Manufacture of Indulin-like Colouring Matters.
Year: 1889

page_text: Date of Application, 30th Oct., 1889
Complete Specification Left, 9th July, 1890-Accepted, 13th Sept., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBWERKE GRIESHEIM-ON-MAIN
WITHELM NOETZEL & Co., of Griesheim-on-Main, Germany.]
Manufacture of Indulin-like Colouring Matters.
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 to be as follows:-
It has been discovered by my correspondents that in the reaction of hydrochlorate
of nitrosodimethylanilin and hydrochlorate of nitrosodiethylanilin upon primary
aromatic amines, amidoazo-benzol, amido-azotoluol or amidoazo-xylol, in the presence
of hydrochloric acid and at a temperature ranging between 90° Cent. to 150° Cent., a
ready formation of coloring matter takes place. Such products of the reaction of the
above named bodies in the presence of hydrochloric acid, and at a temperature of
from 90° to 150° Cent. have not hitherto been known.
If 30 parts of anilin be heated in an oil bath to a temperature of 90° Cent: together
with 15 parts of hydrochloric acid of 20° Be., and there be then added under continual
stirring 25 parts of hydrochlorate of nitrosodimethylanilin, the formation of coloring
matter will ensue under violent reaction and production of steam. After completion
of the reaction, the mass is heated for some time to 120° Cent. whereupon it thickens
and becomes solid on cooling.
The melt is reduced to powder and is entirely dissolved in water containing hydro-
chloric acid. The separation of the coloring matter is effected by the addition of
common salt and its purification by filtering and repeated dissolution.
The coloring matter is of a dark brown tint, and easily dissolves in hot water with
a blue-red color. It dyes mordanted cotton a washable grey-blue.
By varying the temperature and the quantity of the hydrochloric acid, red-violet,
red-blue to grey-black colors can be obtained.
Dated this 30th day of October 1889
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of Indulin-like Colouring Matters.
I, OLIVER IMRAY, of No. 28 Southampton Buidings, 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:-
It has been discovered by my correspondents that in the reaction of hydrochlorate
of nitrosodimethylanilin and hydrochlorate of nitrosodiethylanilin upon primary
aromatic amines, amidoazo-benzol, amidoazotoluol or amidoazo-xylol, in 'the presence
of hydrochloric acid and at a temperature ranging between. 90° Cent. to 150° Cent., a
ready formation of coloring matter takes place. Such products of the reaction of the
above named bodies in the presence of bydrochloric acid, and at a temperature of
from 90° to 150° Cent. have not hitherto been known.

page_text: If 30 parts of anilin be heated in an oil bath to a temperature of 90° Cent. together
with 15 parts of hydrochloric acid of 20° Bé., and there be then added under continual
stirring 25 parts of hydrochlorate of nitrosodimethylanilin, the formation of coloring
matter will ensue under violent re-action and production of steam. After completion
of the re-action, the mass is heated for some time to 120° Cent. whereupon it thickens
and becomes solid on cooling.
The melt is reduced to powder and is entirely dissolved in water.containing hydro-
chloric acid. The separation of the coloring matter is effected by the addition of
common salt and its purification by filtering and repeated dissolution.
The coloring matter is of a dark brown tint, and easily dissolves in hot water with
a blue red color. It dyes mordanted cotton a washable grey blue.
By varying the temperature and the quantity of the hydrochloric acid, red violet,
red blue to grey black colors can be obtained.
For example At a temperature of 90° to 110° C. and using the quantity of hydro-
chloric acid as mentioned before, red violet colors can be obtained.
At 110° to 120° C. and with an additional quantity of half the original weight of
hydrochloric acid red blue colours result.
And at about 150° C. and doubling the quantity of hydrochloric acid, and leaving it
to act for about 5 hours, grey black colors will be obtained.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is
The manufacture of colouring matters by reacting with the hydrochlorates of nitroso-
dimethylaniline and nitrosodiethylaniline upon primary aromatic amines or upon
amidoazobenzol, amidoazotoluol or amido-azo-xylol, substantially as described.
Datad this Ark dan T... 1000
ABEL & IMRAY,
Agents for the Applicant.