Abstract: A process for producing stable, high purity ferrate (VI) employing beta-ferric oxide (beta-Fe.sub.2 O.sub.3), and preferably monohydrated beta-ferric oxide (beta-Fe.sub.2 O.sub.3.H.sub.2 O) as the iron source. An improved process for producing stable, high purity beta-ferric oxide is also disclosed. The process results in the efficient and effective productions of ferrate with high yields and small amounts of waste production. A large portion of the unused product stream can be recycled to the ferrate reactor for the production of additional ferrate.

Abstract: A process for producing stable, high purity ferrate (VI) employing beta-ferric oxide (beta-Fe.sub.2 O.sub.3) and as the iron source. The process results in the efficient and effective productions of ferrate with high yields and small amounts of waste production.

Abstract: A process for producing stable, high purity ferrate (VI) employing beta-ferric oxide (beta-Fe.sub.2 O.sub.3), and preferably monohydrated beta-ferric oxide (beta-Fe.sub.2 O.sub.3 .multidot.H.sub.2 O) as the iron source. An improved process for producing stable, high purity beta-ferric oxide is also disclosed. The process results in the efficient and effective productions of ferrate with high yields and small amounts of waste production. A large portion of the unused product stream can be recycled to the ferrate reactor for the production of additional ferrate.

Abstract: A process of treating water to remove transuranic elements contained therein by adjusting the pH of a transuranic element-containing water source to within the range of about 6.5 to about 14.0, admixing the water source with an alkali or alkaline earth ferrate in an amount sufficient to form a precipitate within the water source, the amount of ferrate effective to reduce the transuranic element concentration in the water source, permitting the precipitate in the admixture to separate and thereby yield a supernatant liquid having a reduced transuranic element concentration, and separating the supernatant liquid having the reduced transuranic element concentration from the admixture is provided. Additionally, a water soluble salt, e.g., a zirconium salt, can be added with the alkali or alkaline earth ferrate in the process to provide greater removal efficiencies. A composition of matter including an alkali or alkaline earth ferrate and a water soluble salt, e.g., a zirconium salt, is also provided.

Abstract: A process for preparing doped barium and strontium hexaferrite compounds having the formula (I):Afe.sub.12-r-s M.sub.r N.sub.s O.sub.19 (I)wherein A is barium or strontium; M is cobalt, zinc, nickel; N is titanium or ruthenium and r and s are individually in the range from about 0.1 to about 1.2, said process comprising:(a) forming particles of a doped Fe.sub.3 O.sub.4 /ACO.sub.3 co-precipitate wherein A is defined above from (i) a ferric compound, (ii) a ferrous compound, (iii) a barium or strontium compound, (iv) a cobalt, zinc or nickel compound, (v) a titanium or ruthenium compound and (vi) alkali metal carbonate;(b) suspending the doped Fe.sub.3 O.sub.4 /ACO.sub.3 particles in a concentrated aqueous solution of an alkali halide;(c) spray drying said suspension to form a dried powder comprising said doped Fe.sub.3 O.sub.4 /ACO.sub.3 particles distributed onto the surfaces of the high temperature-melting alkali halide crystals;(d) calcining said dried powder at a temperature from about 700.degree. C.

Abstract: 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).

Abstract: Described is an electrolytic process for producing sodium ferrate [Fe(VI)] in a membrane-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 membrane material for 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, sulfunic or other inorganic exchange sites.

Abstract: Described is a process for making potassium ferrate by the formation of sodium ferrate in a membrane-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. 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 membrane material for 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.

Abstract: Disclosed is a process for making potassium ferrate (K.sub.2 FeO.sub.4) by reacting substantially pure KOH, C1.sub.2, and a ferric salt in the presence of a stabilizing proportion of at least one ferrate-stabilizing compound (e.g., a combination of an alkali metal silicate and an alkali metal iodine-containing salt). The formed K.sub.2 FeO.sub.4 is separated and recovered from other reaction co-products [KCl, H.sub.2 O, KOCl, and Fe(OH).sub.3 ] and excess KOH. Other specific improvements include the following:(i) returning KCl co-product back to a chlor/alkali membrane-type electrolytic cell and then making very pure KOH and Cl.sub.2 ;(ii) recylcing excess KOH back to the ferrate-forming reaction; and(iii) recovering a substantially pure dry solid K.sub.2 FeO.sub.4 product by washing the above-noted K.sub.2 FeO.sub.4 product in DMSO or its equivalent; and then washing with methanol or its equivalent, before drying.