IMPROVEMENTS IN TREATING FATTY AND OILY MATTERS OBTAINED FROM WASH WATERS
Year: 1859

page_text: LETTERS PATENT to William Teall, of Wakefield, in the County of
York, Grease Manufacturer, for the Invention of "IMPROVEMENTS IN
TREATING FATTY AND OILY MATTERS OBTAINED FROM WASH WATERS."-A com-
munication from abroad by Mons'. Kirsch, of Aix-la-Chapelle, in the
Kingdom of Prussia.
Sealed the 5th June 1860, and dated the 12th December 1859.
PROVISIONAL SPECIFICATION left by the said William Teal at the
Office of the Commissioners of Patents, with his Petition, on the 12th
December 1859.
I, WILLIAM TEALL, of Wakefield, in the County of York, Grease Manu-
facturer, do hereby declare the nature of the Invention for "IMPROVEMENTS
IN TREATING FATTY AND OILY MATTERS OBTAINED FROM WASH WATERS," to be
as follows:-
This Invention has for its object improvements in treating fatty and oily
matters obtained from wash waters. Fatty and oily matters are now recovered
from wash waters by various processes, which yield them in an impure state.
In order to purify them they are in some cases distilled, by which means the
fatty and oily matters are obtained in a state of considerable purity, but in
the process of distillation they contract a disagreeable odour, which greatly
reduces their commercial value. Now, in order to remove this odour the
distilled fatty and oily matters are treated in the following manner :- _They
are boiled for some time in sulphuric acid, the temperature being maintained
by blowing in steam; bichromate of potash is then added, and the boiling
continued; and, lastly, a quantity of saltpetre is introduced; after some time

page_text: the steam is turned off, and the grease, which will now be free from dis-
agreeable smell, is, when clear, run into another vessel. In this vessel it is
boiled with glycerine, obtained by the saponification of tallow or palm oil,
which communicates to the fatty and oily matters the smell of one or other of
these substances, according to the source from which the glycerine may be
obtained. The fatty and oily matters are lastly washed with water, and the
process is complete. In place of bichromate of potash other salts containing
chromic acid may be employed, but not so advantageously.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Teal in the Great Scal Patent Office on the
12th June 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
TEALL, of Wakefield, in the County of York, Grease Manufacturer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of December, in the year of our
Lord One thousand eight hundred and fifty-nine, in the twenty-third year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said William Teall, Her special licence that I, the said
William Teal, my executors, administrators, and assigns, or such others
as I, the said William Teall, 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 "IMPROVEMENTS IN TREATING FATTY AND OILY MATTERS OBTAINED FROM WASH
WATERS," a communication from abroad by Mons". Kirsch, of Aix-la-Chapelle,
in the Kingdom of Prussia, upon the condition (amongst others) that I, the
said William Teall, 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 William Teall, do hereby declare
the nature of the said Invention, and in what manner the same is to

page_text: be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
This Invention has for its object improvements in treating fatty and oily
matters obtained from wash waters. Fatty and oily matters are now recovered
from wash waters by various processes, which yield them in an impure state.
In order to purify them they are in some cases distilled, by which means the
fatty and oily matters are obtained in a state of considerable purity, but in the
process of distillation they contract a disagreeable odour, which greatly reduces
their commersial value. Now, in order to remove this odour the distilled fatty
and oily matters are treated in the following manner:-They are boiled for
some time with sulphuric acid, the temperature being maintained by blowing
in steam; bichromate of potash is then added, and the boiling continued; and,
lastly, a quantity of saltpetre is introduced; after some time the steam is
turned off, and the grease, which will now be free from disagreeable smell, is,
when clear, run into another vessel. In this vessel it is boiled with glycerine
obtained by the saponification of tallow or palm oil, which communicates to
the fatty and oily matters the smell of one or other of these substances,
according to the source from which the glycerine may be obtained. The fatty
and oily matters are lastly washed with water, and the process is complete. In
place of bichromate of potash, other salts containing chromic acid may be
employed, but not so advantageously.
In carrying out the Invention, the distilled fatty or oily matters are caused
to boil by means of free steam; about two per cent. of concentrated sulphuric
acid is added, and the boiling continued for about half an hour, when at the
rate of about six pounds of bichromate of potash to each ton of fatty or oily
matter is to be added, and the boiling continued for about two hours; a small
quantity of saltpetre may be introduced or it may be omitted; the steam is
then shut off. After settling for a time the clear fatty or oily matters are run
into another vessel, where they are washed with clean water, aided by free
steam. The clear oily or fatty matters are then ready for use, or they may be
boiled up with from three to six pounds of glycerine to each ton.
In witness whereof, I, the said William Teall, have hereunto set my
hand and seal, this Eleventh day of June, in the year of our
Lord One thousand eight hundred and sixty.
WILLIAM TEALL. (L.S.)