IMPROVEMENTS IN THE TREATMENT OF NATURAL SUBSTANCES CAWATI DRAGELSAT OF NATural Sub- STANCES CONTAINING PHOSPHATES OF ALUMINA
Year: 1875

page_text: LETTERS PATENT to Manning Prentice, the younger, of Stowmarket,
in the County of Suffolk, Chemical Manufacturer, for the Inven-
tion of "IMPROVEMENTS IN THE TREATMENT OF NATURAL SUBSTANCES
CAWATI DRAGELS
Ая
33
Sealed the 2nd November 1875, and dated the 11th May 1875.
PROVISIONAL SPECIFICATION left by the said Manning Prentice at
the Office of the Commissioners of Patents, with his Petition, on
the 11th May 1875.
I, MANNING PRENTICE, the younger, of Stowmarket, in the County
of Suffolk, Chemical Manufacturer, do hereby declare the nature of
my said Invention for "IMPROVEMENTS IN THE TREATMENT OF NATural Sub-
STANCES CONTAINING PHOSPHATES OF ALUMINA," to be as follows:-
This Invention relates to the treatment of natural products containing
phosphoric acid and alumina, and consists in subjecting such natural
phosphates to the action of an alkali or alkaline carbonate, such for
example as caustic soda, or carbonate of soda, or soda ash, or to what is
known as black ash liquor, or to other alkaline products, such for

page_text: example, as the waste alkaline liquors from paper works, in order that
the phosphoric acid and the alumina contained in the natural phosphates
may be separated therefrom by being thus rendered into a condition
capable of being dissolved in water; or instead of employing any of the
before-mentioned alkaline compounds or products I submit the phos-
phate of alumina by preference in a finely divided condition, in con-
junction with sulphate of soda, coal, or other carbonaceous matter to
the action of heat, in order that the phosphoric acid, together with the
alumina, shall be converted into a soluble condition.
In carrying out my Invention I firstly submit the natural phosphates
before referred to to the action of an alkali or alkaline carbonate, such
for example, as caustic soda, or carbonate of soda, or soda ash, or to
sulphate of soda or salt cake in conjunction with coal or other car-
bonaceous matter in a furnace, or to the action of an alkali or alkaline
carbonate, such for example as caustic soda, or carbonate of soda, or
soda ash, or to what is known as black ash liquor, or to any other caustic
alkaline product in a vessel containing a solution of the same, either at
the ordinary or at an elevated temperature.
-
By subjecting the natural phosphates containing alumina to the action
of the before-mentioned alkalies or alkaline solutions, the phosphoric
acid and the alumina contained therein are brought into a condition
capable of being dissolved in water, and I then treat the solution thus
obtained in the following manner: The solution may either be
evaporated to such a density as that the whole or the greater portion
of the phosphate of soda may, upon the cooling of the solution, be
crystallized out and the aluminate of soda remaining in solution may
then be separated therefrom, which solution may be treated either by
means of carbonic acid so as to separate the alumina therefrom, and to
obtain carbonate of soda or be submitted to the action of caustic lime in
order that the alumina may be separated therefrom, and the soda be
liberated, or the solution containing the phosphate of soda and the
alumina may be treated with lime or with a salt of lime, in order that
the phosphoric acid and the alumina may be precipitated therefrom.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Manning Prentice in the Great Seal Patent Office
on the 8th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MANNING
PRENTICE, the younger, of Stowmarket, in the County of Suffolk,
Chemical Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of May, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Manning Prentice, Her special
license, that I, the said Manning Prentice, my executors, adminis-
trators, and assigns, or such others as I, the said Manning Prentice,
my executors, administrators, or assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN THE TREATMENT OF NATURAL SUBSTANCES CONTAINING
PHOSPHATES OF ALUMINA," upon the condition (amongst others) that I,
the said Manning Prentice, my executors or administrators, by an
instrument in writing under my hand and seal, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Manning Prentice, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, that is to say :—
The said Invention relates to the treatment of natural products con-
taining phosphoric acid and alumina, and consists in subjecting such
natural phosphates to the action of an alkali or alkaline carbonate, such for
example as caustic soda, or carbonate of soda, or soda ash, or to what is
known as black ash liquor, or to other alkaline products, such for
example, as the waste alkaline liquors from paper works, in order that

page_text: the phosphoric acid and the alumina contained in the natural phosphates
may be separated therefrom by being thus rendered into a condition
capable of being dissolved in water; or instead of employing any of the
before-mentioned alkaline compounds or products, I submit the phos-
phate of alumina by preference in a finely divided condition, in con-
junction with sulphate of soda, coal, or other carbonaceous matter to
the action of heat, in order that the phosphoric acid, together with the
alumina, shall be converted into a soluble condition.
In carrying out my Invention, I firstly submit the natural phosphates
before referred to to the action of an alkali or alkaline carbonate, such
for example, as caustic soda, or carbonate of soda, or soda ash, or to
sulphate of soda or salt cake in conjunction with coal or other car
bonaceous matter in a furnace, or to the action of an alkali or alkaline
carbonate, such for example as caustic soda, or carbonate of soda, or
soda ash, or to what is known as black ash liquor, or to any other caustic
alkaline product in a vessel containing a solution of the same, either at
the ordinary or at an elevated temperature.
By subjecting the natural phosphates containing alumina to the
action of the before-mentioned alkalies or alkaline solutions, the phos-
phoric acid and the alumina contained therein are brought into a
condition capable of being dissolved in water, and I then treat the
solution thus obtained in the following manner:-The solution may
either be evaporated to such a density as that the whole or the greater
portion of the phosphate of soda may, upon the cooling of the solution,
be crystallized out, and the aluminate of soda remaining in solution may
then be separated therefrom, which solution may be treated either by
means of carbonic acid so as to separate the alumina therefrom, and to
obtain carbonate of soda, or it may be submitted to the action of caustic
lime, in order that the alumina may be separated therefrom and the
soda be liberated, or the solution containing the phosphate of soda and
the alumina may be treated with lime, or with a salt of lime, in order
that the phosphoric acid and the alumina may be precipitated there-
from.
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 hercin-before in part recited Letters Patent is,―

page_text: First. The treatment of natural phosphates containing phosphates of
alumina, so as to obtain soluble compounds of alumina and of phosphoric
acid therefrom, in the manner herein-before mentioned.
Second. The production from natural phosphates of alumina of pure
alumina, or of aluminous compounds capable of being employed in the
manufacture of mordants.
In witness whereof, I, the said Manning Prentice, the younger,
have to this my Specification set my hand and seal, this Sixth
day of November, One thousand eight hundred and seventy-
five.
Witness to the Signature of
Manning Prentice,
GEORGE B. DENNANT,
Stowmarket.
MANNING PRENTICE. (L.S.)