MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202541027701 A) filed by Hindustan Petroleum Corporation Limited on March 25, 2025, for Method For Removal Of Metals From Used Lube Oil By Solvent Extraction Method.
Inventors include Ganagalla, Srinivasa Rao; Ranaware, Virendra; Enumula, Siva Sankar; Ramesh, Kanaparthi; Gnanasekaran, Valavarasu; Sundararaman, Sriram; and Maheswari, Vipul Kumar.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: The present disclosure relates to a method for regenerating spent lube oil through separation and extraction techniques. The process involves separating and removing sludge using a base treatment, followed by solvent extraction to eliminate metals and asphaltenes from the separated oil. This method achieves an oil recovery rate of 75–87%, significantly 99.58 % reducing the metal content (from an initial 4306 ppm to approximately 18 ppm). The invention offers an efficient and sustainable approach to regenerating high-quality base oil from spent lube oil.
Disclaimer: Curated by HT Syndication.
