IMPROVEMENTS IN THE MANUFACTURE OF BETANAPHTHYLAMINE AND BETANAPHTHYLANILINE, OR OTHER SUBSTITUTED DERIVATIVES OF THE FORMER, AND IN THE PREPARATION OF COLOURING MATTER THEREFROM
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Charles Denton Abel at the Office
of the Commissioners of Patents on the 21st June 1880. A communication
from abroad by Eduard Oehler, of the Firm of K. Ochler, of Offenbach on the
Maino, in the German Empire,
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane,
in the County of Middlesex. "IMPROVEMENTS IN THE MANUFACTURE OF
BETANAPHTHYLAMINE AND BETANAPHTHYLANILINE, OR OTHER SUBSTITUTED
DERIVATIVES OF THE FORMER, AND IN THE PREPARATION OF COLOURING MATTER
THEREFROM." [A communication from abroad by Eduard Oehler, of the Firm
of K. Oehlor, of Offenbach on the Maine, in the German Empire.]
According to one part of this Invention betanaphthol or its substituted
derivatives or combinations of these bodies with metallic oxides or mixtures
thereof are heated for a considerable time at a high temperaturo, together with
salts of ammonia, or of substituted ammonias, either alone or with addition of
neutral bodies, and the bases thus produced are separated by any suitable known
means from the substances that do not enter into the reaction, or from impurities
produced.
1. Preparation of botanaphthylamine:-
10 parts betanaphtholsodium are heated together with 4 parts of salammoniac
in a digester for 24 hours to about 200° cent., the betanaphthol not acted upon is
removed from the cooled pulverised mass by means of soda lye, and from the
residue the betanaphthylamine produced is extracted by means of hydrochloric
acid, and is precipitated from the solution by means of soda lye.
2. Preparation of betanaphthylaniline :-
11 parts of naphthol are heated for 12 hours at a temperature of about 180° C.,
together with 10 parts of hydrochlorate of aniline in an open vessel, with provision
of means for collecting the sublimated betanaphthol, and for leading off the escaping
hydrochloric acid. The hydrochlorate of aniline and the naphthol not acted upon
are removed from the cooled mass respectively by means of water and by soda lyo,
and the remaining naphthylaniline is purified by dry distillation.
I do not limit myself to the above examples, nor to the proportions, tempe-
ratures, and time given, as these may be variously modified according to
circumstances.

page_text: According to another part of this Invention the known process for the pre-
paration of the diazo colours by the combination of diazotised amides with
betanaphthol and its sulpho acids is applied to betanaphthylamine and its sulpho
acids in place of the amides at present employed, that is to say, betanaphthylamine
or its sulpho acids are diazotised in the usual manner, and the diazocompounds
produced are combined with the botanaphthol or its sulpho acids. The colouring
matters produced by this means are then either directly employed or previously
sulphurised in tho known manner.
The above mentioned hitherto unknown betanaphthylamine sulpho acids are
prepared from betanaphthylamine by the action thereon of the known sulphurising
substances.
According to the proportions, temperature, and duration of the action easily or
not readily soluble acids are obtained. Thus, by way of example, one part of
betanaphthylamine is heated together with two parts of fuming sulphuric acid of
20 per cent. anhydride in a water bath until a sample dissolves perfectly in soda
lye. From the cooled mass the acid is then simply separated by dilution with
water, and it need then only be washed.
In preparing the diazo colours I employ the following combinations of the above
named bodies:-
.1. Beta diazonaphthaline and beta
naphtholmonosulpho acid
-
2. Beta diazonaphthaline and beta
naphthol bisulpho acid
} C, H, N=NC, H, (SO, NË) OH.
} C, H, N=NC, H. (SO, NË) 2 OH.
3. Beta diazonaphthaline, sulpho C, B. (SO; N₁) N=NC, H, OH.
acid, and beta naphthol
4. Beta diazonaphthaline, sulpho-
acid, and beta naphtholmo- C₁, H, (SO, N₁) N=NC H₂ (SO; N) OH.
nosulpho acid
-
5. Beta diazonaphthaline, sulpho-
10
acid, and beta naphthol bi- C₁, H. (SO, Na) N=NC₁ H¸ (SO̟ Na) 2 OH.
sulpho-acid
Examples. 1. Colouring matter from beta diazo napthaline and beta napthol
bisulpho acid.
10 parts of betanaphthylamine are dissolved in 150 parts of water and 20 parts
of hydrochloric acid and mixed with 475 parts of sodium nitrite. The beta diazo-
naphthaline produced is then mixed with a solution of 25 parts of naphthol-
bisulphate of soda to be maintained alkaline, and the colouring matter produced is
precipitated by common salt.
"
2. Colouring matters from beta diazonaphthalin, sulpho-acid, and beta naphthol-
bisulpho-acid. 10 parts of betanaphthylamine sulpho-acid are dissolved in 50) parts
of soda lye of 4 per cent. The solution is precipitated by sulphuric acid, and
diazotised with 35 parts of sodium nitrite. The beta diazonaphthalinsulpho acid
produced is then added to a solution of 17 parts of naphthol bisulphate of soda,
which must be maintained alkaline, and the colouring matter produced is precipi-
tated by common salt.