Method for reducing molybdenum impurity in manganese nitrate by organic solvent extraction process

Abstract

The invention relates to a method for reducing molybdenum impurity in manganese nitrate by an organic solvent extraction process. The method comprises the following steps: heating unqualified manganese nitrate by using tetrachloroethylene, performing refluxing for dissolving to prepare a tetrachloroethylene solution of manganese nitrate, naturally filtering the obtained solution by a filter paper,recovering the tetrachloroethylene solvent, for cycle use, by using a distillation device, and carrying out cooling crystallization on residues obtained after the distillation in order to obtain qualified manganese nitrate. The manganese nitrate and molybdenum nitrate have different solubilities in tetrachloroethylene, so the manganese nitrate and molybdenum nitrate are conveniently separated byusing the tetrachloroethylene as the solvent, thereby the method has the advantages of simple process, easiness in operation, stable product quality, recycling of the solvent tetrachloroethylene, andresource saving; the method also has the advantages of no discharge of a waste liquid in the preparation process, small consumption of the raw material, great reduction of the production cost, high economic benefit and friendliness to the environment; and the manganese nitrate obtained by the method is an analytically pure reagent, and can be widely used in fields of electronics, chemicals, electroplating and catalyst manufacturing.

Description

technical field [0001] The invention belongs to the technical field of production of fine chemical products, in particular to a method for reducing molybdenum impurities in manganese nitrate by using an organic solvent extraction method. Background technique [0002] Manganese and molybdenum are both ferrous elements with similar properties, and the two are not easy to separate. If the molybdenum impurity in manganese nitrate exceeds the standard, it is very troublesome to remove molybdenum. At present, manganese ammonia precipitation method is generally used, and the reaction conditions are strictly controlled, so that manganese nitrate is converted into manganese hydroxide precipitation, and molybdenum remains in the mother liquor. This method is not easy to operate. Easy, a little carelessness will fail, fail to meet the requirements, and the loss of manganese nitrate is more, time-consuming, laborious, and costly. [0003] After searching, no patent publications related...

AI Technical Summary

Problems solved by technology

If the molybdenum impurity in manganese nitrate exceeds the standard, it is very troublesome to remove molybdenum. At present, manganese ammonia precipitation method is generally used, and the reaction conditions are strictly controlled, so that manganese nitrate is converted into manganese hydroxide precipitation, and molybdenum remains in the mother liquor. This method is not easy to operate. Easy, a little carelessness will fail, fail to meet the requirements, and the loss of manganese nitrate is more, time-consuming, laborious and costly

[0003] After searching, no patent publications related to the patent application of the present invention have been found