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1. 发明授权

US10844009B2 Process for preparing guanidino acetic acid 有权
公开(公告)号：US10844009B2
公开(公告)日：2020-11-24
申请号：US16731551
申请日：2019-12-31
申请人： Evonik Operations GmbH
发明人： Timo Stahl , Patrik Stenner , Cornelia Borgmann , Christian Renner , Axel Ronneburg
IPC分类号： C07C277/08
CPC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.

2. 发明授权

US11056633B2 Rational method for the powder metallurgical production of thermoelectric components 有权
公开(公告)号：US11056633B2
公开(公告)日：2021-07-06
申请号：US16069310
申请日：2017-01-06
申请人： Evonik Operations GmbH
发明人： Sascha Hoch , Magdalena Kern , Patrik Stenner , Jens Busse , Mareike Giesseler , Wolfgang Deis , Zeljko Rajic
IPC分类号： H01L35/34 , B22F3/105 , B22F3/14 , B22F7/08
摘要： A method can produce a thermoelectric component or at least a semifinished version of the thermoelectric component. The method includes: a) providing a substantially planar substrate; b) providing a pulverulent thermoelectrically active material; c) pressing the active material to form green bodies; d) inserting green bodies into through-holes of the substrate; e) arranging the substrate with the green bodies inserted therein between two substantially planar electrodes; f) contacting face ends of the green bodies with the electrodes; g) exposing the green bodies to an electric current flowing between the electrodes; h) exposing the green bodies to a pressure force acting between the electrodes; i) sintering the green bodies to form thermolegs; and k) levelling the substrate and the thermolegs accommodated therein by bringing them closer to the electrodes while maintaining the parallelity thereof.

3. 发明申请

US20200157045A1 Process for preparing methionine 审中-公开
公开(公告)号：US20200157045A1
公开(公告)日：2020-05-21
申请号：US16605090
申请日：2018-05-09
申请人： Evonik Operations GmbH
发明人： Daniel Fischer , Patrik Stenner , Sebastian Bernhardt , Harald Jakob
IPC分类号： C07C319/14 , C07C319/28 , C07C323/58
摘要： A process is used for preparing methionine. Specifically, the process includes the hydrolysis of 5-(2-methylmercaptoethyl)hydantoin (methionine hydantoin) in an alkaline process solution. Further, the by-products that include formate and other anions of organic acids containing 1 to 5 carbon atoms are removed by electrodialysis of the process solution.

4. 发明公开

US20240352606A1 BREAK-RESISTANT PARTITION WALL COMPRISING SOLID ELECTROLYTE CERAMICS FOR ELECTROLYTIC CELLS 审中-公开
公开(公告)号：US20240352606A1
公开(公告)日：2024-10-24
申请号：US18292986
申请日：2022-07-19
申请人： Evonik Operations GmbH
发明人： Philip Heinrich Reinsberg , Michael Horn , Patrik Stenner , Tobias Stadtmüller , Johannes Ruwwe , Jutta Malter
IPC分类号： C25B13/07 , C25B3/07 , C25B3/13 , C25B9/60
CPC分类号： C25B13/07 , C25B3/07 , C25B3/13 , C25B9/60
摘要： The present invention relates, in a first aspect, to a dividing wall W suitable for use in an electrolysis cell E. The dividing wall W comprises a frame element R that forms an edge element RR and a separating element RT. The frame element R comprises two opposite parts R1 and R2, with at least two alkali metal cation-conducting solid-state electrolyte ceramics FA and FB disposed therebetween. The separating element RT lies between alkali metal cation-conducting solid-state electrolyte ceramics encompassed by the dividing wall W and separates these from one another. It is a feature of the invention that the two parts R1 and R2 are secured to one another by at least one securing element BR at the edge element RR and at least one securing element BT at the separating element RT.
Compared to the cases according to the prior art in which the dividing wall W encompasses the solid-state electrolyte in one piece, this arrangement is firstly more flexible since the individual ceramics have more degrees of freedom available in order to react to fluctuations in temperature, for example by shrinkage or expansion. This increases stability with respect to mechanical stresses in the ceramic. At the same time, the mechanical stability of the arrangement of the at least two solid-state electrolyte ceramics between the parts R1 and R2 is increased in that the parts R1 and R2 are secured to one another both at the edge element RR and at the separating element RT by at least one securing element BR or BT.
In a second aspect, the present invention relates to an electrolysis cell E encompassing a cathode chamber KK divided by the dividing wall W from the adjacent chamber, which is the anode chamber KA or a middle chamber KM of the electrolysis cell E.
In a third aspect, the present invention relates to a process for producing an alkali metal alkoxide solution in the electrolysis cell E according to the second aspect of the invention.

5. 发明公开

US20230264961A1 FUNCTIONALIZED GRAPHENE, METHOD FOR PRODUCING A FUNCTIONALIZED GRAPHENE, AND ITS USE 审中-公开
公开(公告)号：US20230264961A1
公开(公告)日：2023-08-24
申请号：US18003619
申请日：2021-06-15
申请人： Evonik Operations GmbH
发明人： Valeri Leich , Jonas Hönig , Julian Teichmann , Silvia Blank-Shim , Stefan Schumann , Verena Breuers , Patrik Stenner
IPC分类号： C01B32/194 , C08K9/06 , C09D7/62 , C10M125/02 , H01M4/587
CPC分类号： C01B32/194 , C08K9/06 , C09D7/62 , C10M125/02 , H01M4/587 , C01P2006/11 , C01P2006/10 , C01P2006/42 , C10M2203/003 , C10M2201/14 , C10N2040/04
摘要： A process can be used for the functionalization of graphene material by mixing graphene material with at least one silane. The functionalized graphene material is useful, for example, in thermoplastics.

6. 发明授权

US10800736B2 Process for preparing methionine 有权
公开(公告)号：US10800736B2
公开(公告)日：2020-10-13
申请号：US16605090
申请日：2018-05-09
申请人： Evonik Operations GmbH
发明人： Daniel Fischer , Patrik Stenner , Sebastian Bernhardt , Harald Jakob
IPC分类号： C07C319/20 , C07C319/14 , C07C319/28 , C07C323/58
摘要： A process is used for preparing methionine. Specifically, the process includes the hydrolysis of 5-(2-methylmercaptoethyl)hydantoin (methionine hydantoin) in an alkaline process solution. Further, the by-products that include formate and other anions of organic acids containing 1 to 5 carbon atoms are removed by electrodialysis of the process solution.

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