| 摘要 |
1517904 Electrolysis of bromide DIAMOND SHAMROCK TECHNOLOGIES SA 27 April 1977 [28 April 1976] 17629/77 Heading C7B Bromide solutions are electrolysed using an anode including a valve metal base, the breakdown potential (NHE) of the passive coating on the base being kept at 2V or above. This may be achieved by (1) using Ti alloyed with 0À5-10% Ta, Zn, Va, Hf or Nb or using Ta or an alloy thereof as base; (2) when using electrocatalytic anodes, adding to the electrolyte 10-10,000 ppm of at least one salt of a metal of Group IIA, IIIA, IVA, VA, VB, VIIB or VIIIB or 10-100 g/l of NO 3 and/or SO 4 ions. In the case of (2), an ammonium type salt may be present e.g. from pyrrole, pyridine or butyl amine. Pure Ta may be used without a catalytic coating at up to 350 A/m<SP>2</SP>./ |
