IMPROVEMENTS IN THE TREATMENT OF MINERAL PHOSPHATES SO AS TO OBTAIN PRODUCTS THEREFROM "
Year: 1883

page_text: LETTERS PATENT to William George Strype of Wicklow Ireland for an
Invention of "IMPROVEMENTS IN THE TREATMENT OF MINERAL PHOSPHATES
SO AS TO OBTAIN PRODUCTS THEREFROM
"
PROVISIONAL SPECIFICATION left by the said William George Strype at
the Office of the Cominissioners of Patents on the 9th February 1883.
WILLIAM GEORGE STRYPE of Wicklow Ireland "IMPROVEMENTS IN THE
TREATMENT OF MINERAL PHOSPHATES SO AS TO OBTAIN PRODUCTS THEREFROM
נו
This Invention relates to the treatment of mineral Phosphates such as Phosphates
of Iron and Alumina so as to obtain useful products therefrom and it consists in
the employment of an excess of dilute Sulphuric Acid at about 100° Twaddle to
react upon the mineral Phosphate whereby for instance the Alumina is converted
into Sulphate of Alumina and the Iron into Sulphate of Iron and the Phosphoric
Acid is liberated remaining in solution together with the remainder of the excess
of Sulphuric Acid
In carrying out this Invention the mineral Phosphate in a state of division is
submitted to the action of an excess of dilute Sulphuric Acid of a strength of about
100° Twaddle and the decomposition may be assisted by the employment of heat.
The decomposition is effected in evaporating pans and when concentration has
been carried to the desired degree the solution is allowed to cool in order that the
Sulphates may Crystallize out and the solution of Sulphuric Acid containing the
Phosphoric Acid be separated therefrom either by decantation or otherwise This
solution may if necessary be further concentrated or otherwise treated as is well
known in chemical Manufacture or at once employed for purposes useful in
the arta,

page_text: =
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William George Strype in the Great Seal Patent Office on the
30th July 1883.
WILLIAM GEORGE STRYPE of Wicklow Ireland "IMPROVEMENTS IN THE
TREATMENT OF MINERAL PHOSPHATES SO AS TO OBTAIN PRODUCTS THEREFROM
This Invention relates to the treatment of mineral Phosphates such as Phosphates
of Iron and Alumina so as to obtain useful products therefrom and it consists in
the employment of an excess of dilute sulphuric acid at about 100° Twaddle to
react upon the mineral Phosphate whereby for instance (where Phosphate of
Alumina is treated) the Alumina is converted into Sulphate of Alumina or (where
Phosphate of Iron is treated) the Iron is converted into Sulphate of Iron and the
Phosphoric Acid is liberated together with the remainder of the excess of Sulphuric
acid.
In carrying my Invention into effect the mineral Phosphate in a state of division
is submitted to the action of an excess of dilute Sulphuric acid of a strength of
about 100° Twaddle I add about three tons of the dilute Sulphuric acid to every
ton of the mineral Phosphate (of the quantity of Redondo Phosphate) this may be
varied within considerable limits. The decomposition may be assisted by the
employment of heat which may be effected by placing the mineral Phosphate in a
cast iron vessel and then passing the dilute Sulphuric acid into the said vessel. The
heat may be given by a furnace underneath the said vessel and when the con-
centration has been carried to the desired degree the solution is run into cooling
pans where the Sulphates crystalize and the solution of Sulphuric Acid containing
the Phosphoric acid can be separated therefrom either by decantation or otherwise
for example by a filter press but decantation is preferable. The decomposition of
the mineral Phosphate by dilute acid has the effect of allowing the crystals to
settle in the cooling pans. The solution may if necessary be further concentrated
or otherwise treated as is well known in chemical manufacture or at once employed
for purposes useful in the arts.-The other products may also be used in any well
known process.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is :—
The herein before described treatment of mineral Phosphates with an excess of
dilute Sulphuric acid substantially as and for the purpose hereinbefore described.
In witness whereof I the said William George Strype have to this my
Specification set my hand and seal this twelfth day of June One thousand eight
hundred and eighty three.
117 a STRVPE 101