New Manufacture of Bases and of Colouring Matters therefrom.
Year: 1892

page_text: Date of Application, 8th Feb., 1892
Complete Specification Left, 24th Oct., 1892-Accepted, 3rd Dec., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE ACTIEN GESELLSCHAFT FÜR ANILIN
FABRIKATION, of Berlin, in the Empire of Germany, Manufacturing
Chemists.]
New Manufacture of Bases and of Colouring Matters therefrom.
I, CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery
Lane, in the County of London, Chartered Patent Agent, do hereby declare the
nature of this invention to be as follows:
be
My foreign correspondents have discovered, that new diamido-bases may
obtained by reacting with p-nitrodiazobenzene upon the a-amido-ẞ-naphtholethers
and afterwards reducing the nitroamidoazo compounds thus obtained by means of
alkali-sulphides.
The constitution of these new bases is expressed by the general formula.
II.
My foreign correspondents have further discovered, that the tetrazo-compounds
of the aforesaid new bases yield valuable colouring-matters, when combined with
the sulpho acids of the following products.
u and ẞ naphthol
a and 3 naphthylamine
amidonaphthols and dioxynaphthalenes.
In order to prepare these colours, one molecule of the hydrochloride of the afore-
mentioned diamido bases is diazotised by means of two molecules of nitrite, the
resulting tetrazo compound is caused to react upon two molecules of the said sulpho
acids, the combination being performed, according as to the nature of these sulpho
compounds either in alkaline solution or in the presence of acetic acid.
The colouring matters obtained in this way dye unmordanted cotton in an
alkaline or neutral bath containing common salt or Glauber's salt; they may also
be fixed on wool in a dye bath containing salt.

page_text: The shades obtained are of remarkable intensity and vary from violet-blue to
blue-black.
]
↑ . 1.
1000
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
New Manufacture of Bases and of Colouring Matters therefrom.
I, CHARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane,
in the County of London, Chartered Patent Agent, 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 :-
My foreign correspondents have discovered that new diamido-bases may be
obtained by reacting with p-nitrodiazobenzene upon the a-amido-ẞ naphtholethers
and afterwards reducing the nitroamidoazo compounds thus obtained by means of
alkali-sulphides.
The constitution of these new bases is expressed by the general formula.
II.
My foreign correspondents have further discovered, that the tetrazo-compounds
of the aforesaid new bases yield valuable colouring-matters, when combined with
the sulpho-acids of the following products.
a and ẞ naphthol
a and ẞ naphthylamine
amidonaphthols and dioxynaphthalenes.
In order to prepare these colours, one molecule of the hydrochlorate of the afore-
mentioned diamido bases is diazotised by means of two molecules of nitrite, the
resulting tetrazo compound is caused to react upon two molecules of the said
sulpho acids, the combination being performed, according to the nature of these
sulpho compounds either in alkaline solution or in the presence of acetic acid.
The colouring matters obtained in this way dye unmordanted cotton in an
alkaline or neutral bath containing common salt or Glauber salt; they may also be
fixed on wool in a dye bath containing salt.

page_text: The shades obtained are of remarkble intensity and vary from violet-blue to.
blue-black.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. The manufacture of diamido bases by first combining one molecule of
p-nitrodiazobenzene with one molecule of a amido-3 naphthol-ether and afterwards
reducing the resulting nitroazo amido compound by means of alkali-sulphides.
2. The manufacture of colouring matters by combining one molecule of the
tetrazo-compound of the p-amido benzene-azo-a amido-ẞ naphthol ethers, obtained
as set forth in the preceding claim, with two molecules of the sulpho acids of a or
ẞ naphthol, of a or ẞ naphthylamine, of the amidonaphthols or the dioxy-.
naphthalines.
3. The diamido bases manufactured as set forth in the first claim.
4. The colouring matters manufactured as set forth in the second claim.
Dated this 20th day of October 1892
ABEL & IMRAY,
Agents for the Applicant.