MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541122809 A) filed by Dr. Vinoth Kumar Raja, Tadepalligudem, Andhra Pradesh, on Dec. 5, 2025, for 'fabricating a multichannel tubular ceramic microfiltration membrane using indian bentonite clay.'
Inventor(s) include Dr. Vinoth Kumar Raja; Dr. S. Lakshmi Sandhya Rani; and Maddala Sree Kanth.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present invention is related to cost-effective ceramic membrane raw materials and their composition (100) and a method (200) for fabricating a multichannel tubular ceramic microfiltration membrane. The composition comprises Indian bentonite clay (65-75 wt%), sugarcane bagasse ash (10-20 wt%), and palm oil fuel ash (10-20 wt%). The bentonite provides plasticity and mechanical integrity, while the ash components generate interconnected micro-scale porosity during sintering below 1000 C. The fabrication method includes raw material mixing, water addition, paste ageing, extrusion using a double-shaft horizontal extruder, drying, controlled sintering, polishing, and ultrasonication. The fabricated multichannel tubular membrane comprises 16 longitudinal channels, each having a hydraulic diameter of about 4 mm, and an external tubular diameter of about 34 mm, and wherein the membrane exhibits uniform channel geometry and consistent dimensional reproducibility across multiple fabrication cycles. exhibits synergistically enhanced porosity, mechanical strength, thermal stability, chemical resistance, and hydraulic permeability. The invention is suitable for cost-effective microfiltration applications in industrial separation processes."
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