The way hydroxide nickel (ii)

 

(57) Abstract:

The invention relates to the field of production of Nickel compounds, hydroxides, and can be used in the manufacture of alkaline batteries. The method includes obtaining a solution containing Nickel ions and acid balance, the interaction of the resulting solution with an alkali metal hydroxide with subsequent separation of the resulting precipitate and bringing it to the market standard. The initial solution is obtained by interaction of hydrochloric acid, Nickel sulfide and the oxidant. The amount of alkali metal in the reaction mixture after completion of the reaction is 4-10 g/l Drying of the target product are carried out to a moisture content of 20-25%. The technical result - increasing the yield and reducing production costs.

The invention relates to the field of production of Nickel compounds, hydroxides, and can be used in the manufacture of alkaline batteries.

As a prototype of the selected method hydroxide Nickel (II), including the production of a solution of sulfuric acid Nickel, its interaction with sodium hydroxide, separating the precipitate and subsequent cleaning, drying, grinding, Vysshaya school, 1997, - S. 260-277).

The disadvantage of this method is the low yield and the associated high production costs.

The task proposed by the invention is to increase the yield of the product and reduce production costs.

This is accomplished by the fact that in the method including obtaining a solution containing Nickel ions and acid balance, the interaction of the resulting solution with an alkali metal hydroxide, separating the resulting target product, cleaning and drying, the initial solution is obtained by interaction of hydrochloric acid, Nickel sulfide and the oxidant, the amount of alkali metal hydroxide is chosen so that the quantity of alkali metal hydroxide in the reaction mixture after completion of the reaction was 4-10 g/l, and drying the desired product is carried out until the moisture content of 20-25%, after which the obtained product is washed from chlorine ions and dried to marketable condition.

When the value of the quantity of alkali metal hydroxide in the reaction mixture after completion of the reaction obtain the target product of more than 10 g/l basic salts are formed of Nickel chloride, not having an electrochemical capacity, CLASS="ptx2">

When the humidity value at the first drying of the target product more than 25% of the formed amorphous phase hydroxide Nickel (II), do not possess the necessary electrochemical properties, and when the humidity value is less than 20% decreases the quality of the interlayer water in the crystal of Nickel hydroxide and reduces its electrochemical capacity.

The method is as follows.

The addition of sulfide 60 g undergoes dissolution in 200 ml of 36% hydrochloric acid at a temperature of 60oWith the addition of 34.5 g of hydrogen peroxide solution of 30% concentration.

The resulting solution of Nickel chloride being filtered from elemental sulfur and undissolved impurities. After filtration, a solution of Nickel chloride is served for 15 min in a solution of alkali content caustic soda 300 g/l with constant stirring. The residual alkali content in the mother solution after the reaction of the hydroxide Nickel (II) is 7%.

After filtration hydroxide Nickel (II) from the mother liquor it is subjected to the first drying at a temperature of 110-120oC to a residual moisture content of 23%. After this dried precipitate reporterette in demineralized water and subjected Obdach of hydrocele (II) is subjected to a second drying at a temperature of 100-110oC to a residual moisture content of 7%.

The obtained hydroxide Nickel (II) contains 57.5% of Nickel and can be used for the production of alkaline batteries.

The way hydroxide Nickel (II), including the production of a solution containing Nickel ions and acid balance, the interaction of the resulting solution with a hydroxide of an alkali metal, cleaning and drying, characterized in that the starting solution is obtained by interaction of hydrochloric acid, Nickel sulfide and the oxidant, the amount of alkali metal hydroxide is chosen so that the amount of alkali metal in the reaction mixture after completion of the reaction was 4-10 g/l, and drying the desired product is carried out until the moisture content of 20-25%, after which the obtained product is washed from chlorine ions and dried to marketable condition.

 

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