Improvements in the Manufacture of Animal Charcoal.
Year: 1894

page_text: Date of Application, 24th Apr., 1894
Complete Specification Left, 8th Aug., 1894-Accepted, 8th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Animal Charcoal.
I, CHARLES William Kriens, of 30, Listra Park, Stoke Newington, in the
County of London, Chemist, do hereby declare the nature of this invention to be
as follows:
.
My invention relates to the manufacture of animal charcoal from waste leather
or scrap, or the trimmings or curriers' cuttings of hides or skins.
In order to obtain a pure charcoal from such materials I have found it necessary
to remove certain of the foreign substances contained thereby such as the colouring
matter (which I find is soluble in water) and salt prior to carbonization.
In order to remove these foreign substances I steep the materials to be carbonized
in water, preferably at a temperature of say from 100° to 110° Fah., and for a period
of say 48 hours. After this the materials are removed and pressed to expel all the
liquid and the impurities in suspension therein. The steeping process is then
repeated for say another 48 hours after which they are again pressed to remove the
last traces of impurities.
The materials are now introduced tightly into an iron cylinder having only a small
outlet for the escape of the gas generated during the process of carbonization this
cylinder being introduced into a heated retort.
After the carbonization is completed the cylinder is cooled or allowed to cool
before exposing the contents to the atmosphere, thereby preventing such contents
from igniting as would be the case if they were exposed to the atmosphere in a
heated condition.
The gases escaping during the process of carbonization may be collected,
condensed and subsequently treated to obtain the bye products in the usual way.
Dated the 24th day of April 1894
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Animal Charcoal.
I, CHARLES WILLIAM KRIENS, of 30, Listra Park, Stoke Newington, in the
County of London, Chemist, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention relates to the manufacture of animal charcoal from waste leather or
scrap, or the trimmings or curriers cuttings of hides or skins.
In order to obtain a pure charcoal from such materials I have found it necessary
to remove certain of the foreign substances contained thereby such as the colouring
matter (which I find is soluble in water) and salt prior to carbonization.
In order to remove these foreign substances I steep the materials to be carbonized
in water, preferably at a temperature of, say, from 100° to 110° Fahrenheit, and for
a period of, say, 48 hours. After this the materials are removed and pressed to
expel all the liquid and the impurities in suspension therein. The steeping process
is then repeated for, say, another 48 hours after which they are again pressed to remove
the last traces of impurities, and dried.

page_text: The materials are now introduced tightly into an iron cylinder having only a small
outlet (preferably in the cover) for the escape of the gas generated during the
process of carbonization, this cylinder being introduced into a heated retort.
After the carbonization is completed the cylinder is cooled or allowed to cool
before exposing the contents to the atmosphere, thereby preventing such contents
from igniting as would be the case if they were exposed to the atmosphere in a
heated condition.
The gases escaping during the process of carbonization may be collected, condensed
and subsequently treated to obtain the bye products in the usual way.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The manufacture of animal charcoal from waste or scrap leather, or the
trimmings or curriers' cuttings of hides or skins, the process consisting in first
removing foreign substances by steeping and pressing the materials and then after
drying introducing them into a metal cylinder which is itself introduced into a
carbonizing retort, the said cylinder when the carbonization is complete being
allowed to cool before the contents are exposed to the atmosphere, substantially as
described.
2. In the manufacture of animal charcoal from leather cuttings or the like,
effecting the carbonization of such materials in a metal cylinder or vessel (having
only a small outlet for the escape of the gases generated) adapted to be introduced
into a heated retort, substantially as described.
Dated this 8th day of August 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.