MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202541034076 A) filed by Peter Vadakumpaden Thomas, Angamaly, Kerala, on April 7, 2025, for 'a process for production of rpet granules from waste pet by vacuum glycolysis.'
Inventor(s) include Peter Vadakumpaden Thomas.
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: "Present invention provides a process for production of rPET granules from waste PET by vacuum glycolysis. Further it relates to a continuous, catalyst-free, and extrusion-free depolymerisation process for producing food-grade recycled Polyethylene Terephthalate (rPET) granules. The process comprises maintaining PET flakes in flake silo (101) at 40OC to 45OC and subjecting to softening treatment with superheated glycol vapor from an evaporator (102) at 205OC to 220OC for 20 to 30 minutes within a mixing reactor (103). The softened flakes undergo vacuum glycolysis in a reactor (106) at 190OC to 195OC by contacting them with hot glycol (104) to produce a reaction mixture of monomers and oligomers. The mixture is purified through a 3-micron filtration assembly and subjected to polycondensation at 280OC to 285OC to produce a polymer melt. Finally, the melt is pelletized and treated in an acetaldehyde removal tower to achieve acetaldehyde content of less than 1 ppm."
Disclaimer: Curated by HT Syndication.
