Process for the Production of a Red Color on Textile Fibres.
Year: 1892

page_text: Date of Application, 5th Mar., 1892
Complete Specification Left, 5th Dec., 1892-Accepted, 14th Jan., 1893
AD STELTATION.
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS
AND, BRUNING, of Hoechst "/ Main, in the Empire of Germany, Chemical
Manufacturers.]
Process for the Production of a Red Color on Textile Fibres.
I, OLIVER IMRAY of No. 28 Southampton Buildings in the County of London
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows
Amongst the bases that are actually used in dye- and print-works for producing
red azo-colors upon naphthol grounded fibre, the principal ones are beta-naphthyl-
amine, amidoazobenzene, paranitraniline and others. But the colors obtained by
means of these bodies are, with the exception of those produced by para-nitraniline,
of a very limited degree of fastness to light and soap and the red obtained by means
of para-nitraniline is too yellowish i.e. too orange-red for most purposes.
Since the time that azo colours were first produced on the fibre it was therefore
the general desire, to find a body by means of which it should be possible to produce
a red color that, besides being fast had a blueish shade.
In making experiments in this direction my foreign correspondents discovered
that the ortho-nitro-para-phenetidin was a base which responded in every respect
the effect aimed at. The ortho-nitro-para-phenetidin N'O, CH, N'H, OC,H,
can be produced from phenacetin by heating the same with diluted nitric acid or by
nitrating it in glacial acetic acid solution. It melts at 103° to 104° C. (Groll
Inaugural dissertation Bâle, printed by Bechtold & Co. Wiesbaden 1888 p. 20).
The blue-red that can be produced by means of ortho-nitro-para-phenetidin is
not quite so fast as that obtained by means of alizarine, but as to beauty and
blueish tint of shade and also with regard to resistance against light and soap it is
much above those red shades that heretofore could be produced upon the cotton
fibre.
The discovery of it therefore constitutes a double advantage; not only has the
still vacant space in the series of red azo-colors been filled in, but at the same time
it is possible to produce in dyeing and printing a relatively fast blue-red of such.
beauty of shade as could not before be produced with any other coloring matter.
Whereas the shades, now commonly produced by means of combinations of
beta-naphthylamine or amidoazobenzene with beta-naphthole under the influence of..
hot soap solutions undergo great alterations and lose in intensity, this is not the
case with the novel red obtained by means of ortho-nitro-para-phenetidin; on the
contrary, it is improved by soaping and at the same time its resistance against the
nfluence of light, provided that it be fixed by means of turkey-red oil and
luminate of soda, is a better one than that of the shades obtained by the other two
combinations. The latter change in shade, and turn brown-red already after two-
lays exposure to light.
The method of fixing is essential for the phenetidin red to the same extent as is
he case of para-nitraniline-red. Its beauty and fastness of shade is improved by
his method.

page_text: COMPLETE SPECIFICATION.
Process for the Production of a Red Color on Textile Fibres.
I, OLIVER IMRAY, of No. 28, Southampton Buildings, 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 :—
Amongst the bases that are actually used in dye- and print works for producing
red azo-colors upon naphthol grounded fibre, the principal ones are beta-naphthyl-
amine, amidoazobenzene, paranitraniline and others. But the colours obtained by
means of these bodies are, with the exception of those produced by para-nitraniline,
of a very limited degree of fastness to light and soap, and the red obtained by
means of para-nitraniline is too yellowish i.e. too orange-red for most purposes.
Since the time when azo colours were first produced on fibre it was therefore
generally desired, to find a body by means of which it should be possible to produce
a red color that, besides being fast, should have a blueish shade.
In making experiments in this direction my foreign correspondents discovered
that the ortho-nitro-para-phenetidin was a base which fulfilled in every respect the
object aimed at. The ortho-nitro-para-phenetidin N'O, CH, N'H, OC'H can be
produced from phenacetin by heating the same with diluted nitric acid or by
nitrating it in glacial acetic acid solution. It melts at 103° to 104° C. (Groll,
Inaugural dissertation Bâle, printed by Bechtold & Co. Wiesbaden 1888, p. 20).
The blue-red that can be produced by means of ortho-nitro-para-phenetidin is
not quite so fast as that obtained by means of alizarine, but, in respect of beauty

page_text: and blueish tint and also of resistance to light and soap, it greatly excels those red
shades that heretofore could be produced upon cotton fibre.
The discovery of it therefore constitutes a double advantage, for not only has
the still vacant space in the series of red-azo colours been filled in, but also it has
been made possible to produce in dyeing and printing a relatively fast blue-red
of such beauty of tint as could not before be produced with any other coloring
matter.
Whereas the shades, now commonly produced by means of combinations of beta-
naphthylamine or amidoazobenzene with beta-naphthole under the influence of hot
soap solutions undergo great alterations and lose in intensity, this is not the case
with the novel red obtained by means of ortho-nitro-para-phenetidin ;
on the
contrary, it is improved by soaping and at the same time its resistance to the
influence of light, provided that it be fixed by means of turkey red oil and aluminate
of soda, is better than that of the shades obtained by the other two combinations,
which change in shade and turn brown red after only two days' exposure to
light.
The method of fixing is essential for the phenetidin red to the same extent as is
the case with para-nitraniline-red. Its beauty and fastness of shade is improved by
this method.
ABEL & IMRAY,
Agents for the Applicant.