IMPROVEMENTS IN THE TREATMENT OF SULPHATE OF IRON
Year: 1884

page_text: I SAMUEL CALLARD of Pontamman Chemical Works Ammanford Carmarthen
Chemical Manufacturer, do hereby declare the nature of the said invention for
"IMPROVEMENTS IN THE TREATMENT OF SULPHATE OF IRON " to be as follows:-
This invention relates to improvements in the drying of the Sulphate of Iron
previous to its being placed in the muffle and though it may be otherwise used it
is specially applicable to the process described in the Specification of Letters Patent
granted to Thomas Terrell N° 5930 dated 4th April 1884.
For the purposes of this invention I take the sulphate of Iron and place it in
Iron pans known as torrifiers and introduce a proportion of Sulphuric Acid or of
sulphuric acid and water or a solution of sulphate of iron charged with an excess
of sulphuric acid which entirely prevents the formation of Scale (this being the
great obstacle to the satisfactory working of the above patent) and brings the
whole charge into a thoroughly pulverized condition when dry sulphur may be
added in the pans when required to enable the decomposition of the sulphate of
iron to take place in the subsequent process.
This Invention will also make a very considerable reduction in the cost of
preparing the Sulphate of Iron for the Muffle.
This invention can be employed with other apparatus used in the process of
drying copperas.

page_text: I SAMUEL CALLARD of Pontamman Chemical Works Ammanford Carmarthen
Chemical Manufacturer do hereby declare the nature of my invention for
"IMPROVEMENTS IN THE TREATMENT OF SULPHATE OF IRON" 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 improvements in the drying of the sulphate of iron
previous to its being placed in the muffle and though it may be otherwise used it
is specially applicable to the process described in the Specification of Letters Patent
granted to Thomas Terrell N° 5930 dated 4th April 1884 for "Improvements in the
destructive distillation of sulphate of iron and in the obtaining therefrom of
sulphurous acid and red oxide of iron."
For the purposes of this invention I take the sulphate of iron and place it in
iron pans known as torrifiers and introduce a proportion of sulphuric acid or of
sulphuric acid and water or a solution of sulphate of iron charged with an excess
of sulphuric acid which entirely prevents the formation of scale (this being the
great obstacle to the satisfactory working of the above patent) and brings the
whole charge into a thoroughly pulverized condition when dry. Sulphur may be
added in the pans when required to enable the decomposition of the sulphate of
iron to take place in the subsequent process.
This Invention will also make a very considerable reduction in the cost of
preparing the sulphate of iron for the muffle.
This invention can be employed with other apparatus used in the process of
drying copperas.
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 method substantially as specified of treating or drying sulphate of iron
which consists in adding to the sulphate of iron sulphuric acid sulphuric acid and
water or a solution of iron charged with an excess of sulphuric acid for the purpose
of preventing the formation of scale in the torrifying pans.