Green and environment-friendly process for producing cobaltous oxide

The invention relates to an environment-friendly process for producing cobaltous oxide, and belongs to the technical field of battery materials. According to the invention, the precursor formed by oxalic acid or ammonium oxalate, ammonia water and CoCl2. 6H2O can be used for preparing cobaltous oxide with good crystallization and high purity under the condition of low oxygen content; according to the invention, a surfactant polyethylene glycol or sodium dodecyl benzene sulfonate is added in the preparation of a precursor solution, so that uniform dispersion and contact of reactants are facilitated, the reaction efficiency is improved, and meanwhile, the sintering phenomenon of a product in thermal decomposition is inhibited, so that the prepared finished product has good performance; the ammonia washing tower is arranged, so that ammonia water generated in the reaction can be recycled, recycling of the ammonia water is achieved, and pollution in the reaction is reduced; meanwhile, cyclic utilization of resour