Year: 1886

page_text: I, CHARLES ALEXANDER MÁRTIUS of Berlin in the Kingdom of Prussia, Empire
of Germany, Direktor of the Actiengesellschaft für Anilinfabrikation, do hereby.
declare the nature of this invention to be as follows:-
'
I have discovered that the solutions of salts of tetrazodiphenyle, of tetrazoditolyle
or tetrazodiaylyle in acting upon amines or phenoles or sulpho-acids or carbo-acids,
even when these substances are in excess react in such manner that at first only
one molecule of the tetrazo-compound combines with one molecule of the amine,
phenole, sulpho-acid or carbo-acid.
The first product obtained in such a way, containing sti
still one free diazo-group is
capable of being combined again with the same or another amine, phenole, sulpho-
acid or carbo-acid forming in this way a new azo-colour; a great variety of simple
and mixed azo-colours may be produced from the tetrazo-compounds mentioned
above. The results of this invention show that the salts of tetrazodiphenyle or
tetrazoditolyle can give simple or mixed azo-colours with the following classes of
compounds.
1. Amines.
a, primary amines, like aniline, toluidine, xylidine, a naphthyl-amine, 6 naph
thyl-amine, benzidine, toluidine, amidoazobenzole, amidoazotoluolė etc.
b, secondary amines, like diphenylamine, monomethylaniline, monoethyl-
aniline.
c, tertiaryamines, like dimethylaniline, diethylaniline.
2. Sulpho-acids of amines mentioned under 1, 48 sulphanilic-acid naphthylamine-
sulpho acid, dimethylaniline-sulpho-acid.
3. Carbo-acids of the amines mentioned under 1, as amidobenzoic-acid amido-
toluyle-acid
4. Phenoles, as Carbolic-acid, cresote, a naphthole, B naphthole resorcine.
5. Phenole-sulpho-acids: sulpho-carbolic-acid, a naphthole-sulpho-acid, ẞ naph-
thole-monosulpho-acid; 8 naphthole-disulpho-acid.
6. Phenole-carbo-acids, as salicylic-acid, a oxynaphthoë-acid, ẞ oxynaphthoë-
acid.
The general process for producing such mixed azo-colours consists in combining
at first one molecule of the tetrazo-compound with one molecule of the substances
mentioned sub. 1 to 6 and combining this intermediate product further with one
molecule of any one of the substances belonging to these six classes.
[Pine Bil
'

page_text: Simple colours, i.e. such colours as are obtained by combining one molecule of
tetrazo-compound with two molecules of the same substance of the six classes
mentioned above, are already known and have been patented. To this class belong
the colours known in commerce as "Congo," "Benzopurpurine" and "Chrysamine."
A process has already been patented for the production of mixed azo-colours from
salts of tetrazodiphenyle and tetrazoditolyle, which consists in reacting with the
intermediate product-formed by the combination of one of these salts with an
amine or an amido-sulpho-acid, a phenole or a phenole-sulpho-acid-upon another
amine or amido sulpho-acid.
This invention refers to those combinations mentioned above which are not yet
patented.
The following examples may explain my process.
1. Benzidine+a-naphthole-sulpho-acid + a-naphthylamine-sulpho acid. 184.
kilogrammes of benzidine are converted in the well known manner into the
tetrazo-compound. The solution of the same is entered into a solution of 24.6
kilogrammes of a naphthole-monosulpho-acid and 32 kilogrammes of acetate of
Boda. If now a solution of 24.5. kilogrammes of dry a-naphthylamine-sulphonate
of soda in 100 litres of water is added and the mixture stirred for a longer period,
an axo-colour is formed, which dyes cotton a brown-violet shade.
2. Benzidine plus ẞ naphthole-disulpho-acid R plus B-naphthylamine-sulpho-acid.
This colour is obtained in the same manner as that described under 1. 18.4 kilo-*
grammes of benzidine are added to 34.8 kilogrammes of ẞ naphthole-disulphonate
of soda (R salt) and 24.5 kilogrammes of 3 naphthylamine sulphonate of soda.
3. Toluidine plus a naphthole-sulpho-acid plus ẞ naphthole-disulpho acid R.
The toluidine acts in a quite analogous manner to the benzidine. 21.2 kilogrammes
of toluidine, 246. kilogrammes of a naphthole-monosulphate of soda and 34.8 kilo-
grammes of naphthole-disulphonate of soda (R) have to be used.
4. Toluidine plus a naphthole-disulpho-acid plus ẞ naphthole. The naphthole-
disulpho-acid R in the example can be replaced by the equivalent quantity of
naphthole (14.4 kilogr.)
5. 18.4 kilogrammes of benzidine are converted with muriatic acid and nitrite of
soda into the chloride of tetrazodiphenyle and mixed in presence of acetate of soda
with a solution of 19.5 kilogrammes of sulphanilate of soda. A brown yellow
precipitate is formed; this precipitate acting upon an alkaline solution of salicylate
of soda, a colour is obtained which in an alkaline soap-bath dyes directly a yellow
colour on cotton.
0
6. The process in the example 1 may also be reversed by acting at first with
chloride of tetrazodiphenyle upon salicylate of soda and afterwards upon sulphanilate
of soda.
7. In the examples 1 and 2 the sulphanilic acid or, the salicylic acid may be
replaced by the equivalent quantities of amido-benzoic-acid.
8. In the Patent No. 4415 of 1884 the naphthionic-acid can be replaced by the
amido-benzoic-acid.

page_text: I, CHARLES ALEXANDER MARTIUS, of Berlin in the Kingdom of Prussia,
Empire of Germany, Direktor of the Actiengesellschaft für Anilinfabrikation,
do hereby declare the nature of this invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the
following statement :-
I have discovered that the solutions of salts of tetrazodiphenyle, of tetrazoditolyle
or tetrazodixylyle in acting upon amines or phenoles or sulpho-acids or carbo-acids,
even when these substances are in excess react in such manner that at first only
one molecule of the tetrazo compound combines with one molecule of the amine,
phenole, sulpho-acid or carbo-acid.
- The first product obtained in such a way containing still one free diazo group is
capable of being combined again with the same or another amine, phenole, sulpho-
acid or carbo-acid, forming in this way a new azo color; a great variety of simple
and mixed azo colors may be produced from the tetrazo-compounds mentioned
above. The results of this invention sbew that the salts of the tetrazodiphenyle or
tetrazoditolyle can give simple or mixed azo colors with the following classes of
compounds.
I: Amines.
a, primary amines, like aniline, toluidine, xylidine a naphthyl-amine, ẞ naph-
thyl-amine, benzidine, tolidine, amidoazobenzole, amidoazotoluole, etc.
b, secondary amines, like diphenylamine, monomethylaniline, monoethyle
aniline.
c, tertiary amines, like dimethylaniline, diethylaniline.
2. Sulpho-acids of amines mentioned under 1 as sulphanilic acid, naphthylamine-.
sulpho-acid, dymethyaniline-sulpho-acid.
3. Carbo-acids of the amines mentioned under 1 as amido-benzoic acid amido-
toluyle acid.
4. Phenoles as carbolic-acid, creosote a naphthole, ẞ naphthole, resorcine.
)
5. Phenole-sulpho-acids: sulpho carbolic acid, a naphthole sulpho-acid, B naph-
thole monosulpho-acid, 3 naphthole disulpho-acid.
6. Phenole-carbo-acids as salicylic acid, a oxynaphtoë acid, Bozynaphtoë acid.
The general process for producing such mixed azo colors consists in combining
at first one molecule of the tetrazo compound with one molecule of the substances
mentioned under paragraphs 1 to 6 inclusive and combining this intérmediate
product further with one molecule of any one of the substances belonging to these
six classes.
.
Simple colors, i.e. such colors as are obtained by combining one molecule of
tetrazo-compound with two molecules of the same substance of the six classes
mentioned above, are already known and have been patented. To this class
belong the colors known in commerce as "Congo," Benzopurpurine" and "Chrys,
amine."
3) "
A process has already been patented for the production of mixed azo colors
from salts of tetrazodiphenyle and tetrazoditolyle, which consists in reacting with
the intermediate product formed by the combination of one of these salts with an

page_text: amine or an amido-sulpho-acid, a phenole or a phenole-sulpho-acid upon another
amine or amido-sulpho-acid.
The present invention refers to those combinations mentioned above which are
not described in the Specifications of the Patents above referred to.
The following examples may explain my process.
1. Benzidine + a naphthole-sulpho-acid + a naphthylamine-sulpho-acid. 18.4
kilogrammes of benzidine are converted in the well known manner into the
tetrazo-compound. The solution of the same is poured into a solution of 24.6 kilo-
grammes of a naphthole-monosulpho-acid and 32 kilogrammes of acetate of soda.
If now a solution of 24-5 kilogrammes of dry a naphthylamine sulphonate of soda
in 100 litres of water is added and the mixture stirred for several hours, an azo
color is formed, which dyes cotton a brown violet shade.
2. Benzidine + B naphthole-disulpho-acid R + 3 naphthylamine-sulpho acid.
This color is obtained in the same manner as that described under 1. 18.4 kilo-
grammes of benzidine are added to 34.8 kilogrammes of B naphthole-disulphonate
. of soda (R salt) and 24.5 kilogrammes of B naphthylamine-sulphonate of soda.
3. Tolidine a naphthole-sulpho-acid + naphthole-disulpho-acid R.
tolidine acts in a quite analogous manner to the benzidine. 21.2 kilogrammes of
tolidine, 24-6 kilogrammes of a naphthole-monosulphate of soda and 34.8 kilo-
grammes of ẞ naphthole disulphonate of soda (R) have to be used as in 1.
The
4. Tolidine a naphthole-disulpho-acid + Snaphthole. The naphthole-disulpho-
acid R in the example 3 can be replaced by an equivalent quantity of naphthole
namely 144 kilogrammes thereof.
5. Benzidine + sulphanilic acid + salicylic acid. 18.4 kilogrammes of benzidine
are converted with hydrochloric acid and sodium nitrite into the chloride of tetrazo-
diphenyle and mixed in presence of acetate of soda with a solution of 19.5 kilo-
grammes of sulphanilate of soda. A brown yellow precipitate is formed; this
precipitate acting upon an alkaline solution of salicylate of soda, a colour is
obtained which, in an alkaline soap bath dyes directly a yellow color on cotton.
6. The process in the example 5 may also be reversed by acting at first with
chloride of tetrazodiphenyle upon salicylate of soda and afterwards upon sulph-
anilate of soda.
7. In the examples 5 and 6 the sulphanilic acid or the salicylic acid may be
replaced by the equivalent quantities of amido-benzoic-acid.
8. The naphthionic acid mentioned in the specification No. 4415 of 1884 can be
replaced by the amido-benzoic-acid.
The tetrazo compounds referred to in the above examples are of the type of
tetrazodiphenyle which is expressed by the formula C₁₂H, {N
N = N-
N_
Portions of the hydrogen may, as is well known, be replaced by equivalent
combined radicles, for instance by methyle as in tetrazoditolyle, having the
formula
C₁₂ H. (CH.) 2
C12 H6
(N = N-
(N= N.
-
=
or in tetrazodixylile C, H. (CH) 4 {NN-
In like manner the sulpho group may be substituted for part of the methyle as
in the sulpho-acid of tetrazodiphenyle C₁, H. (SO, H) 2 {N = N or the sulpho-
acid of tetrazoditolyle, having the formula С H (CH) 2 (SO, H) 2 {N = N-
N = N-
By employing such substitutions, the process may be farther varied, thus
9. Tetrazodiphenyle sulpho acid + B naphthylamine + B naphthylamine-
sulpho-acid. 37.2 kilogrammes of benzidine-di-sulpho-acid are converted into its
tetrazo compound by the action of 25 kilogrammes of hydrochloric acid and
13.8 kilogrammes of sodium nitrite. This tetrazo compound is then combined with
14.3 kilogrammes of ẞ naphthylamine dissolved in dilute hydrochloric acid, and
finally the intermediate product thus obtained is acted on by an alkaline solution
of 25.4 kilogrammes of ẞ naphthylamine-mono-sulphonate of sodium.
•

page_text: If benzidine carbonic acid or its homologues be substituted for benzidine-
disulpho-acid, analogous colours will be obtained.
10. Tolidine-disulpho-acid + a naphthylamine + B naphthylamine. 42 kilo-
grammes of tolidine-disulpho-acid are converted into its tetrazo-compound by the
action of hydrochloric acid and a solution of 13.8 kilogrammes of sodium nitrite.
This tetrazo-compound is then combined first with 14.3 kilogrammes of a naph-
thylamine in a hydrochloric solution, and, finally, the intermediate product
thus obtained and 143 kilogrammes of 3 naphthylamine are dissolved in hydro-
chloric acid.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
:
For the production of mixed azo colors, the process, substantially as herein
described, wherein the intermediate product formed by the combination of one
molecule of tetrazodiphenyle or its equivalent (such as tetrazodixylile, or tetrazo-
diphenyle sulpho acid) with one molecule of an amine, an amido-sulpho-acid,
amido-carbo-acid, phenole or phenole-carbo-acid, is combined with a second
molecule of another of the substances last mentioned.
Dated this 26th day of October 1886.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, London, W.C.

page_text: This Specification was, upon the 26th day of April 1890, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
I, CHARLES ALEXANDER MARTIUS of Berlin in the Kingdom of Prussia, Empire
of Germany, Direktor of the Actiengesellschaft für Anilinfabrikation, do hereby
declare the nature of this invention to be as follows:
I have discovered that the solutions of salts of tetrazodiphenyle, of tetrazoditolyle
or tetrazodiaylyle in acting upon amines or phenoles or sulpho-acids or carbo-acids,
even when these substances are in excess react in such manner that at first only
one molecule of the tetrazo-compound combines with one molecule of the amine,
phenole, sulpho-acid or carbo-acid.
The first product obtained in such a way, containing still one free diazo-group if
capable of being combined again with the same or another amine, phenole, sulpho-
acid or carbo-acid forming in this way a new azo-colour; a great variety of simple
and mixed azo-colours may be produced from the tetrazo-compounds mentioned
above. The results of this invention shew that the salts of tetrazodiphenyle or
tetrazoditolyle can give simple or mixed azo-colours with the following classes of
compounds.
1. Amines.
a, primary amines, like aniline, toluidine, xylidine, a naphthyl-amine, 's naph-
thyl-amine, benzidine, toluidine, amidoazobenzole, amidoazotoluole etc.
b, secondary amines, like diphenylamine, monomethylaniline, monoethyl-
aniline.
c, tertiaryamines, like dimethylaniline, diethylaniline.
2. Sulpho-acids of amines mentioned under 1, as sulphianilic-acid naphthylamine-
sulpho acid, dimethylaniline-sulpho-acid.
3. Carbo-acids of the amines mentioned under 1, as amidobenzoic-acid amido-
toluyle-acid.
.
i
1.
4. Phenoles, as Carbolic-acid, cresote, a naphthole, a naphthole resorcine.
B
5. Phenole-sulpho-acids: sulpho-carbolic-acid, a naphthole-sulpho-acid, s naph-
thole-monosulpho-acid, s naphthole-disulpho-acid.
6. Phenole-carbo-acids; as salicylic-acid, a oxynaphthoë-acid, B oxynaphthoë-
acid.
The general process for producing such mixed azo-colours consists in combining
at first one molecule of tetrazo-compound with one molecule of the substances
mentioned sub. 1 to 6 and combining this intermediate product further with one
molecule of any one of the substances belonging to these six classes.

page_text: Simple colours, i.e. such colours as are obtained by combining one molecule of
tetraxo-compound with two molecules of the same substance of the six classes
mentioned above, are already known and have been patented. To this class belong
the colours known in commerce as Congo," "Benzopurpurine" and "Chrysamine."
A process has already been patented for the production of mixed azo-colours from
salts of tetrazodiphenyle and tetrazoditolyle, which consists in reacting with the
intermediate product-formed by the combination of one of these salts with an
amine or an amida-sulpho-acid, à phenole or a phenole-sulpho-acid-upon another
amine or amido sulpho-acid.
This invention refers to those combinations mentioned above which are not yet
patented.
The following examples may explain my process.
1. Benzidine + a-naphthole-sulpho-acid + a-naphthylamine-sulpho acid. 18.4
kilogrammes of benzidine are converted in the well known manner into the
tetrazo-compound. The solution of the same is entered into a solution of 24.6
kilogrammes of a raphthole-monosulpho-acid and 32 kilogrammes of acetate of
soda. If now a solution of 24.5. kilogrammes of dry a-naphthylamine-sulphonate
of soda in 100 litres of water is added and the mixture stirred for a longer period,
an azo-colour is formed, which dyes cotton a brown-violet shade.
2. Benzidine plus s naphthole-disulpho-acid R plus 8-naphthylamine-sulpho-acid.
This colour is obtained in the same manner as that described under 1. 18.4 kilo-
grammes of benzidine are added to 34-8 kilogrammes of a naphthole-disulphonate
of soda (R salt) and 24.5 kilogrammes of a naphthylamine sulphonate of soda.
β
3. Toluidine plus α naphthole-sulpho-acid plus a naphthole-disulpho acid R.
The toluidine acts in a quite analogous manner to the benzidine. 21.2 kilogrammes
of toluidine, 24.6. kilogrammes of a naphthole-monosulphate of soda and 34.8 kilo-
grammes of naphthole-disulphonate of soda (R) have to be used.
4. Toluidine plus a naphthole-disulpho-acid plus B naphthole. The naphthole-
disulpho-acid R in the example 3 can be replaced by the equivalent quantity of
B naphthole (14.4 kilogr.)
5. 18.4 kilogrammes of benzidine are converted with muriatic acid and nitrite of
soda into the chloride of tetrazodiphenyle and mixed in presence of acetate of soda
with a solution of 195 kilogrammes of sulphanilate of soda. A brown yellow
precipitate is formed; this precipitate acting upon an alkaline solution of salicylate
of soda, a colour is obtained which is an alkaline soap-bath dyes directly a yellow
colour on cotton.
6. The process in the example 1 may also be reversed by acting at first with
chloride of tetrazodiphenyle upon salicylate of soda and afterwards upon sulphanilate
of soda.
7. In the examples 1 and 2 the sulphanilic acid or, the salicylic acid may be
replaced by the equivalent quantities of amido-benzoïc-acid.
8. In the Patent No. 4415 of 1884 the naphthionic-acid can be replaced by the
amido-benzoïc-acid.
Dated this 15th day of February 1886.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, London, W.C.

page_text: I, CHARLES ALEXANDER MARTIUS, of Berlin in the Kingdom of Prussia,
Empire of Germany, Direktor of the Actiengesellschaft für Anilinfabrikation,
do hereby declare the nature of this invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the
following statement :-
I have discovered that the solutions of salts of tetrazodiphenyle, or of tetrazoditolyle
or tetrazodixylyle in acting upon amines or phenoles or their sulpho acids or carbonic-
acids, even when these substances are in excess react generally in such manner that at
first only one molecule of the tetrazo compound combines with one molecule of the
amine, phenole, sulpho-acid or carbonic-acid.
The first product obtained in such a way containing still one free diazo group
capable of being combined again with the same or another amine, phenole, sulpho-
acid or carbonic-acid, forming in this way a new azo colour; a great variety of simple
and mixed azo colours may be produced from the tetrazo-compounds mentioned
above. The results of this invention shew that the salts of the tetrazodiphenyle or
tetrazoditolyle can give simple or mixed azo colours with the following classes of
compounds.
1. Amines.
a, primary amines, like aniline, toluidine, xylidine a naphthyl-amine, a naph-
thyl-amine, benzidine, tolidine, amidoazobenzole, amidoazotoluole, etc.
b. secondary amines, like diphenylamine, monomethylaniline, monoethyl-
aniline.
c, tertiary amines, like dimethylaniline, diethylaniline.
2. Sulpho-acids of amines mentioned under I as sulphanilic acid, naphthylamine-
sulpho-acid, dimethylaniline-sulpho-acid.
3. Carbo-acids of the amines mentioned under 1 as amido-benzoic acid, amido-
toluyle acid.
4. Phenoles as carbolic-acid, creosote, a naphthole, a naphthole, resorcine.
5. Phenole-sulpho-acids: sulpho carbolic acid, a naphthole sulpho-acid, a naph-
thole monosulpho-acid, s naphthole disulpho-acid.
6. Phenole-carbo-acids as salicylic acid, a oxynaphtoë acid, s ozynaphtoë acid.
The general process for producing such mixed azo colors consists in first combining
at first one molecule of the tetrazo compound with one molecule of the substances
mentioned under paragraphs 1 to 6 (inclusive) and then combining this intermediate
product further with one molecule of any one of the substances belonging to these
six classes.
Simple colors, i.e. such colors as are obtained by combining one molecule of
tetrazo-compound with two molecules of the same substance of the six classes
mentioned above, are already known and have been patented. To this class
belong the colors known in commerce as Congo," "Benzopurpurine" and "Chrys-
amine," and "Azoblau."
<<
A process has already been patented for the production of mixed azo colors
from salts of tetrazodiphenyle and tetrazoditolyle, which consists in reacting with
the reaction of the intermediate product, formed by the combination of one of these

page_text: salts with an naphthyl amine or an amido naphthylamine sulpho-acid, a phenole or a
phenole-sulpho-acid upon another amine or amido-sulpho-acid, or a phenole or a
phenole-sulpho acid or vice versa.
18.4
The present invention refers to those combinations mentioned above which are
not described in the Specification of the Patents above referred to.
The following examples may explain my process.
1. Benzidine
naphthylamine-sulpho-acid.
a naphthole-sulpho-acid + a
kilogrammes of benzidine are converted in the well known manner into the
tetrazo-compound. The solution of the same is poured into a solution of 24-6 kilo-
grammes of a naphtole-monosulpho-acid and 32 kilogrammes of acetate of sodium.
If now a solution of 24.5 kilogrammes of dry a naphthylamine sulphonate of sodium
in 100 litres of water is added and the mixture stirred for several hours, an azo
color is formed, which dyes cotton a brown violet shade.
2. Benzidine naphthole-disulpho-acid R + B naphthylamine-sulpho acid.
This color is obtained in the same manner as that described under 1. For 18.4 kilo-
grammes of benzidine-are added to 34.8 kilogrammes of naphthole-disulphonate
of sodium (R salt) and 24.5 kilogrammes of 8 naphthylamine-sulphonate of sodium
are required.
3. Tolidine + a
naphthole-sulpho-acid + B naphthole-disulpho-acid R. The
tolidine acts in a quite an analogous manner to the benzidine. 21-2 kilogrammes of
tolidine, 24-6 kilogrammes of a naphthole-monosulphate of sodium and 34-8 kilo-
grammes of naphthole disulphonate of sodium (R) have to be used as in 1.
4. Tolidine a naphthole-disulpho-acid + s naphthole The naphthole-disulpho-
acid R in the example 3 can be replaced by an equivalent quantity of naphthole
namely 144 kilogrammes thereof.
5. Benzidine + sulphanilic acid + salicylic acid. 18.4 kilogrammes of benzidine
are converted with hydrochloric acid and sodium nitrite into the chloride of tetrazo-
diphenyle and mixed in presence of acetate of sodium with a solution of 19.5 kilo-
grammes of sulphanilate of sodium. A brown yellow precipitate is formed; this
precipitate acting upon an alkaline solution of salicylate of soda, a colour is
obtained which, in an alkaline soap bath dyes directly a yellow color on cotton.
G. The process in the example 5-may-also-be-reversed by acting at first-with-
chloride of tetrazodiphenyle-upon-salicylate-of-coda-and-afterwards upon-sulph-
anilate of-soda.
7. In the examples 5-and-6-the-sulphanilic acid or the calicylic acid may be
replaced by the equivalent quantities-of-amido benzoio-acid.
8. The naphthionic acid mentioned in-the-specification-No. 4410 of 1884 can be
replaced by the amido benzoic acid.
The tetrazo compounds referred to in the above examples are of the type of
tetrazodiphenyle which is expressed by the formula C₁₂ H
N
-
=
N
N
-
Portions of the hydrogen may, as is well known, be replaced by equivalent
combined radicles, for instance by methyle as in tetrazoditolyle, having the
formula
C₁₂ H₁ (CH3)2
SN
N
====
N
N
=
or in tetrazodixylile C₁₂ H (CH3)4
(N
=
-
N
N
-
N
In like manner the sulpho group may be substituted for part of the methyle as
in the sulpho-acid of tetrazodiphenyle C₁₂ H₁ (SO, H), {N=N or the sulpho-
JN N
-
acid of tetrazoditolyle, having the formula C₁₂ H₁ (CH3)2 (SO, H), N N
By employing such substitutions, the process may be farther varied, thus
9. 6. Tetrazodiphenyle sulpho acid + naphthylamine + 8 naphthylamine-
sulpho-acid. 37.2 kilogrammes of benzidine-di-sulpho-acid are converted into its
tetrazo compound by the action of 25 kilogrammes of hydrochloric acid and
13.8 kilogrammes of sodium nitrite. This tetrazo compound is then combined with
143 kilogrammes of naphthylamine dissolved in dilute hydrochloric acid, and

page_text: finally the intermediate product thus obtained is acted on upon by an alkaline solution
of 25-4 kilogrammes of g naphthylamine-mono-sulphonate of sodium.
If benzidine carbonic acid or its homologues be substituted for benzidine-
disulpho-acid, analogous colours will be obtained.
10. 7. Tolidine-disulpho-acid + a naphthylamine + 8 naphthylamine. 42 kilo-
grammes of tolidine-disulpho-acid are converted into its tetrazo-compound by the
action of hydrochloric acid and a solution of 13-8 kilogrammes of sodium nitrite.
This tetrazo-compound is then combined first with 143 kilogrammes of a naph-
thylamine in a hydrochloric solution, and, finally, the intermediate product
thus obtained and with 14.3 kilogrammes of s naphthylamine, are dissolved in bydro-
chloric acid.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
For the production of mixed azo colours, the process, substantially as herein
described, wherein the intermediate product formed by the combination of one
molecule of tetrazodiphenyle or its equivalent (such as tetrazodixylile, or tetrazo-
diphenyle sulpho acid) with one molecule of an amine, an aido-sulpho-acid,
amido-carbonic-acid, phenole or phenole-carbonic-acid, is combined with a second
molecule of another of the substances last mentioned.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, London, W.C.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, London, W.C.