AN IMPROVED METHOD OF TREATING CURRIED OR DRESSED LEATHER CUTTINGS AND WASTE 80 AS TO UBTAIN VALUABLE PRODUCTS.
Year: 1874

page_text: LETTERS PATENT to Martin Murphy, of Liverpool, in the County of
Lancaster, Analytical and Consulting Chemist, for the Invention of
"AN IMPROVED METHOD OF TREATING CURRIED OR DRESSED LEATHER CUTTINGS
AND WASTE 80 AS TO UBTAIN VALUABLE PRODUCTS.
Sealed the 8th June 1875, and dated the 17th December 1874.
PROVISIONAL SPECIFICATION left by the said Martin Murphy at the
Office of the Commissioners of Patents, with his Petition, on the
17th December 1874.
I, MARTIN MURPHY, of Liverpool, in the County of Lancaster,
Analytical and Consulting Chemist, do hereby declare the nature of the
said Invention for "AN IMPROVED METHOD OF TREATING CURRIED OR DRESSED
LEATHER CUTTINGS AND WASTE, SO AS TO OBTAIN VALUABLE PRODUCTS," to be as
follows:-
The objects of my Invention are (1) to extract from curried or dressed
leather cuttings or waste the oily or fatty matters contained therein;
(2) to obtain the leather from which the oily or fatty matters have been
extracted fit for the ordinary uses for which undressed or uncurried

page_text: leather are applied; and (3) to obtain the extracted oily or fatty
matters in a merchantable form. For these purposes I proceed as
follow :-
First. As means for extracting the oily or fatty matters I treat the
said cuttings or waste by placing them in a liquid or gaseous bath of 5
any suitable solvent, such as a hydrocarbon oil or liquid, capable of
dissolving animal or vegetable oils and fats, such treatment being
effected in any suitable vessel.. The temperature and pressure at which
the treatment is conducted will vary according to circumstances. If it
is desired to entirely remove the oily or fatty matters from the leather it 1
will be necessary to treat such leather to more than one bath. After
the oily or fatty matters have been extracted the leather is fit for the
various uses for which undressed or uncurried leather is available.
Second. As means for obtaining in a merchantable form the oily or
fatty matters contained in the product produced by the treatment 1
described under part one I subject such product to distillation and
condensation, thus separating the solvent from the oily or fatty matters.
The solvent is now fit to be again used as described under part one, and
the oils or fats are fit for use as lubricators or for general purposes.
I prefer to conduct the treatment under the first part in a vessel in 2
which there is a grid for the leather cuttings or waste to rest on whilst
being treated. Such vessel is closed to the atmosphere. Inlet and
outlet pipes are provided for the solvent; charging and discharging
doors are also employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Martin Murphy in the Great Seal Patent Office
on the 17th June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MARTIN
MURPHY, of Liverpool, in the County of Lancaster, Analytical and
Consulting Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of December, in the
year of our Lord One thousand eight hundred and seventy-four, in

page_text: the thirty-eighth year of Her reign, did, for Herself, Her heirs and
succesors, give and grant unto me, the said Martin Murphy, Her
special licence, that I, the said Martin Murphy, my executors, admi-
nistrators, and assigns, or such others as I, the said Martin Murphy,
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 vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVED METHOD OF TREATING CURRIED OR DRESSED LEATHER CUTTINGS
AND WASTE SO AS TO OBTAIN VALUABLE PRODUCTS," upon the condition
(amongst others) that I, the said Martin Murphy, my executors
or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, 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 Martin Murphy, 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 :—
The objects of my Invention aro (1) to extract from curried or dressed
leather cuttings or waste the oily or fatty matters contained therein;
(2) to obtain the leather from which the oily or fatty matters have been
extracted fit for the ordinary uses to which undressed or uncurried
leather are applied; and (3) to obtain the extracted oily or fatty
matters in a merchantable form. For these purposes I proceed as
follows:-
First. As means for extracting the oily or fatty matters I treat the
said cuttings or waste by placing them in a liquid or gaseous bath of
any suitable solvent, such as a hydrocarbon oil or liquid, capable of
dissolving animal or vegetable oils and fats, such treatment being
effected in any suitable vessel. The temperature and pressure at which
the treatment is conducted will vary according to circumstances. I prefer
a temperature of about 150 degrees Fahrenheit. If it is desired to
entirely remove the oily or fatty matters from the leather it will be

page_text: necessary to treat such leather to more than one bath. After the oily or
fatty matters have been extracted the leather is fit for the various uses
for which undressed or uncurried leather is available.
Second. As means for obtaining in a merchantable form the oily or
fatty matters contained in the product produced by the treatment
described under part one I subject such product to distillation and
condensation, thus separating the solvent from the oily or fatty matters.
The solvent is now fit to be again used as described under part one, and
the oils or fats are fit for use as lubricators or for general purposes.
I prefer to conduct the treatment under the first part in a vessel in
which there is a grid for the leather cuttings or waste to rest on whilst
being treated. Such vessel is closed to the atmosphere. Inlet and
outlet pipes are provided for the solvent; charging and discharging doors
are also employed.
The distillation and condensation of the product to separate the solvent
from the oily or fatty matters is conducted in ordinary or suitable dis-
tilling and condensing apparatus.
Having now described and particularized my said Invention in such
manner that others will be enabled to carry my improvements into effect,
I claim,―
First. Treating curricd leather cuttings or waste, substantially in the
manner and for the purposes set forth under part one.
Second. The distillation and condensation of the product obtained
under part one, substantially in the manner and for the purposes de-
scribed under part two.
In witness whereof, I, the said Martin Murphy, have hereunto set my
hand and seal, the Sixteenth day of June, in the year of our Lord
One thousand eight hundred and seventy-five.
J. JOHNSON,
Patent Office,
Clayton Square,
Liverpool.
MARTIN MURPHY. (L.S.)