IMPROVEMENTS IN THE TREATMENT OF THE RESIDUES OF WINE FOR MANUFACTURING TARTARIC ACID AND TARTARIC SALTS
Year: 1877

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company, Patent
Solicitors, at Frankfort-on-the-Main, in the Empire of Germany, for the In-
vention of "IMPROVEMENTS IN THE TREATMENT OF THE RESIDUES OF WINE
FOR MANUFACTURING TARTARIC ACID AND TARTARIC SALTS." A communi-
cation from Franz Dietrich, Chemist, of Murten (Switzerland), and Guido
Schnitzer, of Schwäbisch Hall (Germany).
Sealed the 25th January 1878, and dated the 15th August 1877.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office
of the Commissioners of Patents on the 15th August 1877.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort-on-the-Main, in the Empire of Germany. "IMPROVEMENTS IN THE
TREATMENT OF THE RESIDUES OF WINE FOR MANUFACTURING TARTARIC ACID
AND TARTARIC SALTS." [A communication from Franz Dietrich, Chemist, of Murten
(Switzerland), and Guido Schnitzer, of Schwäbisch Hall (Germany).]
In the manufacture of tartaric acid and tartaric salts it is usual to employ as raw
material the residues of wine, which consist of tartar yeast, dross, and similar
residues. The tartaric salts contained in these residues must be separated from
their impurities; but such separation is very difficult, as the accompanying substances
(consisting, generally of yeast, mucilage, and extractive matters) are in consequence
of their mucilaginous properties very difficult to be separated, and in certain cases
they render the said separation impossible.
2
This Invention has for its object to remove these inconveniences and to facilitate
a separation of the said salts from the said impurities.
The said Invention consists of heating the said residues, according to their nature
or to the means employed, for a greater or less time to a temperature of about 140
[Price Adil

page_text: to 170° C. This heating causes the foreign matters to become partly insoluble and
partly to be transformed into a condition in which they do not further oppose a
quick separation, which is effected by any suitable means.
The heating is effected in closed or unclosed vessels by means of an open fire, or
of hot baths, or of superheated steam or steam under pressure, or by any other
suitable means capable of heating the said substances to a heat of from about 140
to 170° C.
It would be preferable to heat the said residues in a dry state. For the liquid
yeast, and where the same cannot be transformed into a dry state, closed vessels are
used in which the heating is effected by direct.ateam:
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 11th February
1878.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort-on-the-Maine, in the Empire of Germany. "IMPROVEMENTS IN THE
TREATMENT OF THE RESIDUES OF WINE FOR MANUFACTURING TARTARIC ACID
AND TARTARIC SALTS." A communication from Franz Dietrich, Chemist, of Murten
(Switzerland), and Guido Schnitzer, of Schwäbisch-Hall (Germany).
In the manufacture of tartaric acid and tartaric salts it is usual to employ as raw
material the residues of wine making, which consist of tartar and argol, the solid
portions of the grape, impure tartar lees (wine lees), yeast, dross, and similar
matters. The tartaric salts contained in these residues must be separated from their
impurities, but such separation is very difficult, as the accompanying substances
(consisting generally of yeast, mucilage, and extractive matters) are in consequence
of their mucilaginous properties very difficult to be separated, and in certain cases
they render the said separation impossible.
This Invention has for its object to obviate these inconveniences and to facilitate
a separation of the said salts from such impurities.
The said Invention consists in heating the said residues, according to their nature
or to the means employed, for a longer or shorter time to a temperature of about 140
to 170 degrees Centigrade. This heating causes the foreign matters to become partly
insoluble and to be partly transformed into a condition in which they do not further
resist a quick separation, which is effected by any suitable means.
The heating is effected in closed or unclosed vessels by means of an open fire, hot
water, superheated or other steam, or by any other suitable means capable of heating
the said substances to a temperature of from about 140 to 170 degrees centigrade.
It is preferable to beat the said residues in a dry state.
Having thus fully described the said Invention and the manner in which the
same is to be carried into practice, I wish it understood that I claim the

page_text: treatment of the residues of wine by heating the same to a temperature of about
140 to 170 degrees Centigrade, as above described and for the purpose set forth.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand and
seal, this Seventh day of February, in the year of our Lord One thousand
eight hundred and seventy-eight.
FRANK WIRTH. (L.S.)