MUMBAI, India, Sept. 12 -- Intellectual Property India has published a patent application (202411014096 A) filed by Revalyu Resources Gmbh, Kleinostheim, Germany, on Feb. 27, 2024, for 'method for regeneration of polyester and recycling of polyester textile waste using an organic liquid.'
Inventor(s) include Ajay Amrutkar; and Shivaji Minde.
The application for the patent was published on Sept. 12, under issue no. 37/2025.
According to the abstract released by the Intellectual Property India: "The invention relates generally to a recycling of polyesters such as polyethylene terephthalate (PET). The invention also relates to a process for producing a polyester the process comprising the following steps: a. providing a first polyester fragment; b. optionally subjecting the first polyester fragment to a thermal treatment to obtain a second polyester fragment; c. contacting the first or second polyester fragment with one or more organic liquids to obtain a further polyester fragment; converting the further polyester fragment into a plurality of polyester solids. The first polyester fragment comprises a polyester polymer and a textile chemical. The second polyester fragment comprises less textile chemical than the first polyester fragment. The organic liquid is characterized by dissolving ability parameters or by chemical structure or both. The invention further relates to a polyester product obtainable by aforementioned process, a device for treating a polyester fragment and a use of polyester solids for a purpose such as de-esterification, an esterification, a fibre, a textile, a container, a film, or a combination of at least two thereof."
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