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公开(公告)号:US10422778B2
公开(公告)日:2019-09-24
申请号:US15537592
申请日:2015-12-17
申请人: Evonik Degussa GmbH
发明人: Harald Jakob , Benjamin Fonfe , Sebastian Fuss , Andreas Doerflein , Markus Held , Nadine Duerr
摘要: A method for determining dimethyl disulphide proceeds by carrying out a chromatographic separation of an analyte containing at least dimethyl disulphide and methanesulphonic acid, and determining the dimethyl disulphide by pulsed amperometric detection.
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公开(公告)号:US10399934B2
公开(公告)日:2019-09-03
申请号:US15778802
申请日:2016-11-30
申请人: Evonik Degussa GmbH
发明人: Benjamin Fonfe , Nadine Duerr , Harald Jakob , Chiu Kee Cheung , Andreas Doerflein , Sebastian Fuss
IPC分类号: C07C303/00 , B01J19/00 , C07C303/16 , C07C309/04 , C07C309/05
摘要: The present invention relates to a process for preparing alkanesulphonic acid by oxidizing an alkyl mercaptan, a dialkyl disulphide and/or a dialkyl polysulphide having three to nine sulphur atoms with an oxidizing agent, wherein additional oxidizing agent is fed into the oxidation if as yet unoxidized alkyl mercaptan and/or unoxidized dialkyl disulphide and/or at least one intermediate from the oxidation of the dialkyl disulphide and/or of the dialkyl polysulphide is present in the reaction output, and a corresponding apparatus for performance of oxidation reactions.
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