MUMBAI, India, Nov. 14 -- Intellectual Property India has published a patent application (202517094994 A) filed by Shell Internationale Research Maatschappij B. V., Hague, Netherlands, on Oct. 3, for 'batch process for preparing a polyether alcohol using a double metal cyanide catalyst.'
Inventor(s) include Davis, Paul; Talwalkar, Sandip Shripad; Tatake, Prashant Anil; Maleppagari, Saikiran; Karipeddi, Rama Tejaswi; Dhanapal, Prem Kumar; and Kumar, Arvind.
The application for the patent was published on Nov. 14, under issue no. 46/2025.
According to the abstract released by the Intellectual Property India: "The invention relates to a batch process for preparing a polyether alcohol P having a hydroxyl number of greater than 115 mg KOH/g by reacting starter compound S1 and starter compound S2, with one or more alkylene oxides in the presence of a composite metal cyanide complex catalyst, comprising a) forming a starter mixture comprising starter compound S1 and the catalyst and activating the catalyst by adding an alkylene oxide, followed by b) continuously adding an alkylene oxide; and c) continuously adding starter compound S2; wherein no alkylene oxide is added between steps a) and b), and the continuous addition of alkylene oxide in step b) is not interrupted before the total weight of alkylene oxide needed to prepare polyether alcohol P has been added; step c) is stopped before step b) is stopped and step c) is stopped once less than 80% of the total weight of alkylene oxide needed to prepare polyether alcohol P has been added in step b)."
The patent application was internationally filed on Feb. 27, 2024, under International application No.PCT/EP2024/054908.
Disclaimer: Curated by HT Syndication.
