An Improved Method of Treating Antimonial Ores or Compounds for the Production of Pigment.
Year: 1885

page_text: רוּ
An Improved Method of Treating Antimonial Ores or Compounds
for the Production of Pigment.
We, THOMAS CHILDS HUNTINGTON, and MARCO CHIAPPONI, both of Pertusola,
near Spezzia, in the Kingdom of Italy, Engineers, do hereby declare the nature of
this invention to be as follows:-
This Invention relates to an improved method of procuring pigment from ores or
compounds containing Antimony, and consists in the employment of the Sulphides
and Polysulphides of the alkalies or of the alkaline earths in order to effect the
solution of the compounds of antimony contained in the ores or compounds to be
operated upon and then effecting the precipitation of the compounds of Antimony
contained in thé solution of the combined employment of carbonic acid and of air.
In carrying out this Invention, the ores or compounds containing Antimony
are reduced to a finely divided condition and in this state are treated in some
conveniently adapted receptacle with either an aequeous solution of a Sulphide or
of Sulphides of the alkalies or of the alkaline earths, and by preference Sulphide
of Barium, in some instances adding a certain proportion of sulphur; and in order
to 'accelerate the solution of the compounds of Antimony, heat may be applied.
When the solution of the antimonial compounds has been effected, it is run off
into a second receptacle, and through this solution a combined current of air and
of carbonic acid is caused to pass. This combined current firstly precipitates' from
the solution, in the form of carbonate, the carbonates of the alkaline earths (should
their soluble Sulphides have been employed); and the precipitate is then separated
by decantation or otherwise.
4.
The passage of the combined current of air and of carbonic acid through the
decanted solution is continued until the whole of the Antimony is precipitated as a
byposulphite. This precipitate is collected on filters or otherwise; and, having
been dried, is ready for use as pigment.
'
The carbonic acid employed may be obtained by any of the ordinary methods
used in the arts and manufactures.

page_text: An Improved Method of Treating Antimonial Ores or Compounds
for the Production of Pigment.
We, THOMAS CHILDS HUNTINGTON and MARCO CHIAPPONI, both of Pertusola,
near Spezzia, in the Kingdom of Italy, Engineers, 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 :-
This invention relates to an improved method of procuring pigment from ores or
compounds containing antimony, and consists in the employment of the sulphides
and polysulphides of the alkalies or of the alkaline earths in order to effect the
solution of the compounds of antimony contained in the ores or compounds to be
operated upon and then effecting the precipitation of the compounds of antimony,
contained in the solution by the combined employment of carbonic acid and of air.
In carrying out this invention, the ores or compounds containing antimony
are reduced to a finely divided condition; and in this state are treated in some
conveniently adapted receptacle with either an aqueous solution of a sulphide or of
sulphides of the alkalies or of the alkaline earths and by preference sulphide of
barium, in some instances adding a certain proportion of sulphur; and in order to
accelerate the solution of the compounds of antimony, heat may be applied
When the solution of the antimonial compound has been effected, it is run off
into a second receptacle and through this solution a combined current of air and of
carbonic acid is caused to pass. This combined current firstly precipitates from
the solution in the form of carbonate the carbonates of the alkaline earths (should
their soluble sulphides have been employed), and the precipitate is then separated
by decanting the solution, or otherwise.
The passage of the combined current of air and of carbonic acid through the
decanted solution is continued until the whole of the antimony is precipitated as a
hyposulphite. This precipitate is collected on filters, or otherwise; and having
been dried, is ready for use as pigment.
The carbonic acid employed may be obtained by any of the ordinary methods
used in the arts and manufactures for the purpose.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is ;-
First The herein described method of producing pigment by submitting
antimonial ores or compounds to the action of a solution of the soluble alkalies or
alkaline earthy sulphides so as to effect the solution and separation of the anti-
monial compounds contained therein.
Secondly The use, in treating antimonial ores or compounds for the production
of pigment, of an aqueous solution of sulphide of barium substantially as herein
described

page_text: Thirdly-In the production of pigment from antimonial ores or compounds,
effecting the separation from the solution first of the alkaline earths existing as
sulphides or as carbonates, and secondly of the antimony in the form of hypo-
sulphite by the combined employment of carbonic acid and of atmospheric air
substantially in the manner herein described.
Fourthly: The pigment consisting of the precipitate resulting from the
treatment of antimonial ores or compounds substantially in the manner herein
described.
G. G. M. HARDINGHAM,
Agent for the Applicants.