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US 11,339,411 B2Granted
Process to prepare elemental sulphur
AssigneePaqell B.V.
InventorsJohannes Bernardus Maria Klok, Annemiek Ter Heijne, Frederikus De Rink, Cees Jan Nico Buisman
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Abstract
The invention is directed to a process to prepare elemental sulphur by (i) contacting an aqueous solution comprising bisulphide with oxidised sulphide-oxidising bacteria under anaerobic conditions wherein elemental sulphur is produced and a reduced sulphide-oxidising bacteria is obtained and (ii) wherein the reduced sulphide-oxidising bacteria are oxidised by transfer of electrons to an anode of an electrochemical cell to obtain the oxidised sulphide-oxidising bacteria.
Claims12
A process to prepare elemental sulphur by
- contacting an aqueous solution comprising bisulphide with oxidised sulphide-oxidising bacteria under anaerobic conditions wherein elemental sulphur is produced and a reduced sulphide-oxidising bacteria is obtained and isolating elemental sulphur from the aqueous solution;
- wherein the reduced sulphide-oxidising bacteria are oxidised by transfer of electrons to an anode of an electrochemical cell to obtain the oxidised sulphide-oxidising bacteria;
- and
- wherein the electrochemical cell comprises a cathode which transfers electrons to a compound having a more positive electrode potential than the electrode potential of the reduced sulphide-oxidising bacteria and wherein as a result of this difference in potential between anode and cathode an electric current between said electrodes results.
1 more element
Dependencies are inferred from the claim text.