A. Process of Separating Cobalt from Nickel.
Year: 1891

page_text: Date of Application, 11th Nov., 1891
Complete Specification Left, 10th Aug., 1892--Accepted, 29th Oct., 1892
PROVISIONAL SPECIFICATION.
A. Process of Separating Cobalt from Nickel.
I, GUSTAV SELVE of Altena, Westphalia in the German Empire, Royal
Councillor of Commerce, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to separate cobalt from sulphuric or hydrochloric
lyes, such as Co₂O, containing only cobalt and nickel by means of hypochlorite of
soda, mixed in given proportions with an aqueous solution of carbonate of soda.
The course of the process is indicated by the following equation;
The precipitating liquid is obtained by adding to the aqueous solution of hypo-
chlorite of soda, composed of 100 kilogrammes of chloride of lime and soda,-
60 kilogrammes of calcined soda dissolved in water. When the precipitated
carbonate of lime has settled, the liquid is drawn off and may then be used as a
precipitant as before stated. Instead of the hypochlorite of soda being obtained
from chloride of lime, it evidently may be produced in some other manner, a
quantity of soda solution, corresponding to the above formula being added to it.
The separation of cobalt takes place as follows:
The raw material, chiefly containing Co and Ni is dissolved in sulphuric or
muriatic acid; the foreign substances existing besides Ni and Co (such as
Fe, Al, Cu, etc.) are separated according to well known methods; then, while the
material is maintained in ebullition and stirred, the precipitating liquid is slowly
added, until a sample shows that the whole of the cobalt (Co,O3) is separated in
the shape of a black deposit, the nickel remaining in this solution.
Small quantities of NiO precipitated at the same time may be dissolved again by
treating the deposit of cobalt with dilute sulphuric or muriatic acid.
Dated this 11th day of November 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Process of Separating Cobalt from Nickel.
I, GUSTAV SELVE of Altena, Westphalia in the German Empire, Royal
Councillor of Commerce, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of this invention is to separate cobalt from sulphuric or hydrochloric
lyes, such as Co₂O, containing only cobalt and nickel, by means of hypochlorite of
soda, mixed in given proportions with an aqueous solution of carbonate of soda.
Price 8d 1

page_text: The precipitating liquid is obtained by adding to the aqueous solution of hypo-
chlorite of soda,-composed of 100 kilogrammes of chloride of lime and soda,-
60 kilogrammes of calcined soda dissolved in water. When the precipitated
carbonate of lime has settled, the liquid is drawn off and may then be used as a
precipitant as before stated. Instead of the hypochlorite of soda being obtained
from chloride of lime, it evidently may be produced in some other manner, a
quantity of scda solution, corresponding to the above formula, being added to it.
The separation of cobalt takes place as follows:-
The raw material, chiefly containing Co and Ni is dissolved in sulphuric or
muriatic acid; the foreign substances existing besides Ni and Co (such as
Fe, Al, Cu, etc.) are separated according to well known methods; then, while the
material is maintained in ebullition and stirred, the precipitating liquid is slowly
added, until a sample shows that the whole of the cobalt (Co,O) is separated in the
shape of a black deposit, the nickel remaining in this solution.
Small quantities of NiO precipitated at the same time may be dissolved again
by treating the deposit of cobalt with dilute sulphuric or muriatic acid.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
The separation of cobalt from nickel in a solution of hydrochloric or sulphuric
acid by precipitating the cobalt with the addition of equivalent quantities of
carbonate and hypochlorite of soda.
Dated this 10th day of August 1809
W. P. THOMPSON & BOULT,
Agents for the Applicant.