TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method further involves filtering the solution, where filtering the solution involves filtering with a solid filter and a filter aid. Subjecting the solution to a reductant involves reducing with an electrochemical reaction using at least one electrode, where the at least one electrode is comprised of at least one material from the set of titanium, carbon felt, glassy carbon, graphite, polypropylene graphite composite, iron, steel, and mixed metal oxide; or adding an inorganic reducing agent to the solution; or adding an organic reducing agent to the solution; or adding iron powder to the solution. Adding an inorganic reducing agent to the solution involves adding less than a stoichiometric amount of the inorganic reducing agent to the solution. The method further involves adjusting the solution to form an electrolyte. Less than stoichiometric amount (preferably one equivalent) of the organic reducing agent is added to the solution. Preferred Components: The source of chromium ions contains a soluble dichromate salt of sodium or potassium; or a soluble chromate salt of sodium or potassium; or chromium trioxide. The acidic solution contains at least one of the acids selected from hydrochloric acid, hydrobromic acid, sulfuric acid, sulfonic acid, phosphoric acid, phosphonic acid, perchloric acid, and carboxylic acids (preferably hydrochloric acid). The inorganic reducing agent contains sodium dithionite, sodium bisulfate, sodium metabisulfite, and sodium sulfite.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic reducing agent contains at least one of formic acid, oxalic acid, methanol, ethanol, lower alcohol, ethylene glycol, glucose, sucrose, raw sugar, and molasses. EXAMPLE - To a solution of CrO3 (150 g) in 8M HCl (1000 ml), glucose (50 g) was added in small amounts over 4.5 hour during which time the temperature varied from 33-97 degrees C. After 12 hours, when the solution cooled to ambient temperature, Fe powder (325 mesh, 55.85 g) was added over 6.5 hour. After the addition was complete, the mixture was stirred for 16 hours. The mixture was then filtered. The acid concentration was raised by passing HCl gas into the solution. The concentrations of Cr and Fe were measured by spectroscopy to be 1.5 M and 1.3 M, respectively. The acid concentration was measured by pH titration to be 2.58 M. Concentrations of other elements measured were: C 3500 parts per million (ppm); Co 0.0051 ppm; Ni 0.99 ppm; and Cu 0.076 ppm.