Year: 1887

page_text: Date of Application, 17th Jan., 1887
Complete Left, 11th Oct., 1887
Complete Accepted, 2nd Dec., 1887
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS AND
BRUNING, of Hoechst-am-Main, in the Empire of Germany, carrying on business
as Chemical Manufacturers.]
I, OLIVER IMRAY of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Fellow of the Institute of Patent Agents, do hereby declare the nature
of this invention to be as follows:-
O. Fischer and E. Nepp have shewn (Berichto of the Deutsch chem. Ges. 1886
5 P. 2991) that certain nitrosamines by treatment with alcoholic chlorhydric acid
undergo a moleculary transformation. Thus for instance from methylphenylnitros-
/C. H
amine N -C H₁, under these conditions is obtained the para-nitrosomethylaniline
NO
TT

page_text: This invention consists in the manufacture of blue or violet colouring matters by
the action of such paranitrosoderivatives of secondary amines, on phenols or
oxycarbonic acids, as in the following examples.
(1) 19 parts of chlorhydrate of para-nitrosomono-aethylaniline and 15 parts of
beta-naphtol are dissolved in about 80 parts of alcohol. This solution is heated for
some time to about 60° C., then chlorzinc is added and finally the coloring matter is
precipitated by adding water.
(2) To 5 parts of chlorhydrate of paranitrosodiphenylamine and 8 parts of gallic
acid are added 50 parts of acetic acid (of 20 per cent.). This mixture is heated on
the water bath until it assumes a blue color; the product is then poured into cold
water, and the blue colouring matter which is precipitated is filtered and washed
with water.

page_text: I, OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex, Fellow of the Institute of Patent Agents, 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:-
O. Fischer and E. Nepp have shown (Berichte of the Deutsch. chem. Ges. 1886
P. 2991) that certain nitrosamines by treatment with alcoholic chlorhydric acid
undergo a moleculary transformation. Thus for instance from methylphenylnitros-
CH,
This invention consists in the manufacture of blue or violet colouring matters by
the action of such paranitrosoderivatives of secondary amines on phenols or
oxycarbonic acids, as in the following examples.
(1) 19 parts of chlorhydrate of paranitrosomonoaethylaniline and 15 parts of
betanaphtol are dissolved in about 80 parts of alcohol. This solution is heated for
some time to about 60° C., then chlorzine is added and finally the coloring matter is
precipitated by adding water.
(2) To 5 parts of chlorhydrate of paranitrosodiphenylamine and 8 parts of gallic
acid are added 50 parts of acetic acid (of 20 per cent.). This mixture is heated on
the water bath until it assumes a blue color; the product is then poured into cold
water, and the blue coloring matter which is precipitated is filtered and washed with
water.
.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
:-
The production of colouring matters by the action of paranitrosoderivatives of -the

page_text: secondary amines that is to say; of the monomethyl- monoethyl- and monobenzyl-
derivative of aniline, orthotoluidine alpha and beta-naphthylamine, further of
diphenylamine, tolylphenylamine, ditolylamine, phenyl-alpha-naphthylamine and
phenyl-beta-naphthylamine in the presence of suitable dissolving agents upon phenol,
kresol, alpha and beta naphthol, resorcine, dioxynaphthaline, pyrogallol, mono-di and
trioxybenzoic acid and also oxynaphthoic acid.