Invention Grant
US09562006B2 Preparation of symmetrical and asymmetrical disulphides by reactive distillation of mixtures of disulphides
有权
通过二硫化物混合物的反应蒸馏制备对称和不对称二硫化物
- Patent Title: Preparation of symmetrical and asymmetrical disulphides by reactive distillation of mixtures of disulphides
- Patent Title (中): 通过二硫化物混合物的反应蒸馏制备对称和不对称二硫化物
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Application No.: US14421344Application Date: 2013-08-27
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Publication No.: US09562006B2Publication Date: 2017-02-07
- Inventor: Georges Fremy
- Applicant: Arkema France
- Applicant Address: FR Colombes
- Assignee: Arkema France
- Current Assignee: Arkema France
- Current Assignee Address: FR Colombes
- Agency: RatnerPrestia
- Priority: FR1258110 20120830
- International Application: PCT/FR2013/051974 WO 20130827
- International Announcement: WO2014/033399 WO 20140306
- Main IPC: C07C319/24
- IPC: C07C319/24 ; C07C319/28 ; B01J19/12
Abstract:
The invention relates to a process for the preparation of symmetrical or asymmetrical dialkyl disulphides by involving at least one mixture of symmetrical and/or asymmetrical dialkyl disulphides in a basic and/or photochemical catalytic reaction, with joint extraction, preferably continuously, of the symmetrical and/or asymmetrical disulphide(s) which it is desired to obtain.The process of the invention is particularly suited to the preparation of dimethyl disulphide or diethyl disulphide from a mixture of symmetrical and/or asymmetrical dialkyl disulphides.
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