A NEW OR IMPROVED PROCESS FOR THE MANUFACTURE OF HYPOSULPHITE OF SODA
Year: 1882

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the
firm of J. Brandt & G. W. v. Nawrocki, Patent Solicitor, and Civil Engineer
of 124 Leipzigerstrasse, Berlin, Germany, for an invention of A NEW OR
IMPROVED PROCESS FOR THE MANUFACTURE OF HYPOSULPHITE OF SODA
A communication from the Verein chemischer Fabriken, of Mannheim,
Germany.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 29th June
1882.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt
and G. W. v. Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse,
Berlin, Germany. "A NEW OR IMPROVED PROCESS FOR THE MANUFACTURE OF
HYPOSULPHITE OF SODA," a communication from the Verein chemischer Fabriken,
of Mannheim, Germany.
This process of making liyposulphite of soda consists in mixing tank-waste with
sulphate of soda and water, exposing this mixture to the air and lixiviating the
product of the reaction with water. Fresh or oxidized tank-waste is mixed with
ground sulphate of soda in quantities equivalent to the sulphide of calcium
contained in the tank-waste. At the same time water is added sufficient to
dissolve the sulphate of soda. The mixture is piled up in heaps which are to be
restricted to an appropriate size in order to prevent the temperature in the same
from rising above 100° Centigrade. The result of the reaction of the oxygen of
the atmospheric air on this mixture-chiefly sulphate of lime and hyposulphite of
soda is lixiviated. Sulphide of sodium which happens to be in the lye is reduced
in the well-known way by means of oxygen and sulphurous acid to hyposulphite
of soda. The solution is evaporated to crystallization.
:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office
on the 22nd December 1882.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt and
G. W. v. Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse,
Berlin, Germany "A NEW OR IMPROVED PROCESS FOR THE MANUFACTURE OF
HYPOSULPHITE OF SODA," a communication from the Verein chemischer Fabriken,
of Mannheim Germany."
.
This process of making Hyposulphite of Soda consists in mixing tank waste (that
is the residue of the manufacture of soda, which consists chiefly of calcic sulphide,
calcic carbonate, and lime) with sulphate of soda and water, exposing this mixture
to the air and lixiviating the product of the reaction with water. Fresh or
oxydised tank-waste is mixed with ground sulphate of soda in quantities equivalent
to the sulphide of calcium contained in the tank-waste. At the same time water
is added sufficient to dissolve the sulphate of soda. The mixture is piled up in
heaps which are to be restricted to an appropriate size in order to prevent the
temperature in the same from rising above 100° Centigrade. The result of the
reaction of the oxygen of the atmospheric air on this mixture-chiefly sulphate of
lime and'hyposulphite of soda is lixiviated. Sulphide of sodium which happens
to be in the lye is reduced in the well-known way by means of oxygen and
sulphurous acid to hyposulphite of soda.
The solution is evaporated to ervstallisation
CLAIM.
The reaction of sulphate of soda on tank-waste with the cooperation of water,
heat and atmospheric air substantially as described.
In witness whereof I the said Gerard Wenzeslaus von Nawrocki have
hereunto set my hand and seal this eighteenth day of December AD 1882.
GERARD WENZESLAUS VON NAWROOKL