The method of preparing the cobalt from the cobalt ammine complex products

The present invention discloses a cobalt ammine complex solution is heated to a process for the preparation of cobalt-cobalt ammine complex product, to be processed first, and then adding a reducing agent After completion of the reaction heat. Sodium hydroxide solution was added dropwise with stirring to a solution of an oxalate or cobalt ammine complex solution after pretreatment, the reaction was started after the completion of the dropwise addition. After completion of the reaction material filtered off with suction, the precipitate obtained filtered off with suction and washed to obtain cobalt hydroxide or cobalt oxalate after drying, complete cobalt recovery. The present invention is a simple process safety, the first reduction of the cobalt ammine complex, the cobalt is reduced to trivalent cobalt-II, followed by addition of sodium hydroxide or sodium oxalate, or ammonium oxalate to divalent cobalt ammine complex, the cobalt precipitate to give thereof. Reducing agent may destabilize the trivalent cobalt ammine complex, the cobalt ammine complex after reduction easier and sodium hydroxide or oxalate reaction, thereby improving the recovery efficiency and recovery of cobalt, cobalt prepared high product purity.