Method for preparing disodium 2,2'-dithiobis(ethanesulphonate)
US6936733B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jul 17, 2001 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Sep 25, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a novel method for industrial preparation of disodium 2,2′-dithiobis(alkylsulphonates), and in particular disodium 2,2′-dithiobis(ethanesulphate) (dimesna). Said novel method is summarized by the reaction diagram (A). In diagram (A), Hal represents a halogen atom, and preferably a bromine atom; M represents a sodium or potassium atom; and n represents an integer ranging between 0 and 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.