Improved Method of Recovering Oils or Fatty Substances from Clays, Sands, Ores, Mine-slimes or other Finely Divided Substances.
Year: 1894

page_text: PROVIDIUNAL DICITIATION.
Improved Method of Recovering Oils or Fatty Substances from
Clays, Sands, Ores, Mine-slimes, or other Finely Divided
Substances.
I, SAMUEL CROWDER, of 03, New Broad Street, in the City of Loudon, do
hereby declare the nature of this invention to be as follows:-
This invention has reference to the recovery of oils and fatty substances
including hydrocarbon oils and turpentine, hereinafter in this Specification called
oils, from clays, sands, ores, mine-slimes or other finely-divided substances, after
the extraction therefrom of minerals by any process where oils or fats are used
for the purpose of extraction, and also for the recovery of the oils remaining in
the concentrates from any such process and for similar or other purposes, and it
consists in agitating or mixing with water the finely divided clays, sands, ores,
miue-slimes, or other substances containing oils, and collecting the oils.
For this purpose, the mixture of finely divided substances and water may be
introduced into a suitable tank or vessel in such a manner as to produce an upward
current, the globules or particles of oil as they rise to the surface being skimmed
off or drawn off by revolving brushes or paddles, or by any other known means.
I have found that a current of air introduced with the current of water facilitates
the separation of the oil.
1
1
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1004
Improved Method of Recovering Oils or Fatty Substances from
Clays, Sands, Ores, Mine-slimes, or other Finely Divided
Substances.
I, SAMUEL CROWDER, formerly of 63, New Broad Street, but now of Tower
Chambers. Finsbury Pavement, in the City of London, Gentleman, do hereby
declare the nature of this invention and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
Statement:--
This invention has reference to the recovery of oils and fatty substances
including hydro-carbon oils and turpentine, (hereinafter referred to as oils), from
elays, sands, ores, mine-slimes, or other finely divided substances after the extrac-
tion therefrom of minerals by any process in which oils or fats are used for the
purpose of extraction, and also for the recovery of the oils remaining in the
Foncentrates from any such process, and for similar or other purposes..
For this purpose the finely divided clays, sands, ores, mine-slimes, or other
substances containing oils, are mixed and agitated with water, and the mixture

page_text: introduced into a tank, the globules or particles of oil as they rise to the surface
being skimmed off or drawn off by revolving brushes or paddles, or by any other
known or suitable means, and a current of air being introduced into the mixture
to facilitate the separation of the oil therefrom.
The accompanying drawing shows in vertical section, apparatus suitable for
carrying out my invention. It comprises a tank 1 of V-shape in cross-section,
into which the finely divided substances containing oil after being mixed with an
excess of water, are run until the tank is full, air under pressure being admitted
to the bottom of the tank by a pipe 2 and distributing rose 3. The pressure of
the air need only be sufficient to overcome that due to the head of water in the
tank. The air may be blown in simultaneously with the introduction of the
mixture of oily substances and water, or, as I prefer, only after the tank has been
charged with the said mixture, the blowing with air, in either case, being con-
tinued until practically the whole of the oil present has risen to the surface of
the water in the tank. In this way the oils present in the finely divided
substances can be readily quickly and effectually displaced from these substances
and caused to rise to the top of the water in the tank from which they can be
removed in any convenient means such as those herein before referred to. I prefer
however to draw off the freed oils continuously, for which purpose there may be
continuously admitted to the tank 1 by a pipe 4, a small stream of water about
equal in volume to that of the oils rising to the top of the tank, whereby the
oils can be caused to flow over the upper edges of the tank into a receptacle, for
example a trough 5 surrounding the upper part of the tank, whence they can be
led to a storage vessel or tank for further treatment and re-use. A mechanical
stirrer may if desired be arranged at the bottom of the tank 1 for keeping the
finely divided substances in suspension in the water. Usually however, the
current of air admitted by the pipe 2 will suffice for this purpose. My invention
is specially applicable to the recovery of the oils remaining in admixture with
finely divided substances that have been subjected to the treatment described in
the Specification of Letters Patent No. 427 of 1894 granted to George Robson
and myself.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is: -
The herein described method of recovering oils or fatty substances from clays,
sands, ores, slimes, or other finely divided substances containing the same, by
mixing said substances with water and blowing air through the mixture, as set
forth.
ated this way of August,
W. Lloyd Wise,
S. CROWDER.
46, Lincoln's lun Fields, London, W.C., Agent for the Applicant.