An Improved Method of and Apparatus for Brightening Rape, Linseed, and similar Oils.
Year: 1892

page_text: Date of Application, 19th Oct., 1892
Complete Specification Left, 28th Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL SPECIFICATION.
An Improved Method of and Apparatus for Brightening Rape,
Linseed, and similar Oils.
I, ALFRED TEAL, of 3, Bedford Street, Wilmington, near Hull, in the County
of York, Oil Manufacturer's Foreman, do hereby declare the nature of this
invention to be as follows:
This invention relates to the treatment of rape, linseed and similar oils, whether
extracted by means of volatile solvents or by pressure, with the object of clarifying
or "brightening" the product and enhancing its value as a marketable commodity.
In order to remove the dull appearance which oils of the class above referred to
usually present, the liquid is either allowed to remain quiescent sufficiently long to
permit the solid matters to subside, or it is filtered through bags or filter presses.
The former process is dilatory, whilst the latter is rather costly.
According to my improved method of treatment, the dull oil, after standing a
few hours to allow the heavier particles of solid matter to subside, is drawn off to
a tank furnished with a steam coil (or other suitable heating appliance) capable of
raising the contents of the tank, when charged with oil, to a temperature of about
160° Fahr. in about one hour. The oil having been raised to this temperature, the
steam may usually be shut off from the heating coil, and the oil is then allowed to
flow by way of a valve-controlled pipe to a small suction tank, whence a pump
lifts and forces it to a height of about 5 feet above the top of the tank previously
referred to in connection with the heating of the oil. It is there delivered into a
box the bottom of which is perforated with small holes, through which the oil
flows and falls upon a sheet of fine wire gauze. At a short distance below this
sheet, I prefer to arrange another similar sheet of fine wire gauze; the oil being
temporarily intercepted by each of these sheets successively, and, after passing
through then, falling back into the working tank. The circulation of the oil
through the pump and the sheets of wire gauze back to the tank is continued until
a sample of the oil drawn off' remains bright when cold.
My improved method of treatment is not exclusively applicable to rape, linseed
and like oils, but may be applied to other oils which when first expressed or
extracted are dull in appearance, but which require to be rendered bright before
being placed on the market.
I would also have it understood that I do not confine myself to the particular
disposition of apparatus herein before described; the same being merely intended
to exemplify the manner in which such apparatus may be arranged with the object
of effecting the thorough exposure of the oil to the atmosphere, and ensuring the
evaporation of the moisture contained therein.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
An Improved Method of and Apparatus for Brightening Rape,
Linseed, and similar Oils.
I, ALFRED TEAL, of 3, Bedford Street, Wilmington, near Hull, in the County
of York, Oil Manufacturers' Foreman, 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:-
This invention relates to the treatment of rape, linseed and similar oils, whether

page_text: "
extracted by means of volatile solvents or by pressure, with the object of clarifying
or "brightening the product and enhancing its value as a marketable
commodity.
:
In order to remove the dull appearance which oils of the class above referred to
usually present, the liquid is either allowed to remain quiescent sufficiently long
to permit the semi-solid matters or
"foots
to subside, or it is filtered through
bags or filter presses. The former process is dilatory, whilst the latter is
rather costly.
In clarifying or brightening oil according to my improved method, I employ
apparatus of the kind illustrated in the accompanying diagram. The dull oil,
after standing a few hours to allow the heavier particles of "semi-solid matter to
subside, is drawn off to a tank A furnished with a steam coil B (or other suitable
- heating appliance) capable of raising the contents of the tank, when charged with
oil, to a temperature of about 160° Fahr. in about one hour. The oil having been
raised to this temperature, the steam may usually be shut off from the heating coil,
and the oil is then allowed to flow by way of a valve-controlled pipe a to a small
suction tank C, whence a pump D lifts and forces it to a height of about 5 feet
above the top of the tank A. It is there delivered into a box E, the bottom of
which is perforated with small holes, through which the oil flows and falls upon a
sheet of fine wire gauze F. At a short distance below this sheet, I prefer to
arrange another similar sheet of fine wire gauze F; the oil being temporarily
intercepted by each of these sheets successively, and, after passing through them,
falling back into the working tank A. The circulation of the oil through the
pump D and the sheets of wire gauze FF back to the tank. A is continued until
a sample of the oil drawn off remains bright when cold..
My improved method of treatment is not exclusively applicable to rape, linseed
and like oils, but may be applied to other oils which when first expressed or
extracted are dull in appearance, but which require to be rendered bright before
being placed on the market.
I would also have it understood that I do not. confine myself to the particular
disposition of apparatus illustrated in the accompanying diagram; the same being
merely intended to exemplify one manner in which such apparatus may be arranged
with the object of effecting the thorough exposure of the oil to the atmosphere,
and ensuring the evaporation of the moisture contained therein. As the result of
such treatment, the "foots" separate and subside in a fairly solid form, and the oil
can be drawn off "bright." The action may, if desired, be expedited by causing
a current of air to traverse the space through which the fine streams of oil fall.
Instead of exposing the oil to the atmosphere in fine streams, it may be allowed to
flow in thin sheets over extended surfaces.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I claim:-
1. The improved method of brightening rape, linseed and similar oils, by exposing
same to the atmosphere in finely-divided streams or otherwise spread, so as to
present large surfaces for the purpose of promoting the evaporation of the moisture
contained therein, substantially as herein described.
2. The improved apparatus applicable for use in brightening rape, linseed and
similar oils, substantially as herein described, and comprising a tank furnished with
a steam coil or other heating appliance, a box or tray having a perforated bottom,
one or more sheets of gauze arranged at intervals beneath the tray, and means for
lifting the oil from the tank to the tray.
Dated the 17th day of December 1892
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.