Improvement in the Manufacture of Soluble Blue Cotton Dye-stuff or Colouring Matter.
Year: 1890

page_text: Date of Application, 15th Feb., 1890
Complete Specification Left, 27th Oct., 1890-Accepted, 29th Nov., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by the firm of K. OEHLER, of Offenbach/m, Grand
Duchy of Hessen, in the Empire of Germany, Manufacturer.]
Improvement in the Manufacture of Soluble Blue Cotton Dye-stuff
or Colouring Matter.
1, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
The method ordinarily adopted in the manufacture of induline consists in heating
amidoazobenzole or azophenine with aniline and hydrochlorate of aniline at a high
temperature (up to 210° C.). The result is a product which is insoluble in water,and
soluble in alcohol with difficulty and the base of which is said to have the formula Cas
H N (Berichte der deutschen chem. Gesellschaft 1883 page 1102 and 1888
page 2619).
27
I have found that this so called spirit induline is easily and completely transformed
into a soluble dye stuff by heating it to 150-200° C. with paraphenylene diamine
or paratoluylene diamine. Any other addition for instance benzoic acid is
unnecessary with this induline.
To prepare the new colouring matter I proceed as follows :-
:-
20 lbs. of spirit induline are mixed with 25 lbs. of paraphenylene diamine and
heated to 175° C. for four hours whilst stirring After cooling, the mass is,powdered
and dissolved in hot water to which as much hydrochloric acid is added as necessary
for its neutralization, the dye stuff formed is then precipitated with salt.
Another induline which is obtained by treating aniline and hydrochlorate of aniline
with nitrobenzole in presence of oxygen transmitters (as iron salts) or of arsenic
acid can be transformed in the same manner in a soluble dye stuff by heating with
paraphenyline diamine and paratoluylene diamine.
The dye stuffs thus obtained are easily soluble in water in any proportion if
completely free from salt, but a small proportion of salt is sufficient to precipitate the
dye stuff again from its watery solution. They dye cotton with greenish blue colour
by treating the dyed fibre with chromates the colour grows darker.
The dye stuffs obtained with paratoluylene diamine are a little redder than those
produced with paraphenylene diamine.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvement in the Manufacture of Soluble Blue Cotton Dye-stuff
or Colouring Matter.
I, HENRY HARRIS LAKE of the firm of Haseltine Lake & Co., Patent Agents
45 Southampton Buildings in the County of Middlesex, 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 :-
:-
The method usually adopted in the manufacture of induline consists in treating
amido- azo- benzole or azophenine with aniline and hydrochlorate of aniline at a
high temperature (up to 210° C.). The result is a product which is insoluble
in water and soluble in alcohol with difficulty and the base of which is said to have
the formula C86 H27 N, (Berichte du deutschen chemischen Gisellschaft 1883
page 1102 and 1888 page 2619).

page_text: I have found that this so-called spirit induline is easily and completely transformed
into a soluble dye-stuff by heating it to 150-200° C. with paraphenylene diamine or
paratoluylene diamine. Any other addition for instance benzoic acid is unnecessary
with this induline.
To prepare the new colouring matter I proceed as follows.
20 lbs. of spirit induline are mixed with 25 lbs. of paraphenylene diamine and
heated to 175° C. for 4 hours whilst stirring. After cooling the mass is powdered
and dissolved in hot water to which, as much hydrochloric acid is added as necessary
for its neutralization, the dye stuff formed, is then precipitated with salt.
Another induline which is obtained by treating aniline and hydrochlorate of
aniline with nitrobenzole in the presence of oxygen transmitters (as iron salts) or by
treating aniline with arsenic acid can be transformed in the same manner, in a soluble
dye stuff by heating with paraphenylene diamine and paratoluylenediamine.
The dye stuffs thus obtained are easily soluble in water in any proportion if
completely free from salt, but a small proportion of salt is sufficient to precipitate the
dye stuff again from its watery solution. They dye cotton with an indigo-blue
colour, by treating the dyed fibre with chromates the colour grows darker.
The dye stuffs obtained with paratolylenediamine are a little redder than those
produced with paraphenylenediamine.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is :-
'
First The method of producing soluble blue cotton dye stuffs by heating to a
temperature of from 150 to 200° C. the spirit induline obtained by the reaction
of aniline and hydrochlorate of aniline on amido-azobenzole or azophenine at
a temperature of 170-210° C. and the base of which is said to have the
formula C3 H27 N.
Second-The method of producing soluble blue cotton dye stuffs by heating, to a
temperature of from 150 to 200° C. the spirit induline obtained by treating aniline
or hydrochlorate of aniline with nitrobenzole in the presence of oxygen transmitters
(as iron salts) or by treating aniline with arsenic acid with paraphenylene diamine or
paratoluylene diamine.
27th day of October 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.