IMPROVE- MENTS IN THE METHOD OF REFINING AND DECOLORIZING OILS, SPIRITS, AND SYRUPS
Year: 1878

page_text: LETTERS PATENT to Frederick Ludwig Hahn Danchell, of Oseney Crescent,
Camden Town, in the County of Middlesex, for the Invention of "IMPROVE-
MENTS IN THE METHOD OF REFINING AND DECOLORIZING OILS, SPIRITS, AND
SYRUPS"
Sealed the 29th March 1878, and dated the 29th January 1878.
PROVISIONAL SPECIFICATION left by the said Frederick Ludwig Hahn
Danchell at the Office of the Commissioners of Patents on the 29th January
1878.
FREDERICK LUDWIG HAHN DANCHELL, of Oseney Crescent, Camden Town, in
the County of Middlesex. "IMPROVEMENTS IN THE METHOD OF REFINING AND
DECOLORIZING OILS, SPIRITS, AND SYRUPS."
.
The method generally adopted in refining seed oils is to treat the same with
certain acids and alkalies, which have the effect of destroying or removing. to a
certain extent the coloring matter and mucilage contained in the oil.
The coloring matter and other impurities are generally removed from syrups by
means of animal charcoal in a granulated state, through which the syrups are caused
to filter by gravitation.
Spirits are generally refined or rectified by successive distillations.
Instead of employing. acids and alkalies in the case of oils, and granulated animal
charcoal in the case of syrups, I employ, for refining and purifying oils and syrups a
substance known by the name of ivory black or animal charcoal, in a minutely
powdered condition, which I mix with the oil or syrup respectively in a proportion
of about 1 to 4 by weight, or in other proportion, according to the condition of the
oil or syrup, which is ascertained by a previous examination.
Instead of refining or rectifying spirits by successive distillations as heretofore I
mix therewith finely powdered wood charcoal in varying proportions according to
the impurities contained:
1.

page_text: In order to separate the oil or syrup respectively from the ivory black or finely
powdered animal charcoal and the spirits from the wood charcoal, I force the mixture
into any convenient form of filter press.
The oil, syrup, or spirit issuing from the filter press is decolorized and purified or
refined by the intimate contact of the minute particles of the ivory black or
powdered animal charcoal, or of the wood charcoal with the particles of the oil,
syrup, or spirit.
The ivory black or powdered animal charcoal and the vegetable charcoal remain
behind in the form of a solid cake which may be restored to its original condition
by exposing it to a cherry red heat in a close oven or retort, where the impurities
absorbed from the oil, syrup, or spirit are destroyed or driven off.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederick Ludwig Hahn Danchell in the Great Seal Patent Office on
the 29th July 1878.
FREDERICK LUDWIG HAHN DANCHELL, of Oseney Crescent, Camden Town, in
the County of Middlesex. "IMPROVEMENTS IN THE METHOD OF REFINING AND
DECOLORIZING OILS, SPIRITS, AND SYRUPS."
The method generally adopted in refining seed oils is to treat the same with
certain acids and alkalies, which have the effect of destroying or removing to a
certain extent the coloring matter and mucilage contained in the oil.
The coloring matter and other impurities are generally removed from syrups by
means of animal charcoal in a granulated state, through which the 'syrups are caused
to filter by gravitation.
Spirits are generally refined or rectified by successive distillations.
Instead of employing acids and alkalies in the case of oils, and granulated animal
charcoal in the case of syrups, I employ for refining and purifying oils and syrups
a substance known by the name of ivory black or animal charcoal, in a minutely
powdered condition, which I mix with the oil or syrup respectively in a proportion
of about 1 to 4 by weight, or in other proportion, according to the condition of the
oil or syrup, which is ascertained by a previous examination.
Instead of refining or rectifying spirits by successive distillations as heretofore, I
mix therewith finely powdered wood charcoal in varying proportions, according to
the impurities contained.
In order to separate the oil or syrup respectively from the impurities, and from
the ivory black or finely powdered animal charcoal, and the spirits from the impuri-
ties and from the wood charcoal, I force the mixture into and through any convenient
form of filter press, but preferably employing a filter press of the character described
in the Specification of Letters Patent granted to me, dated" January 29, 1878,
No. 376.

page_text: The oil, syrup, or spirit issuing from the filter press is decolorized and purified or
refined by the intimate contact of the minute particles of the ivory black or pow-
dered animal charcoal, or of the wood charcoal with the particles of the oil, syrup,
or spirit.
The ivory black or powdered animal charcoal and the vegetable charcoal remain
behind in the form of a solid cake, which may be restored to its original condition
by exposing it to a cherry red heat in a close oven or retort where the impurities
absorbed from the oil, syrup, or spirit are destroyed or driven off therefrom.
Having thus described the nature of my said Invention and the mode in which
I carry the same into effect, I would have it understood that what I claim is, the
refining and decolorizing oils, spirits, and syrups by mixing therewith the herein-
before mentioned materials and passing the same through a filter press, substantially
as herein described.
In witness whereof, I, the said Frederick Ludwig Hahn Danchell, have
hereunto set my hand and seal, this Twenty-sixth day of July, in the year
of our Lord One thousand eight hundred and seventy-eight.
F. HAHN DANCHELL. (L.S.)