Process for the electrochemical production of ammonium polysulfi

Details Process for the electrochemical production of ammonium polysulfi Process for the electrochemical production of ammonium polysulfi

1996-02-14

1997-06-10

Phasge, Arun S.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing inorganic compound

205551, 205554, C23F 1100, C02F 1461

Patent

active

056372060

ABSTRACT:
The ammonium polysulfide is produced in at least one electrochemical cell, to which an aqueous ammonium sulfide solution is supplied as electrolyte. The cell comprises an anode, a gas diffusion cathode, and between the anode and the cathode an electrolyte chamber, where the cell voltage is 0.01 to 5V. The cathode has an electrically conductive, gas-permeable carbon layer, over which flows gas containing free oxygen, and which is in contact with the electrolyte. O.sub.2 -containing gas is introduced into the electrolyte chamber, thereby forming hydroperoxide anions (OOH.sup.-) in the electrolyte chamber. From the electrolyte chamber a solution containing ammonium polysulfide and a residual gas are withdrawn.

REFERENCES:
patent: 4293396 (1981-10-01), Allen et al.
patent: 4765873 (1988-08-01), Chang et al.
Rompps Chemie-Lexikon, Franckh'sche Verlagschandlung, Stuttgart, pp. 3316-3317 (1987) (no month).

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