Improvements in the Preparation of Perfumes.
Year: 1899

page_text: 1:
Date of Application, 21st June, 1899
· Complete Specification Left, 17th Mar., 1900—Accepted, 21st Apr., 1900
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7.J
Improvements in the Preparation of Perfumes.
We, EUGEN MIRAU, of 18, Werftstrasse, Engineer, and Dr. PHIL. FRITZ
SCHWARZ, of 17, Gerhardstrasse, Chemist, both in Berlin, in the German Empire,
do hereby declare the nature of this invention to be as follows:--
This invention relates to improvements in the preparation of pure flower
perfumes.
According to the invention the essential oil which is given off from the flowers
to the surrounding air during the whole of the blossoming period is drawn, with
the air so perfumed, through a fan or the like and is then extracted by known
absorption and solution processes.
Experience has shewn that each blossom gives out the finest perfume when it
is still unplucked and is in direct communication with the soil. In most plants
which richly develop blossoms it has been found that the aroma of the blossoms,
very soon changes after the said blossoms are plucked which is a natural result
of the interrupted life functions. It is therefore, clear that by the employment
of such dead blossoms an essential oil can never be obtained which corresponds
absolutely to reality, that is to say, to that developed during the growing period
but that this oil has already, for a certain length of time, taken part in the
decaying process of the blossoms and is consequently chemically altered. The
natural result of this is that perfectly pure essential oil can only be obtained by
drawing off the vapourized oil developed from the blossoms.
The process can be advantageously carried into practice by grouping suction
troughs or the like around the edges of the spaces containing the blooms, which
troughs are in communication with a fan or the like by a suitable suction passage.
This fan or ventilator is arranged in the centre of the space containing the flowers
and distributes the air, which has been sucked from the edges of the space and
has been deprived of any scent it may possess by suitable devices in the suction
pipes (for example vessels containing Provence oil and the like) in such a manner
in all directions over the blossoms that even the perfume developed in the centre
of the space is drawn towards the edges into the suction troughs. In the case
of tall plants the process is similarly carried out.
1
T
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Preparation of Perfumes.
We, EUGEN MIRAU, of 18, Werftstrasse, Engineer, and Dr. PHIL. FRITZ
SCHWARZ, of 17, Gerhardstrasse, Chemist, both in Berlin, in the German Empire,
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 follow-
ing statement:-
--
This invention relates to improvements in the preparation of pure flower

page_text: Experience has shewn that all blossoms exhale the finest perfume whilst they
are still unplucked and are in direct communication with the soil. In most
plants which richly develop blossoms the aroma of the blossoms very soon changes
after they are plucked, this being the natural result of the interrupted life
functions. It is, therefore, clear that an essential oil can never be obtained from
dead blossoms which corresponds absolutely to reality, that is to say, to that
developed during the growing period, but that this oil has already chemically
altered as it has for some time taken part in the decaying process of the blossoms.
Now, this invention has for its object a process by means of which the essential
oil can be obtained from blossoms in the natural condition.
The process is based upon the principle of utilising the blossoms whilst they
are still attached to the plant rooted in the soil, that is to say, whilst still un-
plucked and it consists in removing or collecting the essential oil developed by
the living blossoms during the whole of the blossoming period, that is to say,
from the budding to the withering period, after the said oil has passed into the
air surrounding the plants, the said oil being collected from the surrounding air
by an absorbing or dissolving medium..
The process can be carried out in various ways either from unenclosed areas
or in green-houses. We will now describe, by way of example, three methods of
carrying out the invention.
1. The fat or oil which is designed to absorb the perfume is arranged as near
as possible over the living blossoms and the said perfume is allowed to come
into contact with the fat by natural circulation effected by differences of tem-
perature or differences in specific gravity of the essential oils and of the air.
2. Suction troughs are disposed around the edges of the areas containing the
blooms and a fan or the like is arranged in the centre of the said area, the said
fan being in connection by pipes or the like with each suction trough. The fan
must be so arranged that it distributes the air, which has been sucked.from the
troughs at the edges of the blossoming area and which has been deprived of any
scent it may possess by suitable devices in the suction pipe (for example vessels
containing Provence oil and the like) in all directions over the blossoming area
in such a manner that even the perfume developed in the centre of the said area
is driven towards the edges of the area into the suction troughs.
3. The essential oils which are fielded up by the living blossoms to the air
surrounding them are transmitted directly to a dissolving medium such as alcohol,
petroleum, ether and the like either by forcing the air laden with the perfume
through the dissolving medium or by bringing the said air into intimate contact
with the dissolving medium which is pulverized or finely divided either by spray-
ing nozzles or like devices. If necessary, the perfumed air can be freed from
water vapour before it is brought into contact with the dissolving medium.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is:-
A process for obtaining essential oils in a natural condition, such process con-
sisting in collecting the essential oils developed by living or unplucked blossoms
from the air surrounding the said blossoms and to which the said oils have been
imparted, by an absorbing or dissolving medium, substantially as described.
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.