EP 0331864 B1 19930331 - PREPARATION OF ALKANESULFONYL HALIDES AND ALKANESULFONIC ACIDS
Title (en)
PREPARATION OF ALKANESULFONYL HALIDES AND ALKANESULFONIC ACIDS
Publication
Application
Priority
US 16459988 A 19880307
Abstract (en)
[origin: EP0331864A1] A continuous method is provided for preparing alkanesulfonyl halides, particularly chlorides and alkanesulfonic acids in high yields without the formation of undesirable side-products, and without the net production of hydrogen chloride as a by-product. The method involves the continuous electrolysis of an alkanethiol (RSH) or dialkyl disulfide (RSSR min ) in an aqueous hydrochloric acid-containing solution, continuously removing the electrolyzed product mixture from the electrolysis zone, and recovering the alkanesulfonyl chloride (RSO2Cl) or alkanesulfonic acid (RSO3H) product from the mixture. The alkyl groups in the dialkyl disulfide (R and R min ) may be straight or branched chain, substituted or unsubstituted, have 1 to 20 carbon atoms, preferably 1 to 12 carbon atoms, and may be different, but are preferably the same. The aqueous hydrochloric acid-containing medium and any unreacted sulphur compounds may be recycled through the electrolysis chamber.
IPC 1-7
IPC 8 full level
C25B 3/23 (2021.01)
CPC (source: EP)
C25B 3/23 (2021.01)
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0331864 A1 19890913; EP 0331864 B1 19930331; BR 8900993 A 19891024; DE 68905638 D1 19930506; DE 68905638 T2 19930826; DK 106089 A 19890908; DK 106089 D0 19890306; ES 2039702 T3 19931001; IN 170927 B 19920613; JP H01272786 A 19891031; MX 169944 B 19930802
DOCDB simple family (application)
EP 89100154 A 19890105; BR 8900993 A 19890303; DE 68905638 T 19890105; DK 106089 A 19890306; ES 89100154 T 19890105; IN 1074CA1988 A 19881229; JP 5218889 A 19890306; MX 1455589 A 19890116