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公开(公告)号：US20200207707A1
公开(公告)日：2020-07-02
申请号：US16731551
申请日：2019-12-31
IPC分类号： C07C277/08
摘要： The present invention pertains to a process for preparing guanidino acetic acid (GAA) from cyanamide and glycine in alkaline process solution, in which anionic impurities are removed from the process solution by electrodialysis.
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公开(公告)号：US20220227706A1
公开(公告)日：2022-07-21
申请号：US17618145
申请日：2020-06-08
发明人： Jürgen BILZ , Cornelia BORGMANN , Achim FISCHER , Lucas GEIST , Anja NORDSCHILD , Christian RENNER , Christian REUS , Axel RONNEBURG
IPC分类号： C07C319/20
摘要： The present invention relates to a process for the preparation of methionine comprising the step of contacting a solution or suspension comprising 2-amino-4-(methylthio)butanenitrile and/or 2-amino-4-(methylthio)butaneamide with water in the presence of a catalyst to give a methionine comprising mixture, wherein the catalyst comprises CeO2 comprising particles, wherein the CeO2 comprising particles have a BET surface area of from 175 to 300+/−10% m2/g measured according to DIN ISO 9277-5 (2003), a mean maximum Feret diameter xFmax, mean of from 3+/−10% to 40+/−10% nm and a mean minimum Feret diameter xFmin, mean of from 2+/−10% to 30+/−10% nm, both measured according to DIN ISO 9276-6 (2012).
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公开(公告)号：US20220089533A1
公开(公告)日：2022-03-24
申请号：US17420824
申请日：2020-02-03
发明人： Juergen BILZ , Cornelia BORGMANN , Achim FISCHER , Lucas GEIST , Anja NORDSCHILD , Christian RENNER , Christian REUS , Axel RONNEBURG
IPC分类号： C07C319/20
摘要： The present invention relates to a process for the preparation of methionine comprising the step of contacting a solution or suspension comprising 2-amino-4-(methylthio)butanenitrile and/or 2-amino-4-(methylthio)butaneamide with water in the presence of a catalyst to give a methionine comprising mixture, wherein the catalyst comprises CeO2 comprising particles, wherein the CeO2 comprising particles comprise from 50 to 100 wt.-% of CeO2, have a BET surface area of from 35 to 65 m2/g measured according to DIN ISO 9277-5 (2003), a mean maximum Feret diameter xFmax, mean of from 10 to 40 nm and a mean minimum Feret diameter xFmin, mean of from 5 to 30 nm, both measured according to DIN ISO 9276-6 (2012).
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公开(公告)号：US20240010594A1
公开(公告)日：2024-01-11
申请号：US18040015
申请日：2021-07-13
发明人： Timo STAHL , Patrik STENNER , Axel RONNEBURG , Julian TEICHMANN
IPC分类号： C07C51/145 , C25B3/07 , C25B11/043 , C25B11/046 , C25B3/23
CPC分类号： C07C51/145 , C25B3/07 , C25B11/043 , C25B11/046 , C25B3/23
摘要： A method for preparing 3-hydroxy-3-methylbutyric acid (HMB) or salts thereof from tertbutanol and carbon monoxide, may include reacting tert-butanol in an aqueous mixture with carbon monoxide under electrolytic conditions. The electrolytic conditions may include applying an electric potential to the aqueous reaction mixture in a range of from 1.5 and 25 V and/or operating electrodes at a current density in a range of from 1 to 10.000 A/m2. The electric potential may be applied to the aqueous mixture using a diamond anode and/or a steel cathode. The reaction may be conducted in the presence of at least one conducting electrolyte.
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公开(公告)号：US20220204435A1
公开(公告)日：2022-06-30
申请号：US17600289
申请日：2020-03-25
发明人： Timo STAHL , Axel RONNEBURG , Imad MOUSSALLEM , Juliette HALLI , Petra PICHA
IPC分类号： C07C51/08 , C07D301/12
摘要： The present invention pertains to a process for preparing 3-hydroxy-3-methylbutyrate (HMB) or a salt thereof, the method comprising (a) reacting isobutylene oxide with cyanide in order to obtain 3-hydroxy-3-methylbutyronitrile, and (b) hydrolyzing the 3-hydroxy-3-methylbutyronitrile obtained in step (a) in order to obtain HMB, wherein hydrolysis step (b) is performed using either at least one nitrilase enzyme or, alternatively, using a combination of enzymes, said combination comprising at least one nitrile hydratase and at least one amidase.
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