Chemical Alteration of the same.
Year: 1888

page_text: Chemical Alteration of the same.
I, ANDREAS CARL DRENCKHAN of the Town of Stendorf, near Schönwalde, Holstein
in the German Empire, Gentleman, 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. :-
My invention relates to a process for rendering milk and other matters 'consistent
without in any way causing a chemical alteration of the same, that is, the aqueous
parts of the milk are abstracted so as to leave only those parts of the said milk which
are capable of being dried or arefied and formed into firm cakes, which, when dissolved
in water will not only have the appearance, but all the nutritive properties and the
taste of pure natural milk from which the cream has been once removed or one meal
milk and can hardly be distinguished from the same.
Hundreds of persons have before me attempted to reduce the milk of cows and
other animals to a consistent form but have in not one single case succeeded in
carrying the same into effect without resorting to adulteration, it having been
heretofore impossible to condense milk in a pure state. By my treatment of the milk
so as to remove the aqueous parts of the same and render the milk consistent and in
this manner enable the same to be preserved and stored for any length of time and
furthermore perimit the saine to be cheaply transported for any distance and to
clime, I claim to have made an invention of utmost utility to mankind at large.
any
The solidified milk can be employed for many purposes without being previously
dissolved in water such for instance as being added to tea, coffee, and other beverages
or the same can be eaten in its solid form as it is readily dissolved by the saliva and
will undoubtedly prove of incalculable value for hospitals, for use on board ships, in
military hospitals and barracks, in hotels, for travellers and also for general household
purposes.
The said milk, when in a solidified state is a delicious, easily digestible and cheap
food, occupies a minimum of space, is not in the least degree liable to deterioration
and will therefore be found of the greatest possible advantage for use on board ships
of war, emigrant and other ships and for other purposes.--
My dry milk is a readily digestible; very nourishing food for children, and even for
babies it is, although freed from fat, at least equally as nourishing as Swiss Milk.

page_text: In order to carry my process into effect I proceed as follows:
To the milk which has been partially freed from cream I add a small quantity, for
instance 20 to 30 grammes per Litre milk, of starch, syrup or sugar glucose or other
kind of sugar finest gelatine, isinglass or other equivalent material or substance which
is dissolved in the milk and serves to surround the particles to be separated from the
aqueous portion of the milk or in other words will isolate said particles from the
aqueous component parts of the milk and cause the same, after the aqueous portion
has been abstracted to adhere inore firmly to each other.
When my solid milk is dissolved the sugar gelatine or other matter employed in
connection with the same will readily melt or dissolve so that the milk can form a
perfect emulsion with the fluid in which the same is dissolved and when mixed with
water will give milk in all respects equal to good dairy milk.
After the syrup, sugar, glucose or other suitable material has been added to the
milk the saine is introduced into a vacuum apparatus and reduced to about one fifth of
its original volume at a temperature which must in no case exceed 70° Centigrade
after which the thickened milk is placed in a vat, barrel or other vessel provided with
a stirring device. This vessel is placed in a water bath and the water at first kept
heated up to about 50° C. but can subsequently be reduced to 43° C.
An air pump or exhauster is now connected to the vessel containing the milk and
as high a vacuum as possible produced in the same. Rarefied warın air is led into
the bottom of the said vessel and is sucked through the fluid or semifluid mass. This
dry air becomes saturated with the moisture in the milk which is kept in continuous
*motion by the stirring device so that the said milk is rapidly-freed from moisture and
rendered consistent in order that it can be filled into forms and placed in the drying
room or apparatus to be fully dried.
The dried product can be pressed into round, tablet or other form and of desired
size and weight ready for dissolving in a predetermined quantity of water to give good
milk or in cakes for edible purposes.
In order to still better preserve the dry milk and exclude the air from the same the
finished product can be provided with a thin coating of sugar, gelatine or other
desired material by immersing the said cakes or other form of dry milk in a
concentrated solution of sugar, gelatine or the like and after drying can be well
packed in paper or other material.
Having now particularly described and ascertained the nature of my said
invention, I declare that what I claim is:
The process for simultaneously obtaining all the dryable component parts of
cow and other milk in a solid form without any chemical alteration of the same
characterised principally by the addition of syrup, glucose, sugar, gelatine or other
suitable material to the milk from which the cream has been once removed and before
reducing the said milk to about one fifth of its volume, then removing the remaining
moisture from the milk in a vessel surrounded by hot water which said vessel is in
connection with an appropriate vacuum apparatus or exhauster and with a tube or
pipe which feeds warm dry air into the said vessel in which the milk is kept in
continuous motion by means of a suitable stirring device so that the warm air sucked
or drawn through the milk by the force of the vacuum apparatus or exhauster will
become saturated with moisture and thus produce a drying or solidifying of the milk
which can be pressed into forms and, if desired, be provided with a protective coating
of appropriate material substantially as set forth.