IMPROVE- MENTS IN TREATING SUGAR, SYRUPS, AND JUICES FOR DECOLOURIZING AND PURIFYING SAME
Year: 1874

page_text: LETTERS PATENT to William Whitthread, of Liverpool, in the County
of Lancaster, Analytical Chemist, for the Invention of "IMPROVE-
MENTS IN TREATING SUGAR, SYRUPS, AND JUICES FOR DECOLOURIZING AND
PURIFYING SAME.
Sealed the 19th January 1875, and dated the 20th July 1874.
PROVISIONAL SPECIFICATION left by the said William Whitthread at
the Office of the Commissioners of Patents, with his Petition, on
the 20th July 1874..
I, WILLIAM WHITTHREAD, of Liverpool, in the County of Lancaster,
Analytical Chemist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN TREATING SUGAR, SYRUPS, AND JUICES FOR DECOLOURIZING
AND PURIFYING SAME," to be as follows:-
In carrying out my Invention I add to the solutions of sugar, or to
the syrups or juices, milk of lime, and heat the mixture; and I then
add dicalcic phosphate dissolved in an aqueous solution of monocalic

page_text: phosphate or dicalcic phosphate dissolved in water supersaturated with
carbon dioxide, or mixed with an absorbent body, such as any kind of
charcoal (videlecet, animal, peat, wood, seaweed, or shale charcoals, or
others) to deficate the impure syrups or juices, and I remove the
insoluble matters by any of the well-known means. This part of my
Invention I prefer to use where weak solutions exist, as on the planta-
tion or farms.
In the process of refining sugars I prefer to filter the stronger solutions
of sugar, syrups, or juices through animal charcoal, so long as the
charcoal will decolourize the solution of sugar. I then cleanse the 1
charcoal by any of the well-known means, preferring those processes
known as the wet processes; and I revivify this cleansed charcoal by
adding to it either of the phosphatic solutions above described.
Other kinds of charcoal besides animal may be used, and I treat these
with the phosphatic solutions, or either of them, before I attempt to
deficate the solution of sugar, and I cleanse and revivify the same as
before described for animal charcoal or not, as may be desirable.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Whitthread in the Great Seal Patent
Office on the 20th January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
WHITTHREAD, of Liverpool, in the County of Lancaster, Analytical
Chemist, send greeting.
!
2
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of July, in the year of 2
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her. heirs and successors,
give and grant unto me, the said William Whitthread, Her special licence,
that I, the said William Whitthread, my executors, administrators, and
assigns, or such others as I, the said William Whitthread,
my executors,
administrators, and 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

page_text: When animal charcoal is employed such charcoal need not be sub-
jected to the action of a dicalcic solution the first time of use, but for the
second and each following time the same process as for vegetable
charcoal must be observed.
Having now described the nature of the said Invention and par-
ticularized the same in such manner that others will be enabled to
practice the same, I claim,-
First. Treating weak, syrups and juices substantially as described and
set forth under the first head...
Second. Treating.strong syrups and juices substantially as described
and set forth under the second head.
In witness whereof, I, the said William, Whitthread, have hereunto
set my hand and seal, this Nineteenth day of January, in the
year of our Lord One thousand eight hundred and seventy-
five.
E
1
In the presence of
JAMES JOHNSON,
Patent Office,
4, Clayton Square,
Liverpool.
W. WHITTHREAD. (L.S.)