Recovery of manganese using molasses as reductant in nitric acid solution

An overview on potential hydrometallurgical processes for separation and recovery of manganese

“…Chemicals, both organic and inorganic, are utilised as reducing agents in the leaching process. To make this process eco-friendlier and more cost effective, new low-cost reductants such as carbohydrates [16], molasses [17], sawdust [18], and waste paper [19] are being utilised as reducing agents. Following the traditional hydrometallurgical technique, the recovery of Mn (II) has been scrutinised from low-grade manganese ores by leaching in sulphuric acid medium without using reducing agents.…”

Dissolution of Manganese from Polymetallic Material Using Sulfuric-Oxalic Acid Medium

“…Several local leaching studies have actually been performed upon the Mn ores with different constituents and grades of the economic metal values. These studies include those of Amer [21] [22], El Hazek et al [23] and Lasheen et al [24]. Thus, Amer [21] [22] investigated the leaching characteristics of U, Cu and Mn from a similar ore material by pug leaching using H 2 SO 4 acid-as well as using Fe 2 (SO 4 ) 3 or FeCl 3 as lixiviants.…”

“…El Hazek et al [23] investigated manganese leaching from a low-grade ore (about 11% MnO) from Sinai using hydrochloric acid in the presence of hydrogen peroxide as a reducing agent. On the other hand, Lasheen et al [24] have also studied the recovery of manganese and some associated metal values from a more rich ore material (48.4% MnO) using nitric acid medium in presence of molasses as reductant.…”

Manganese recovery from secondary resources: A green process for carbothermal reduction and leaching of manganese bearing hazardous waste

“…Akdogan and Eric [23] reduced manganese ore using carbon and carbon monoxide in the temperature range of 1100-1350 • C. Literature survey also reveals that partially reduced manganese dioxide is highly reactive in acid/alkaline medium. Manganese dioxide can be leached in ammonical solution (containing ammonia and ammonium salt) [24,25], SO 2 [26,27], FeSO 4 solution [28] and dilute nitric acid [29,30] as well as in dilute hydrochloric [31][32][33]. Abbruzzese et al [34] achieved maximum leaching of manganese values from low grade manganese ores with aqueous SO 2 or through bio-leaching using heterotrophic micro-organisms in 15-20 days operation.…”