MUMBAI, India, Aug. 1 -- Intellectual Property India has published a patent application (202517067508 A) filed by Mitsubishi Chemical Corporation, Tokyo, on July 15, for 'method for producing bisphenol and method for producing recycled polycarbonate resin.'
Inventor(s) include Nakashima, Yukie; Kinoshita Umeno, Misaki; and Nagano, Fumika.
The application for the patent was published on Aug. 1, under issue no. 31/2025.
According to the abstract released by the Intellectual Property India: "Provided is a method for producing bisphenol, the method being capable of obtaining bisphenol which has excellent purity and does not contain other resins derived from a coating layer, an alloy material, or the like. The method for producing bisphenol according to the present invention, with which bisphenol is obtained by removing resins other than polycarbonate resins from a mixed solution containing bisphenol and the other resins. The production method has a step 1 for precipitating bisphenol from an aromatic monoalcohol-containing solution in which the bisphenol and the other resins are dissolved in a solvent including an aromatic monoalcohol, thereby obtaining a slurry of the bisphenol, and subjecting the bisphenol slurry to solid-liquid separation to obtain a crude cake of the bisphenol and a base liquid."
The patent application was internationally filed on Jan. 19, 2024, under International application No.PCT/JP2024/001424.
Disclaimer: Curated by HT Syndication.
