IMPROVEMENTS IN EXTRACTING GREASE FROM SOAP WATER AND ITS SUBSEQUENT BLEACHING AND PURIFICATION
Year: 1884

page_text: I BENJAMIN DAVY of 25, Albany Street, Knowle Park Keighley in the West
Riding of the County of Yorkshire, Grease Extractor, do hereby declare the nature
of my invention for IMPROVEMENTS IN EXTRACTING GREASE FROM SOAP WATER
AND ITS SUBSEQUENT BLEACHING AND PURIFICATION to be as follows:-
I treat the Soap Water in Calico Printing Works with either Sulphuric Acid or
Hydrochloric with the aid of heat hot pressing and filtration. I propose first to
run a certain quantity of the Soap Water sufficient to cover the bottom of the
tanks into the tanks heated from 50 F. upwards and then to add a given quantity
of either Sulphuric or Hydrochloric Acid what I consider sufficient to solidify the
fat contained in the Soap Water I then propose to fill up the tanks with Soap
Water The Acid continually solidifying the fat and the fat consequently rising to
the surface. When the tanks become full I propose to decant the clear liquid and
run it through a filter to obtain any fat that may get from the tanks with it
when I consider the clear liquid to have drained from the tanks I propose to turn
the fat on to another filter, to run off the remaining Water and then to collect the
fat which is ready for hot pressing. For Bleaching and purification I. treat the
grease after coming from the hot presses with a given quantity of Sulphuric or
Hydrochloric Acid and Common Soda, so that after boiling the grease is clarified
and bleached the grease rising to the top and all sediment and water drawn off
from the bottom leaving the clear grease ready for use.

page_text: COMPLETE SPECIFICATION.
I BENJAMIN DAVY of 25 Albany Street Knowle Park Keighley in the West
Riding of the County of Yorkshire Grease Extractor do hereby declare the nature
of my invention for IMPROVEMENTS IN EXTRACTING GREASE FROM SOAP WATER
AND ITS SUBSEQUENT BLEACHING AND PURIFICATION and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :—
I treat the Soap Water in Calico printing works with either Sulphuric Acid or
Hydrocloric Acid with the aid of heat hot presses & filtration I propose first to
run off a certain quantity of the Soap Water sufficient to cover the bottom of the
tanks with the tanks heated from 50° F upwards and then to add a given
quantity of either Sulphuric Acid or Hydrocloric Acid what I consider sufficient to
Bolidify the fat contained in the Soap water the acid continually solidifying the fat
and the fat consequently rising to the surface, When the tanks become full
I propose to decant the clear liquid and run it through a filter to obtain any fat
that may get from the tanks with it When I consider the clear liquid to have
drained from the tanks I propose to turn the fat on to another filter to run off the
remaining water and then to collect the fat which is ready for hot pressing for
bleaching and purification I treat the Grease after coming from the hot presses
with a given quantity of Sulphuric or Hydrochloric Acid and common Soda so that
after boiling, the Grease is clarified and bleached, the Grease rises to the top and all
sediment and Water drawn off from the bottom leaving the Grease ready for use.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1st That the process is as described by me entirely New and is my own
Invention.
L
One thousand night hundred and