Process for making a calcium/sodium ferrate adduct by the electrochemical formation of sodium ferrate

Patent · Tue May 29 00:00:00 EDT 1984

OSTI ID:6507386

Deininger, J P; Dotson, R L

Described is a process for making a calcium/sodium ferrate adduct with sodium ferrate in a divided-type electrolysis cell. The anolyte chamber of the cell is charged with an aqueous solution of sodium hydroxide and a sodium ferrate-stabilizing proportion of at least one sodium halide salt. The anolyte chamber additionally contains ferric ions (Fe(III)). The catholyte chamber contains an aqueous sodium hydroxide solution during operation. The source of ferric ion in the anolyte may be either an iron-containing anode or at least one iron-containing compound present in the anolyte solution or both. The preferred material separating the anolyte chamber from the catholyte chamber is comprised of a gas- and hydraulic-impermeable, ionically-conductive, chemically-stable ionomeric film (e.g., a cation-exchange membrane with carboxylic, sulfonic or other inorganic exchange sites). Sodium ferrate is prepared in the anolyte chamber by passing an electric current and impressing a voltage between the anode and cathode of the cell. During electrolysis, sodium ferrate forms in the aqueous sodium hydroxide anolyte. This anolyte is reacted with a calcium compound to produce a calcium/sodium ferrate adduct. Alternatively the sodium ferrate may be first recovered in a solid form and then reacted with a calcium compound to produce said adduct.

• Assignee: Olin Corporation
• Patent Number(s): US 4451338
• OSTI ID: 6507386
• Resource Relation: Patent File Date: Filed date 2 May 1983; Other Information: PAT-APPL-490756
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM COMPOUNDS
ELECTROLYSIS
FERRATES
SODIUM COMPOUNDS
ADDUCTS
AQUEOUS SOLUTIONS
CHEMICAL PREPARATION
ELECTROCHEMISTRY
ELECTROLYTIC CELLS
SODIUM HYDROXIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHEMISTRY
DISPERSIONS
HYDROGEN COMPOUNDS
HYDROXIDES
IRON COMPOUNDS
LYSIS
MIXTURES
OXYGEN COMPOUNDS
SOLUTIONS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
400400* - Electrochemistry