MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202631043603 A) filed by Brainware University, Kolkata, West Bengal, on April 6, for 'a process for optimized pretreatment and conversion of lignocellulosic rice straw into biodiesel using multi-stage filtration and controlled transesterification.'

Inventor(s) include Mr. Sagar Banik; Mr. Krishanu Adhikari; Ms. Hritwisha Mondal; Dr. Nabyendu Pramanik; Dr. Deb Prasad Ray; Ms. Riya Sarkar; and Dr. Soham Hazra.

The application for the patent was published on April 17, under issue no. 16/2026.

According to the abstract released by the Intellectual Property India: "The present invention relates to a process for producing biodiesel from lignocellulosic rice straw through an optimized sequence of pretreatment, extraction, transesterification, and purification steps. The process includes mechanical size reduction of rice straw followed by soaking in water to form a slurry, which is filtered to obtain a liquid extract. The extract is subjected to a controlled transesterification reaction using a solvent system and a catalyst to produce biodiesel and by-products. The biodiesel is separated and further purified through multi-stage filtration including cloth-based and membrane-based techniques to remove impurities and moisture. The process utilizes abundant agricultural residue to generate a renewable and environmentally sustainable fuel. The produced biodiesel exhibits improved physicochemical properties and is suitable for use in diesel engines, thereby reducing dependence on fossil fuels and minimizing environmental pollution."

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