IMPROVEMENTS IN COLOURING MATTERS AND IN THE MANU- FACTURE OF THE SAME.
Year: 1878

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
Invention of "IMPROVEMENTS IN COLOURING MATTERS AND IN THE MANU-
FACTURE OF THE SAME. A communication from Wilhelm Meister, Eugen
Lucius, Doctor of Philosophy, and Adolphus Brüning, Doctor of Philosophy,
persons trading under the Firm of "Meister, Lucius, and Brüning," of
Höchst-on-the-Main, in the Empire of Germany.
Sealed the 20th September 1878, and dated the 29th April 1878.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office of
the Commissioners of Patents on the 29th April 1878.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frank-
fort on the Main, in the Empire of Germany. "IMPROVEMENTS IN COLOURING
MATTERS AND IM THE MANUFACTURE OF THE SAME." [A communication from
Wilhelm Meister, Eugen Lucius, Doctor of Philosophy, and Adolphus Brüning,
Doctor of Philosophy, persons trading under the Firm of "Meister, Lucius, &
Brüning," of Höchst on the Main, in the Empire of Germany.]
This Invention has for its object the manufacture of red, yellow, and brown
colours from the two disulfobetanaphtolic acids by the action of diazo-compounds
produced from aniline, toluidine, and xylidine, and also from the higher homologues
obtained by the introduction of aethyle and methyle into these amids, and besides
from naphtylamine.
The colours obtained by my method being quite fast are able to replace cochineal,
annotto, and archil in dyeing and in printing.
Quite new is the production and separation of the isomere disulfobetanaphtolic
acids, and also the action of the same on the diazo-compounds named.
My method consists in,-
1. The production and separation of the two disulfobetanaphtolic acids.
2. The production of coloring matter by the action of the diazo-compounds,

page_text: Production of the disulfobetanaphtolic acids.
I take 10 parts of betanaphtol, mix them with 30 parts of English sulphuric
acid, and heat this mixture for 12 hours at 212-230° Fahrenheit. From the
thus obtained disulfobetanaphtolic acids I produce the soda salts, thereby two
isomere disulfobetanaphtolic soda salts are produced, which are easily separated by
treating them with alcohol of 85-95°. For their separation the mixture is to be
digested with 3 or 4 parts of alcohol, and the insoluble salt (which I call salt R)
filtered and dried. The dissolved salt (which I call salt Y) is extracted by evapo-
ration and dried; salt R produces the red shades and salt Y the yellow shades.
I dissolve 61/2 parts of xylidine in 12 parts of hydrochloric acid of 1·16-1.18
specific gravity, and 100 parts of water; I add to this solution by allowing it
to cool 41/2 parts of nitrite of potash of 100%. The solution of the thus obtained
diazoxylolchlorid is afterwards poured into a solution of 20 parts, salt R dis-
solved in 200 parts of water, and 10 parts ammonia of 10%, after which
operation the coloring matter precipitates in a red paste. I dissolve this paste,
precipitate the coloring matter with salt, and dry the same; I thus obtain a red
powder which is now ready for sale, and which can be used for silk and wool-
dyeing instead of cochineal, and which stands light and scouring equally well.
5 parts of aniline are, as described, converted into the diazo-compound; these are
allowed to act upon 20 parts of salt Y dissolved in 200 parts of water, to which
10 parts of ammonia are added; I thus obtain a yellow coloring matter, which
produces shades somewhat redder than phosphine and which are completely fast.
It in method IV. 1 replace the aniline by naphtylamine, I obtain a coloring
matter producing a yellower shade than claret R of method III.
VI. Scarlet Y.
If in method IV. I replace the aniline by amidoaethylxylol I obtain a coloring
matter producing yellow scarlet shades.
I desire it to be understood that I do not confine myself to the exact proportious
or materials herein-before described, the Invention consisting of,-
1. The manufacture of disulfobetanaphtolic acids.
2. The manufacture of red, yellow, and brown coloring matter, resulting from
the action of the two disulfobetanaphtolic acids on diazo-compounds obtained in the
described manner from aniline, toluidine, and xylidine, and also from the higher
homologues obtained by the introduction of methyle and aethyle into these amids
and besides from naphtylamine.

page_text: I dissolve 61/2 parts of xylidine in 12 parts of hydrochloric acid of 1·16-118
specific gravity, and 100 parts of water; I add to this solution by allowing it
to cool 4/2 parts of nitrate of potash of 100%. The solution of the diazo-
xylolchlorid thus obtained is afterwards poured into a solution of 20 parts, salt R
dissolved in 200 parts of water and 10 parts of ammonia of 10%, after which
operation the coloring matter precipitates in a red paste. I dissolve this paste,
precipitate the coloring matter with salt, and dry the same; I thus obtain a red
powder which is now ready for sale, and which can be used for silk and wool
dyeing instead of cochineal, and which stands light and scouring equally well.
By using amidoaethylxylol in the same manner as above described I obtain a
coloring matter, which dyed on silk and wool gives finer and redder shades than
cochineal, and is quite as fast.

page_text: Process IV. Orange.
5 parts of aniline are converted into the diazo-compound; these are allowed to
act upon 20 parts of salt Y dissolved in 200 parts of water, to which 10 parts of
ammonia are added; I thus obtain a yellow coloring matter which produces shades
somewhat redder than phosphine and which are completely fast.
Process VI. Scarlet Y.
If in process IV. the aniline is replaced by amidoaethylxylol I obtain a coloring
matter producing yellow scarlet shades.
Having thus fully described the said Invention, and the manner of performing
the same, I wish it understood that I do not limit myself to the exact proportions
or materials herein before described, and that I claim,-
First. The manufacture of disulfobetanaphtolic acids, substantially as above set
forth.
Second. The manufacture of red, yellow, and brown coloring matter resulting
from the action of the two disulfobetanaphtolic acids on diazo-compounds, obtained
in the manner above described from aniline, toluidine, and xylidine, and also from
the higher homologues obtained by the introduction of methyle and aethyle into
these amids, and besides from naphtylamine.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand
and seal, this Twenty second day of October, in the year of our Lord One
thousand eight hundred and seventy eight.