THE PRODUCTION OF NEW COLORING MATTERS FOR DYEING AND PRINTING
Year: 1878

page_text: LETTERS PATENT to Carl Alexander Martius, of the Actien Gesellschaft fuer
Anilin Fabrikation, of Berlin, in the German Empire, but at present of No.
20, Southampton Buildings, Chancery Lane, in the County of Middlesex,
for the Invention of "THE PRODUCTION OF NEW COLORING MATTERS FOR
DYEING AND PRINTING."
Scaled the 21st January 1879, and dated the 31st October 1878.
PROVISIONAL SPECIFICATION left by the said Carl Alexander Martius at
the Office of the Commissioners of Patents on the 31st October 1878.
CARL ALEXANDER MARTIUS, of the Actien Gesellschaft fuer Anilin Fabrikation,
of Berlin, in the German Empire, but at present of No. 20, Southampton Buildings,
Chancery Lane, in the County of Middlesex. "THE PRODUCTION OF NEW
COLORING MATTERS FOR DYEING AND PRINTING."
The green coloring matters produced according to the process described in C. D.
Abel's Patent, No. 828, of 1878, by the action of benzo-trichlorides or chlorinated
benzo-trichlorides on aromatic tertiary amines in presence of metallic chloride
consist generally of a double salt formed by the chloride of a colorless base with
chloride of zinc. The neutral salts of the colorless base form green solutions, whilst
the acid salts show a yellow color.
When the bases of these green coloring matters or their corresponding salts, such
as chlorides or sulphates, are heated with an excess of concentrated sulphuric acid,
sulpho-acids are produced which have the same peculiarities as the sulpho-acids
of aniline blue, and, like these, can be used for dyeing and printing.
For the production of these sulpho-acids on a large scale, the following process
may serve as an example:-10 parts of the before-mentioned base dried at 212°
Fahr., or the equivalent quantity of a salt thereof, such as chloride, are mixed
under continual stirring with 90 parts of fuming sulphuric acid.
77

page_text: When the color is entirely dissolved in the acid the mass is heated until a
sample thereof gives no more precipitate with an alkali; when quite cool the mass
is poured into an excess of cold-water. This solution is then neutralised with milk
of lime or other alkaline-base and heated to boiling point, and the sulphate of lime-
then formed is separated by filtration.
From-the-clear solution after cooling a portion of the lime salt is deposited in the
form of colorless crystalline crusts, and the remainder-is-gained by evaporation of
-the-solution.
The lime salt thus prepared is readily soluble in boiling water, and assumes.on
addition of weak mineral or organic acids an intense green coloration, and can be
at once employed-for-dyeing-and-printing-purposes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Carl Alexander Martius in the Great Seal Patent Office on the
23rd April 1879.
CARL ALEXANDER MARTIUS, of the Actien Gesellschaft fuer Anilin Fabrikation,
of Berlin, in the German Empire, but of present of No. 20, Southampton Buildings,
Chancery Lane, in the County of Middlesex. "THE PRODUCTION OF NEW
COLORING MATTERS FOR DYEING AND PRINTING."
The green coloring matters produced according to the process described in C. D.
Abel's Patent, No. 828, of 1878, by the action of benzo-trichlorides or chlorinated
benzo-trichlorides fon aromatic tertiary amines in presence of a metallic chloride
consist generally of a double salt formed by the chloride of a colorless base with
the chloride of zinc. The neutral salts of the colorless base form green solutions,
whilst the acid salts show a yellow color.
When the bases of these green coloring matters or their corresponding salts, such
as chlorides or sulphates, are heated with an excess of concentrated sulphuric acid,
sulpho-acids are produced which have the same peculiarities as the sulpho-acids of
aniline blue, and like these can be used for dyeing and printing.
For the production of these sulpho-acids on a large scale, the following process
may serve as an example:-
10 parts of the before-mentioned base dried at 212° Fahr., or the equivalent
quantity of a salt thereof, such as chloride, are mixed under continual stirring with
90 parts of fuming sulphuric acid.
When the colour is entirely dissolved in the acid the mass is heated until a sample
thereof gives no more precipitate with an alkaline; when quite cool the mass is
poured into an excess of cold water. This solution is then neutralised with milk of
lime or other alkaline base and heated to boiling point, and the sulphate of lime
then formed is separated by filtration.
From the clear solution, after cooling, à portion of the lime salt is deposited in
the form of colorloss crystalline crusts, and the remainder is gained by evaporation
of the solution.
The lime salt thus prepared is readily soluble in boiling water, and assumes on
addition of weak mineral or organic acids an intense green coloration, and can be
at once employed for dyeing and printing purposes.
Having thus described the nature of my Invention, and in what mannor the
same is to be performed, I claim the production of the sulpho-acid coloring matters
from the green coloring matters formed by the action of benzo-trichloride or chlor-
inated benzo-trichlorides on aromatic tertiary amines in the presence of metallic
chloride, such new coloring matters being applicable for dyeing and printing,
substantially as herein described.
In witness whereof, I, the said Carl Alexander Martius, have hereunto set
my hand and seal, this Twenty-first day of April, in the year of our Lord
One thousand eight hundred and seventy-nine
C. A. MARTIUS. (L.S.)