AN IMPROVED PREPARATION OF ANTISEPTIC FOR THE PRESERVATION OF MEAT, FISH, AND OTHER ARTICLES OF FOOD
Year: 1880

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of
J. Brandt and G. W. von Nawrocki, Patent Agents, of No. 124, Leipziger
Strasse, Berlin, in the German Empire, for an Invention of "AN IMPROVED
PREPARATION OF ANTISEPTIC FOR THE PRESERVATION OF MEAT, FISH, AND
OTHER ARTICLES OF FOOD." A communication by Otto Leupold, of Stuttgart,
in the German Empire.
COMPLETE SPECIFICATION filed by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 25th
November 1880.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, Patent Agents, of No. 124, Leipziger Strasse, Berlin, in the German
Empire. "AN IMPROVED PREPARATION OF ANTISEPTIC FOR THE PRESERVATION
OF MEAT, FISH, AND OTHER ARTICLES OF FOOD." A communication by Otto
Leupold, of Stuttgart, in the German Empire.
Boracic acid is the most effectual antiseptic for the preservation of meat and
other articles of food, but its application to such purposes in the pure state is
impracticable on account of its more or less insoluble nature.
According to the present Invention a soluble compound of boracic acid is
obtained by the admixture therewith of borax, for which purpose the two substances
are mixed together in water in the proportions of about one atom of borax to from
5 to 10 atoms of boracic acid. By this means a perfect solution and mixture is
obtained with very little water, and which on evaporating gives a solid compound
that is soluble in about ten parts of cold water, and that is applicable with very
good effect in the dry state for preserving meat, fish, milk, butter, and other articles
of food. Instead of borax an equivalent quantity of caustic soda or potash, or of
their carbonates, can be used for rendering the boracic acid soluble.
The best proportions of the above compound have been found to be one atom of
borax to six atoms of boracic acid, therefore 10 parts by weight of borax to 195
parts by weight of boracic acid. These are dissolved in at least from 250 to 300
parts of water, if the compound does not require to be filtered (which depends upon
the purity of the raw materials used), or in from 1000 to 1500 parts of water if it

page_text: has to be filtered. The compound is then evaporated until it has attained the
consistency of syrup, whereupon it is allowed to cool, and is dried and ground to a
powder.
Having thus described the nature of this Invention, and in what manner the
same is to be performed, as communicated to me by my correspondent, I claim,-
First. The preparation of an antiseptic consisting of boracic acid rendered soluble
by admixture of either borax, caustic soda, or potash, or carbonates of soda or
potash, substantially as herein described.
Second. The use of the antiseptic referred to in the preceding claim for the
preservation of meat, fish, butter, milk, and other articles of food.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal, this Twenty second day of November, in
the year of our Lord One thousand eight hundred and eighty.
GERARD WENZESLAUS VON NAWROCKI. (L.S.)