Manufacture of Blue Basic Sairanine A20-dyestus.
Year: 1897

page_text: Manufacture of Blue Basic Sairanine A20-dyestus.
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 (as communicated to me from abroad by The Farb werke vormals:
Meister Lucius and Brüning, of Hoechst a/Main, in the Empire of Germany,
Chemical Manufacturers) to be as follows:-
By the action of the diazo compounds of pheno safranine and its homologues
upon alpha-naphthylamine in molecular proportions Bayer & Kegel (Moniteur
scientif. 1886 p. 984-5) obtained reddish blue dyestuffs, which, however, were not
characterised by good tinctorial properties, and consequently did not find their
way into the colour-industry.
My foreign correspondents have found that, by the action of the diazo compounds
of asymmetric dialkyl phenosafranines and their homologues upon alpha-
naphthylamine, valuable basic dyestuffs may be obtained which dyo mordanted and
unmordanted vegetable, as well as animal fibres, pure blue tints.
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 + 2 molecules of aniline) are
dissolved in 500 litres of water and diazotised with 8 kilos. of hydrochloric acid of
33 per cent., and 1.4 kilos. of sodium pitrite; the blue diazo solution is run into a
solution of 2.8 kilos. of alpha-naphthylamine in 2-3 kilos. of hydrochloric acid
After some
(or the equivalent quantity of another acid) and 250 litres of water.
hours the dyestuff thus formed is precipitated with common salt, filtered, pressed
and dried.
A series of similar dyestuffs may be obtained, if in the above example, for the
asymmetric diethylphenosafranine be substituted equivalent quantities of
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-amidodimethyl aniline +
"
رو
دو
2
from 1
2
asymmetric dimethylpheno-tolusafranine from 1
1
"3
"
1
or 1
or 1
1
"
وو
"
"
o-toluidine
p-amidodiethyl aniline +
o-toluidine
p-amidodimethyl aniline +
aniline 1 mol. o-toluidine
p-amidodimethyl aniline +
aniline +1 mol. p-toluidine
p-amidodimethyl aniline +
o-toluidine + 1 mol. p-tolui-
dine

page_text: asymmetric diethyl-pheno-tolusafranine from 1 mol. p-amidodiethyl aniline +
1
or 1
1
or 1
وو
"
37
"
'1
"
aniline 1 mol. o-toluidine
p-amidodiethylaniline +
aniline 1 mol. p-toluidine
p-amidodiethylaniline +
o-toluidine +1 mol. p-tolui-
dine
COMPLETE SPECIFICATION.
Manufacture of Blue Basic Safranine Azo-dyestuffs.
I, OLIVER IMRAY, formerly of No. 28, Southampton Buildings, but now of Birkbeck
Bank Chambers, 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
and 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 :-
By the action of the diazo-compounds of pheno safranine and its homologues
upon alpha-naphthylamine in molecular proportions Bayer & Kegel (Moniteur
scientif. 1886 p. 984-5) obtained reddish blue dyestuffs, which, however were not
characterised by good tinctorial properties, and consequently did not find their
way into the colour industry.
My foreign correspondents have found that, by the action of the diazo compounds
of asymmetric dialkyl phenosafranines and their homologues upon alpha-
naphthylamine, valuable basic dyestuffs may be obtained which dye mordanted and
unmordanted vegetable, as well as animal fibres, pure blue tints.
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 + 2 molecules of aniline) are
dissolved in 500 litres of water and' diazotised with 8 kilos. of hydrochloric acid of
33 per cent., and 1.4 kilos. of sodium nitrite; the blue diazo-solution is run into a
solution of 2.8 kilos. of alpha-naphthylamine in 2.3 kilos. of hydrochloric acid
of 33 per cent. strength (or the equivalent quantity of another acid) and 250 litres
of water. After some hours the dyestuff thus formed is precipitated with common
salt, filtered, pressed and dried.
A series of similar dyestuffs may be obtained, if in the above example, for the
asymmetric diethylphenosafranine be substituted equivalent quantities of
asymmetric dimethylphenosafranine and the homologues of the said two
safranines, in particular by the following:-
:-

page_text: asymmetric dimethyl pheno-tolusafranine from 1
1
or 1
or 1
asymmetric diethyl-pheno-tolusafranine from 1
ور
دو
"
1
در
رو
p-amidodimethylaniline +
o-toluidine +1 mol. aniline +
p-amidodimethylaniline +
aniline 1 mol. p-toluidine
"
"
1
"
or 1
>:
1
or 1
1
ور
"
رو
p-amidodimethylaniline +
o-toluidine + mol. p-tolui-
dine
p-amidodiethylaniline +
aniline 1 mol. o-toluidine
p-amidodiethylaniline +
aniline + 1 mol. p-toluidine
p-amidodiethyl aniline +
o-toluidine +1 mol. p-tolui-
dine
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 :-
with
1. The herein described manufacture of blue basic colouring matters by causing
the diazo-compounds of the asymmetric dialkylsafranines to react
a-naphthylamine in molecular proportions.
2. The blue basic safranine azo-dyestuffs manufactured as above set forth.