Matters or Dyestus.
Year: 1887

page_text: Matters or Dyestus.
I, OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex, Fellow of the Institute of Patent Agents do hereby declare the nature
of this invention to be as follows
This invention is founded on the fact that the nitrated diazo-compounds combine
with certain oxycarbonic acids forming azo-colouring-matters, which, like the alizarine
colouring matters, can be fixed on metallic mordants.
Of the oxycarbonic acids, the best suited for this purpose are salicylic acid and
alpha-oxynaphthoic acid.
These acids form especially useful coloring matters with the diazo-compounds
deriving from metanitraniline, paranitraniline, the isomeric nitrotoluidines, nitroxyli-
dines, their sulpho-acids and similar compounds.
EXAMPLE I.
10 parts of metanitraniline are dissolved in 40 parts of hydrochloric acid (20° Bé)
and 150 parts of water, and, while the solution is cooling, there are carefully added
54 parts of sodium-nitrite dissolved in the necessary quantity of water.
After reposing for some time, this liquid is caused to flow into a solution of 10 parts
of salicylic acid and 25 parts of calcinated soda in about 150 parts of water.
The coloring matter, which separates in large quantity, is completely precipitated by
the addition of common salt and is then brought into the form of a paste by suitable
means.
The metanitraniline can be replaced by an equal quanity of paranitraniline, or by
an equivalent quantity (11 parts) of the isomeric nitrotoluidines, or by 11.8 parts of

page_text: The nitro bodies mentioned form with salicylic acid yellow to orange-yellow and
with alpha oxynophtheie seid dark brown coloring matters.
As the coloring matters obtained from the oxynaphthoic acid itself are not soluble
with sufficient facility for practical purposes, it is preferable to use for the combination
with alpha-oxynaphthoic acid the orthonitraniline sulphonic acid described by Nietzki
and Benkiser in the "Berichton chemischen Gesellschaft Vol. 18 p. 2015
As the coloring matters obtained from the oxynaphthoic acid itself are not soluble
with sufficient facility for practical purposes, it is preferable to use for the combination
with alpha-oxynaphthoic acid the orthonitraniline sulphonic acid described by Nietzki
and Benkiser in the "Resichten der chemischen Gesellschaft Vel. 18 p. 201
EXAMPLE II.
5 parts of orthonitraniline sulphonate of potassium are dissolved in 50 parts of
water and then the diazo-compound is produced by the addition of 10 parts of
hydrochloric acid and 15 parts of sodium-nitrite. The liquid is caused to flow into a
solution of 3.5 parts of alpha-oxynaphthoic acid and 7 parts of calcinated soda and the
colouring matter thus formed is precipitated by the addition of common salt.
Dated this 21st day of Danamon 1907
EXAMPLE II.
5 parts of orthonitraniline sulphonate of potassium are dissolved in 50 parts of
water and then the diazo-compound is produced by the addition of 10 parts of
hydrochloric acid and 15 parts of sodium-nitrite. The liquid is caused to flow into a
solution of 3.5 parts of alpha-oxynaphthoic acid and 7 parts of calcinated soda and the
colouring matter thus formed is precipitated by the addition of common salt.
Dated this 21st dov of Donamber 1907
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Production of Yellow and Brown Coloring
Matters or Dyestuffs.
I, OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex 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 is founded on the fact, that the nitrated diazo compounds combine
with certain oxycarbonic acids forming azo-coloring matters, that, like the alizarine
coloring matters, can be fixed on metallic mordants."
Of the oxycarbonic acids are best suited in this case the salicylic acid and the
alpha oxynaphthoic acid.
These acids form especially useful coloring matters with the diazo-compounds
deriving from metanitraniline, paranitraniline, the isomerie nitrotoluidines, nitroxyli-
dines, nitronaphthylamines, their sulpho-acids and similar compounds.
Example 1. 10 parts of metanitraniline are dissolved in 40 parts of hydrochloric
acid (20° Be) and 150 parts of water, and, while the solution is cooling, there are
carefully added 54 parts of sodium nitrite dissolved in the necessary quantity of
water,

page_text: After reposing for some time, this liquid is caused to flow into a solution of 10 parts
of salicylic acid and 25 parts of calcined soda in about 150 parts of water.
The coloring matter which separates in large quantity is completely precipitated by
the addition of common salt, and is then brought into the form of a paste by suitable
means.
The metanitraniline can be replaced by its equivalent quantity of nitronaphthylamine
or its equivalent quantity (11 parts) of the isomeric nitrotoluidines or by 11'8 parts
of nitroxylidine.
The nitro-bodies mentioned form with salicylic acid yellow to orange-yellow, and
with a-oxynaphthoic acid dark brown coloring matters.
As the coloring matters obtained from the oxynaphthoic acid itself are not soluble
with sufficient facility for practical purposes, it is preferable to use for the combination
with a-oxynaphthoic acid the orthonitraniline sulphonic acid described by Nietzki &
Benkiser in the Berichten der Chemischen Gesellschaft Vol. 18 p. 294."
Example 2. parts of orthonitraniline sulphonate of potassium are dissolved in
50 parts of water and then the diazo-compound is produced by the addition of
10 parts of hydrochloric acid and 1-5 parts of sodium nitrite. The liquid is caused to
flow into a solution of 3.5 parts of a-oxynaphthoic acid and 7 parts of calcined soda
and the coloring matter thus formed is precipitated by the addition of common salt.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I hereby declare that no claim
is herein made to the production of coloring matter from paranitraniline and salicylic
acid, but what I claim is :-
The production of coloring matters from the diazo-compounds of the nitroamines
and their sulphonic acids by combining the same with oxycarbonic acids and their
sulphonic acids.
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