Year: 1897

page_text: Date of Application, 18th Sept., 1897
Complete Specification Left, 18th June, 1898-Accepted, 13th Aug., 1898
I, OLIVER IMRAY, 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: -
Bayer and Kegel (Moniteur scientif. 1886 p. 984-5) obtained a blue dyestuff
insoluble in water by the action of the diazo compounds of phenosafranine and its
homologues upon 8-naphthylamine in molecular proportions.
My foreign correspondents have found that a valuable blue to blue-green dyestuff,
soluble in water, may be obtained by the action of the diazo compounds of
asymmetric-dialkyl-phenosafranine and its homologues upon molecular quantities of
B-naphthylamine.
The following is an example:-
8 kilos. of diethylphenosafranine (obtained in the usual way by oxidation of a
mixture of 1 molecule of p-amido-diethylaniline and 2 molecules of aniline) are
dissolved in 500 litres of water and ḍiazotised with 8 kilos. of hydrochloric acid
(33 per cent.) and 1.4 kilos. of sodium nitrite; the blue diazo solution is run into a
solution of 2.8 kilos. of B-naphthylamine in 2.3 kilos. of hydrochloric acid (33 per
cent.) and 250 litres of water. After some hours the dyestuff thus formed is preci-
pitated with common salt, filtered, pressed and dried.
The new dyestuff dyes unmordanted cotton and cotton, mordanted with tannin and
tartar emetic, blue green.
A series of similar dyestuffs may be obtained if, in the above example, for the
asymmetric-diethylphenosafranine be substituted asymmetric dimethylphenosafranine
and the homologues of the said two safranines, in particular by the following:-
asymmetric-dimethyl-tolusafranine
asymmetric diethyl-tolusafranine
from 1 mol. p-amidodimethylaniline +
دو
o-toluidine
p-amidodiethylaniline +
o-toluidine
p-amidodimethylaniline +
2
"
from 1
"
2
asymmetric dimethylpheno-tolusafranine from 1
"
1
aniline 1 mol. o-toluidine
"
or 1
"
1
"
or 1
"
1
"
p-amidodimethylaniline +
aniline 1 mol. p-toluidine
p-amidodimethylaniline +
o-toluidine +1 mol. p-tolui-
dine

page_text: asymmetric-diethylpheno-tolusafranine from 1 mol. p-amidodiethylaniline +
or 1
1
"
aniline 1 mol, o-toluidine
n-amidodiethylaniline +
asymmetric-diethylpheno-tolusafranine- from 1 mol. p-amidodiethylaniline +
or 1
or 1
t
وو
"
1
"
aniline 1 mol, o-toluidine
p-amidodiethylaniline +
aniline 1 mol. p-toluidine
p-amidodiethylaniline +
o-toluidine I mol. p-tolui-
dine
COMPLETE SPECIFICATION...
Manufacture of Blue to Green Dyestuffs soluble in Water.
I, OLIVER IMRAY, of Birkbeck Bank Chambers (but formerly of No. 28,
Southampton Buildings), Chancery Lane, in the County of London, Chartered Patent
Agent, do hereby declare the nature of this invention (as communicated to me
from abroad by The Farbwerke vormals: Meister Lucius & Brüning, of Hoechst
a/Main, in the Empire of Germany, Chemical Manufacturers,) and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Bayer and Kegel (Moniteur scientif. 1886 p. 984-5) obtained a blue dyestuff
insoluble in water by the action of the diazo-compounds of phenosafranine and its
homologues upon B-naphthylamine in molecular proportions.
My foreign correspondents have found that a valuable blue to blue-green dyestuff,
soluble in water, may be obtained by the action of the diazo-compounds of asymmetric-
dialkyl-phenosafranine and its homologues upon molecular quantities of B-naphthyl-
amine. The following is an example:
8. kilos. of diethylphenosafranine (obtained in the usual. way by oxidation of a
mixture of 1 molecule of p-amido-diethylaniline and 2 molecules of aniline) are
dissolved in 500 litres of water and diazotised. with 8 kilos. of hydrochloric acid
(33 per cent.) and 1.4 kilos. of sodium nitrite'; the blue diazo-solution is run into a
solution of 2.8 kilos. of 8-naphthylamine in 2.3 kilos. of hydrochloric acid (33 per
cent. strength) and 250 litres of water. After some hours the dyestuff thus formed
is precipitated with common salt, filtered, pressed and dried.
4
The new dyestuff dyes unmordanted cotton and cotton mordanted with tannin and
tartar emetic, blue green.
A series of similar dyestuffs may be obtained if, in the above example, for the
asymmetric-diethylphenosafranine be substituted asymmetric dimethylphenosafranine
and the homologues of the said two safranines, in particular the following:-
asymmetric dimethyltolusafranine
asymmetric diethyl-tolusafranine
from 1 mol. p-amidodimethylaniline +
و"
"
from 1
2
"
asymmetric dimethyl pheno-tolusafranine from 1
:
1
or 1
"
"
1
"
or ]
"
"
o-toluidine;
p-amidodiethylaniline +
o-toluidinė
Pamidodimethylaniline +
1 mol. aniline + 1 mol. o-tol-
uidine
p-amidodimethylaniline +
aniline +1 mol. p-toluidine
p-amidodimethylaniline +
o-toluidine +1 mol-p-tolui-
dine:

page_text: وو
T
o-toluidine + 1 mol. p-tolui-
dine
or mixtures of these bodies.
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 herein described manufacture of blue to bluish-green dyestuffs soluble in
water, by causing the diazo-compounds of the asymmetric dialkylsafranines to react
with B-naphthylamine in molecular proportions.
2. The blue to bluish-green dyestuffs soluble in water manufactured as above set
forth.