Improvements relating to the Purification of Fatty Substances, and to Apparatus therefor.
Year: 1888

page_text: Date of Application, 24th Dec., 1888
Complete Specification Left, 24th Oct., 1889-Accepted 23rd Nov., 1889
FROVISIONAL SPECIFICATION.
[Communicated from abroad by LA SOCIÉTÉ ANONYME DES PARFUMS NATUrels de
CANNES, of Paris, in the Republic of France.]
Improvements relating to the Purification of Fatty Substances, and
to Apparatus therefor.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention relates to the purification of fatty substances extracted by volatile
solvents.
The method of extracting fatty substances by means of volatile solvents is based, as
is well known, upon the property possessed by the latter of boiling at a much lower
temperature than the former. In the case of a volatile solvent charged with a fatty -
substance which has been extracted by its means from any raw material, it is sufficient
in principle, for the purpose of entirely separating it from the said substance, to heat
the solution to a temperature which is suitable for causing the solvent to boil, so
that, as the latter will be volatilized, the fatty substance will alone remain in the
receptacle. It has however been found that whatever may be the duration of the
boiling, it is not possible under these conditions to completely separate the two
substances, as the fatty substance retains a sufficient quantity of the solvent to form
an obstacle to its industrial use.
It is therefore desirable to provide means for a more complete purification. In
order to attain this object, some have utilized steam which is caused to penetrate in
the form of jets through the solution of the fatty substance, whilst others have tried
the distillation in a vacuum. The results obtained in the one as in the other case
have not been altogether satisfactory, and the oil thus prepared retains a sufficiently
large quantity of the solvent to depreciate its quality and limit its use.
By combining these two modes of operation, that is to say, by causing steam in
the form of jets to pass through the fatty solution, and distilling at the same time
in a vacuum, the purification is more complete, and the oil obtained is of a superior
quality.
In order to carry this invention into practice, various kinds of apparatus can be
employed. By way of example I will describe one form of apparatus which 1 use
for the purposes of this invention.
This apparatus comprises a boiler in which the distillation is effected. This
boiler is provided with a double bottom in which steam, which may be obtained
from any generator, is caused to circulate. A perforated coil extends into the lower
part of the boiler in order to introduce into the same steam in the form of jets
and cause agitation. From the upper part of the boiler passes a pipe to a pump
for producing the vacnum through the medium of a refrigerating coil.
Dated this 24th day of December 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Purification of Fatty Substances, and
to Apparatus therefor.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex, 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 purification of fatty substances extracted by volatile
solvents.
The method of extracting fatty substances by means of volatile solvents is based, as
is well known, upon the property possessed by the latter, of boiling at a much lower
temperature than the former. In the case of a volatile solvent charged with a fatty
substance which has been extracted by its means from any raw material, it is sufficient
in principle, for the purpose of entirely separating it from the said substance, to heat
the solution to a temperature which is suitable for causing the solvent to boil, so that,
as the latter will be volatilized, the fatty substance will alone remain in the receptacle.
It has however been found that whatever may be the duration of the boiling, it is not
possible under these conditions to completely separate the two substances as the fatty
substance retains a sufficient quantity of the solvent to form an obstacle to its
industrial use.
It is therefore desirable to provide means for a more complete purification. In
order to attain this object, some have utilized steam which is caused to penetrate in
the form of jets through the solution of the fatty substance, whilst others have tried
the distillation in a vacuum. The results obtained in the one as in the other case
have not been altogether satisfactory and the oil thus prepared retains a sufficiently
large quantity of the solvent to depreciate its quality and limit its use.
By combining these two modes of operation that is to say, by causing steam in the
form of jets to pass through the fatty solution, and distilling at the same time in a
vacuum, the purification is more complete, and the oil obtained is of a superior
quality.
In order to carry this invention into practice, various kinds of apparatus can be
employed.
By way of example I will describe one form of apparatus which is represented in
the accompanying drawing.
This apparatus comprises boiler A in which the distillation is effected. This
boiler is provided with a double bottom B in which steam, which may be obtained
from any generator, is caused to circulate. A perforated coil D extends into the
lower part of the boiler in order to introduce into the same, steam in the form of jets
and cause agitation. A pipe E extends from the upper part of the boiler and sets the
latter in communication with a pump G for producing the vacuum through the
medium of a refrigerating coil F.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondents I declare that what I claim is :-
In the purification of fatty substances extracted by volatile solvents the simul-
taneous employment of steam penetrating in the form of jets to the midst of the fatty
solution and of the distillation in a vacuum.
Dated this 24th day of October 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.