THE PRODUCTION OF NEW Azo-COLORS
Year: 1885

page_text: This Specification was, upon the 15th day of June 1889, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
We MEINHARD HOFFMANN D.Ph. and ARTHUR WEINBERG D.Ph. both of
Mainkur near Frankfort on Main in the Empire of Germany do hereby declare
the nature of our invention for "THE PRODUCTION OF NEW Azo-COLORS " to be
as follows:-
This Invention has for its object the production of new Azo-colors.
Alpha Naphtylamine acting upon diazo-sulfo acids forms bodies which as we'
have discovered may be converted into Diazoazo compounds and coloring matters
may be obtained by the action of equal molecules of the said Diazoazo compounds
upon Naphtols or Naphtolsulphonic acids in alkaline solution.
In order to carry out our invention we dissolve for instance 35 kilos of Alpha
Naphtylamine disulphonate of Sodium in 300) litres of water acidulated with
30 kilos of Muriatic acid (21° Bé) and diazotise by addition of 7 kilos of Nitrite
of Sodium in aqueous solution at low temperature. Then 18 kilos of Chlor hydrate
of Alpha Naphtylamine dissolved in 500 litres of water are poured into the above
mixture whilst constantly stirring A dark violet color results which separates
immediately-After 12 hours we add 12 kilos Muriatic acid and 7 kilos Nitrite of
Sodium-The Diazoazo compound which is formed is allowed to act upon a solution
of 36 kilos of Beta Naphtol Alpha Disulphonate of Sodium kept alkaline by
addition of 20 kilos of Ammonia of 25%-The coloring matter immediately
formed separates completely on the addition of common salt-It is then filtered
and dried.
Instead of Alpha Naphtyalamine disulphonic acid which we get by sulphurating
naphtionic acid with Oil of Vitriol we may take any other Sulphonic acid of
Naphtyalamine, Alpha or Beta, or the Sulphonic acids of Amido-benzol, Amido-
toluol, and Amido-xylol.
Instead of Beta Naphtol Alpha disulphonic acid we may substitute Alpha or
Beta Naphtol or their Mono and Disulphonic acids.
Instead of Naphtyalamine we may employ its homologues.
The shades of these combinations vary from dark reddish-violet to dark blue.
Dated this 31st day of July 1885
DR MEINHARD HOFFMANN.
DR ARTHUR WEINBERG.
Carpmael & Co.,
Agents for the Applicants.

page_text: We MEINHARD HOFFMANN D.Ph. and ARTHUR WEINBERG D.Ph. both of
Mainkur near Frankfort on Main in the Empire of Germany 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 :-
This invention has for its object the production of new azo-colors.
Alphanaphylamine acting upon diazosulpho acids forms bodies, which, as we
have discovered, may be converted into. dinzoazo compounds, and coloring matters
may be obtained by the action of equal molecules of the said diazoazo compounds
upon naphtols or naphtolsulphonic acids in alkaline solution.
In order to carry out our invention we dissolve for instance 35 kilos alpha-
naphtylamine-disulphonate of sodium in 300 litres of water acidulated with 80 kilos
of muriatic acid (21° Bé.) and diazotise by addition of 7 kilos nitrite of sodium in
aqueous solution at low temperature. Then 18 kilos of chlorhydrate of alpha-
naphtylamine dissolved in 500 litres of water are poured into the above mixture
under constant stirring. A dark violet color results, which separates inmediately.
After 12 hours we add 12 kilos muriatic acid and 7 kilos nitrite of sodiuin.
The diazoazo compound which is formed is allowed to act upon a solution
of 36 kilos of ẞ naphtolalphadisulphonate of sodium kept alkáline by addition
of 20 kilos of ammonia of 25%.
The coloring matter immediately formed, separates completely by the addition
of common salt.
It is then filtered and dried.
In the above described process instead of alphanaphty laminodisulphonic acid we
may take other beta or alpha naphtylaminesulphonic acids (with exception of Piria's
naphtionie neid which is found to be unsuitable) or the sulphonic acids of amido
benzol, amidotoluol and amidoxylol. To the use of Piria's "naphtionic acid and to
other Amido-mono-sulphonic acids we make no claim.
Instead of beta naphtolalphadisulphonic acid we may substitute the other mono
and disulphonic acids of the naphtols, or the naphtols themselves.
The shades of these combinations vary from reddish violet to dark blue.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is :—
1. The production of coloring matters by the reaction substantially as described
of diazoic derivatives of compounds obtained from alphanaphtylamine and the
above named diazosulphonic acids upon naphtolsulphonic acids or the naphtols.
2. The new coloring matters above described.
Dated this 3rd day of April 1886.
CARPMAEL & Co.,
Agents for the Applicants.

page_text: We MEINHARD HOFFMANN D. Ph. and ARTHUR WEINBERG D.Ph. both of
Mainkur near Frankfort on Main in the Empire of Germany do hereby declare
the nature of our invention for "THE PRODUCTION OF NEW AZO-COLORS"
as follows:-
This Invention has for its object the production of new Azo-colors.
to be
Alpha Naphtylamine acting upon diazo-sulfo acids forms bodies which as we
have discovered may be converted into Diazoazo compounds and coloring matters
may be obtained by the action of equal molecules of the said Diazoazo compounds
upon Naphtols or Naphtolsulphonic.acids in alkaline solution.
In order to carry out our invention we dissolve for iustance 35 kilos of Alpha
Naphtylamine disulphonate of Sodium in 300 litres of water acidulated with
30 kilos of Muriatic acid (21° Bé) and diazotise by addition of 7 kilos of Nitrite
of Sodium in aqueous solution at low temperature. Then 18 kilos of Chlor hydrate
of Alpha Naphtylamine dissolved in 500 litres of water are poured into the above
mixture whilst constantly stirring-A dark violet color results which separates
immediately After 12 hours we, add 12 kilos Muriatic acid and 7 kilos Nitrite of
Sodium The Diazoazo compound which is formed is allowed to act upon a solution
of 86 kilos of Beta Naphtol Alpha Disulphonate of Sodium kept alkaline by
addition of 20 kilos of Ammonia of 25 %-The coloring matter immediately
formed separates completely on the addition of common salt-It is then filtered
and dried.
Instead of Alpha Naphtyalamine disulphonic acid which we get by sulphurating
naphtionic acid with Oil of Vitriol we may take any other Sulphonic acid of
Naphtyalamine, Alpha or Beta, or the Sulphonic acids of Amido-benzol, Amido-
toluol, and Amido-xylol.
:
Instead of Beta Naphtol Alpha disulphonic acid we may substitute Alphą or
Beta Naphtol or their Mono and Disulphonic acids.
Instead of Naphtyalamine we may employ its homologues.
The shades of these combinations vary from dark reddish-violet to dark blue…….

page_text: We MEINHARD HOFFMANN D.Ph. and ARTHUR WEINBERG D.Ph. both of
Mainkur near Frankfort on Main in the Empire of Germany 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 :—
This invention has for its object the production of new azo-colors.
Alphanaphtylamine acting upon diazosulpho acids forms bodies, which, as we
have discovered, may be converted into diazoazo compounds, and coloring matters
may be obtained by the action of equal molecules of the said diazoazo compounds
upon naphtols or naphtolsulphonic acids in alkaline solution.
In order to carry out our invention we dissolve for instance 35 kilos alpha-
naphtylamine-disulphonate of sodium in 300 litres of water acidulated with 30 kilos
of muriatic acid (21° Bé.) and diazotise by addition of 7 kilos nitrite of sodium in
aqueous solution at low temperature. Then 18 kilos of chlorhydrate of alpha-
naphtylamine dissolved in 500 litres of water are poured into the above mixture
under constant stirring. A dark violet color results, which separates immediately.
After 12 hours we add 12 kilos muriatic acid and 7 kilos nitrite of sodium.
The diazoazo compound which is formed is allowed to act upon a solution
of 36 kilos of B naphtolalphadisulphonate of sodium kept alkaline by addition
of 20 kilos of ammonia of 25 %
The coloring matter immediately formed, separates completely by the addition
of common salt.
It is then filtered and dried.
In the above described process instead of alphanaphtylaminedisulphonic acid we
may take other beta or alpha naphtylaminesulphonic acids (with exception of Piria's
naphtionic acid which is found to be unsuitable) or the sulphonic acids of amido-
benzol, amidotoluol and amidoxylol.
Instead of beta naphtolalphadisulphonic acid we may substitute the other mono
and disulphonic acids of the naphtols, or the naphtols themselves.
The shades of these combinations vary from reddish violet to dark blue.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is :-
1. The production of coloring matters by the reaction substantially as described
of diazoic derivatives of compounds obtained from alphanaphtylamine and the
above named diazosulphonic acids upon naphtolaulphonic acids or the naphtols.
2. The new coloring matters above described.
Dated this 3rd day of April 1886.