Improved Manufacture of Colouring Matter of the Induline Series Soluble in Water.
Year: 1890

page_text: Date of Application, 31st Jan., 1890
Complete Specification Left, 24th Oct., 1890-Accepted, 29th Nov., 1890
PROVISIONAL SPECIFICATION.
[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.j
Improved Manufacture of Colouring Matter of the Induline Series
Soluble in Water.
1, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of London, Fellow of the Institute of Patent Agents, do hereby declare the nature of
this invention to be as follows:-
By heating a mixture of aniline, hydrochlorate of aniline and of amidoazobenzol
there is produced an induline which is a mixture of coloring matters and from
which my correspondents have isolated :
1. An induline C2, H1, N. (H CI) the base of which forms with organic acids stable
salts soluble in water.
2. An induline soluble in spirit the base of which does not form salts with organic
acids.
18
By heating the induline C, H,, N. H Cl, mentioned under 1, with aromatic meta-
and para- diamines there are produced coloring matters of the induline series soluble
in water, as described in Letters Patent No. 16325 of 1888.
My foreign correspondents have since discovered that also the coloring matter
soluble in spirit of the crude induline, mentioned under 2 and which does not form
stable salts soluble in water with organic acids, furnishes very valuable coloring
matters of the induline series soluble in water on being heated with aromatic diamines,
notably with paraphenylendiamine.
EXAMPLE.
100 parts by weight of the induline soluble in alcohol, 150 parts by weight of
paraphenylendiamine, 30 parts by weight chlorhydrate of paraphenylendiamine are
heated to 180° Centigrade in an enamelled vessel, furnished with a stirrer, as long as
a sample dissolved in diluted hydrochloric acid takes a still bluer coloring; the
melt will generally require about 3 hours for completion.
From the reaction-product the part of paraphenylendiamine not used up is extracted
by boiling with water. The residue is then dissolved in 2000 parts by weight of
water and 70 parts by weight hydrochloric acid of 30 per cent. at elevated tempera-
ture, the solution is filtered and the coloring matter precipitated by means of common
salt.
The coloring matter dyes mordanted and non-mordanted cotton blue tints.
Similar coloring matters can be obtained by substituting other aromatic diamines
for the paraphenylendiamine.
Dad thin 21 J... & Tamm1000
COMPLETE SPECIFICATION.
Improved Manufacture of Colouring Matter of the Induline Series
Soluble in Water.
1, OLIVER IMRAY of No. 28 Southampton Buildings, Chancery Lane in the County
of London, 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 :-
By heating a mixture of aniline, hydrochlorate of aniline and of amidoazobenzol

page_text: there is produced an "induline" which is a mixture of colouring matters and from
which my correspondents have isolated:
1. An induline soluble C, H₁, N (H CI) the base of which forms with organic
acids stable salts soluble in water.
2. An induline soluble in spirit the base of which does not form salts with organic
acids.
By heating the induline C, H₁, N, H Cl. mentioned under 1 with aromatic meta-
and para- diamines there are produced coloring matters of the induline series soluble
in water, as described in Letters Patent No. 16325 of 1888.
My foreign correspondents have since discovered that also the colouring inatter
soluble in spirit of the crude induline, (mentioned under 2) and which does not form
stable salts soluble in water with organic acids, furnishes very valuable coloring
matters of the induline series soluble in water on being heated with aromatic diamines,
notably with para-phenylenediamine.
EXAMPLE.
100 parts by weight of the induline soluble in alcohol.
150 parts by weight of paraphenylenediamine.
30 parts by weight of hydrochlorate of paraphenylenediamine are heated to
180° Cent. in an enamelled vessel furnished with a stirrer as long as a sample
dissolved in diluted hydrochloric acid takes a still bluer coloring; the action will
generally require about 3 hours for completion.
From the reaction-product the portion of paraphenylenediamine not used up is
extracted by boiling with water. The residue is then dissolved in 2000 parts by weight
of water and 70 parts by weight of hydrochloric acid of 30 per cent. at elevated
temperature, the solution is filtered and the coloring matter is precipitated by means
of common salt.
The coloring matter dyes mordanted and non-mordanted cotton blue tints.
Similar coloring matters can be obtained by substituting other aromatic diamines
for the paraphenylenediamines.
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 :-
:-
The manufacture of coloring matters of the induline series, soluble in water, by
heating with aromatic meta- or para-diamines the induline soluble in spirit H which in
the production of the induline C₁ H₁ N, is formed conjointly therewith.
Dated this 24th day of October 1890.
ABEL & IMRAY,
Agents for the Applicant.