초록 ▼

A manufacturing process for nickel (II) hydroxide suitable as active positive electrode material in alkaline electrochemical cells transforms solid Ni(NO3)2 directly into Ni(OH)2 using sodium hydroxide and with the least possible homogeneous solute phase of Ni2+ions. Ni(NO3)2 is deposited on the low

A manufacturing process for nickel (II) hydroxide suitable as active positive electrode material in alkaline electrochemical cells transforms solid Ni(NO3)2 directly into Ni(OH)2 using sodium hydroxide and with the least possible homogeneous solute phase of Ni2+ions. Ni(NO3)2 is deposited on the lower end of a diagonally upward moving conveyor belt, to which concentrated NaOH is supplied from the opposite direction. The depressions in the conveyor belt, which prevent downward sliding of the reaction product, discharge at the upper end Ni(OH)2, together with easily separable NaNO3. At the lower end, the used NaOH is discharged. It can be reconcentrated, after separation of entrained NaNO3, in a vacuum evaporator and reused. The intermediate products of the process are basic nickel nitrates, for example of the composition Ni(NO3)2×Ni(OH)2×6H2O.

대표청구항 ▼

A process for manufacturing nickel hydroxide for use as the active component of the positive electrode mass in alkaline electrochemical cells through reaction between a water soluble nickel(II) salt and alkali hydroxide, wherein the nickel(II) salt in powder form is reacted directly into Ni(OH)2 wit

A process for manufacturing nickel hydroxide for use as the active component of the positive electrode mass in alkaline electrochemical cells through reaction between a water soluble nickel(II) salt and alkali hydroxide, wherein the nickel(II) salt in powder form is reacted directly into Ni(OH)2 with highly concentrated hydroxide, while suppressing a homogeneous solute phase of the Ni2+ions.