MUMBAI, India, May 30 -- Intellectual Property India has published a patent application (202517043587 A) filed by Basf Se, Ludwigshafen am Rhein, Germany, on May 5, for 'epoxidation catalyst.'
Inventor(s) include Karpov, Andrey; Choi, Sung Yeun; Holzmeister, Phil Jack; Walsdorff, Christian; and Bartosch, Christian.
The application for the patent was published on May 30, under issue no. 22/2025.
According to the abstract released by the Intellectual Property India: "An epoxidation catalyst comprises silver, cesium, rhenium and tungsten deposited on a low silicon alpha-alumina support which comprises at least 50 wt.-% of alpha-alumina, and an amount of silicon cS-Si of at most 8.9 mmol per kg of support, and the catalyst further comprises potassium and optionally sodium. The catalyst comprises 25 to 50 wt.-% of silver, an amount of cesium cCs of at least 6.0 mmol per kg of catalyst, an amount of rhenium CRe of at least 6.0 mmol per kg of catalyst, an amount of tungsten Cw of at least 3.0 mmol per kg of catalyst, an amount of potassium CK of at least 3.0 mmol per kg of catalyst, and an amount of sodium CNa of at most 4.0 mmol per kg of catalyst. The catalyst has a value of PA (Formula (I)) in the range of 0.62 to 0.76. The catalyst allows for a more efficient conversion of ethylene oxide by gas-phase oxidation of ethylene, displaying high initial selectivity and activity as well as maintenance of selectivity over time. A process for preparing the epoxidation catalyst comprises i) impregnating a low silicon alpha-alumina support with a silver impregnation solution and ii) subjecting the impregnated refractory support to a calcination process, wherein steps i) and ii) are optionally repeated, and at least one silver impregnation solution comprises rhenium, tungsten, cesium, potassium, and optionally sodium."
The patent application was internationally filed on Oct. 12, 2023, under International application No.PCT/EP2023/078309.
Disclaimer: Curated by HT Syndication.
