Manufacture of a New Coloring Matter of the Induline Series.
Year: 1889

page_text: Date of Application, 10th May, 1889
Complete Specification Left, 6th Mar., 1890-Accepted, 12th Apr., 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.]
Manufacture of a New Coloring Matter of the Induline Series.
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:-
This invention relates to the manufacture of a blue violet coloring matter, unknown
up to the present time, the hydrochlorate of which is soluble in water and has the
composition CH₁, N, H Cl. by heating a mixture of aniline, bydrochlorate of aniline
and amidoazobenzol producing compounds from which this coloring matter can be
separated in the following manner.
1. The mixture of the indulines is boiled twice or thrice with a large quantity of
water and filtered; hydrochloric acid is added to the re-united filtrates, whereby the
whole of the new coloring inatter is precipitated. This is collected on a filter, pressed
and dried at a temperature of 70° to 80° C.
2. This process for the separation is founded on the fact that of all the coloring
matters which form in the induline melt, the one mentioned above alone is capable of
forming a stable acetate. The mixture of the hydrochlorates of the indulines is mixed
with diluted soda lye for 12 to 24 hours, then the induline bases thus obtained are
collected on a filter and washed carefully with cold water. The mixture of the bases,
in a still wet state, in suspended in 100 to 150 parts of water, acetic acid is added and
the whole is boiled, when the new induline C₂ H₁, N, will dissolve. It is filtered hot
and the filtrate is evaporated to one fourth of its volume when the acetate of the
induline C, H, N. will crystallise forming blue leaflets with brown lustre. It is
collected on a filter, pressed and dried at 80° C. The acetate thus obtained is easily
soluble in cold water and is a coloring matter very valuable for dyeing and cloth
printing purposes.
Instead of acetic acid, other organic acids, such as tartaric acid, citric acid or levulic
acid may be employed giving equally good results.
Dated this 10th day of May 1889
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of a New Coloring Matter of the Induline Series.
I, 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:-
This invention relates to the manufacture of a blue violet coloring matter unknown
up to the present time, the hydrochlorate of which is soluble in hot water and has the
composition CH, NH Cl such coloring matter being obtained by heating a mixture
of 5 parts of aniline, 3.9 parts of hydrochlorate of aniline and 2 parts of amidoazo-
benzol, whereby a compound is produced wbich contains the said coloring matter and
from which it can be separated by the following means.
1. The said compound, which contains a mixture of indulines, is boiled twice or
thrice with a large quantity of water and filtered; hydrochloric acid is added to

page_text: the re-united filtrates whereby the whole of the new coloring matter is precipitated
together with other indulines in the form of hydrochlorates.
This mixture is collected on a filter, pressed and dried at a temperature of from 70°
to 80° C.
2. The process for the separation of the new coloring matter from the above men-
tioned mixture is founded on the fact that of all the coloring matters which form
in the mixture, the new coloring matter alone is capable of forming a stable
acetate. The mixture of the hydrochlorates of the indulines is for this purpose
mixed with diluted soda lye for from 12 to 24 hours; the induline bases thus
obtained are then collected on a filter and washed carefully with cold water.
The mixture of the bases, in a still wet state, is suspended in 100 to 150 parts
of water; acetic acid is added and the whole is boiled, when the new induline C, H₁, N.
will dissolve. It is filtered hot and the filtrate is evaporated to one fourth of its
volume when the acetate of the induline C, H₁, N. will crystallise, forming blue
leaflets with brown lustre. It is collected on a filter, pressed and dried at 80° C.
The acetate thus obtained is easily soluble in cold water and is a coloring matter
very valuable for dyeing and cloth printing purposes.
Instead of acetic acid, other organic acids, such as tartaric acid, citric acid or levulic
acid may be employed giving equally good results.
Instead of treating the hydrochlorates of the indulines in the first place with bases
and then with organic acids, the hydrochlorates of the indulines may be converted
directly into the salts of organic acids by boiling the same under pressure with aqueous
solutions of salts of organic acids, for example with acetate of sodium. In this case
the acetate of the base C24 H₁, N. remains in solution, and is separated in the
way described above sub. (2).
.
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 herein described manufacture of salts of the induline base which are soluble in
water.
D
1 13..
3000
ABEL & IMRAY,
Agents for the Applicant.