oil by the esterification process of waste vegetable oil, in addition to comparing chemical, physical and electrical properties for the produced NEI from esterified waste cooking oil and MI oil.enMSAOctober University for Modern Sciences and ArtsUniversity for Modern Sciences and Artsجامعة أكتوبر للعلوم الحديثة والآدابBiotechnologyPower PlantOther