Method of preparing cobelt chloride with colbalt slag containing Fe and Mg

Application Number: 00122064
Application Date: 2000.08.15
Publication Number: 1337360
Publication Date: 2002.02.27
Priority Information:
International: C01G51/08
Applicant(s) Name: Hengchang Chemical Co., Ltd., Shantou
Inventor(s) Name: Zhuang Jingfa
Patent Agency Code: 00000
Patent Agent:
Abstract The production method of cobalt chloride by using cobalt slag containing iron and manganese includes the folloiwng steps: dissolivng cobalt slag in acid, when the acid-solution is reached to reaction end point, adding a proper quantity of oxidant, using needle ironstone precipitation method to treat reaction liquor to remove iron, adding permanganate to iron-removed filtrate to make Mn (II) being in reaction liquor be oxidated, and made into manganese dioxide, the recovery rate of manganese being in solution is greater than 98%, and recovery rate of manganese being in cobalt slag is greater than 85%, the adding dicarbonate in manganese-removed filtrate to obtain cobalt carbonate, and the recovery rate of cobalt is greater than 95%. The cobalt carbonate can be undergone the processes of hydrochloric acid dissolving, concentrating and crystallizing, and the purity of coblat chloride crystal is above 95%. It is specially applicable to prepare cobalt chloride by uisng cobalt slag produced by using low-pressure carbonylation to synthesize phenylacetic acid, and its by-product manganese dioxide can be used as resource.