New Red Colouring Matters of the Triphenylmethane Group, and Method of Producing the same.
Year: 1896

page_text: Date of Application, 20th July, 1896
Complete Specification Left, 20th Jan., 1897-Accepted, 13th Mar., 1897
PROVISIONAL SPECIFICATION.
New Red Colouring Matters of the Triphenylmethane Group, and
Method of Producing the same.
1, JULES JOSEPH MATHIEU VILLE of 95 Boulevard Beaumarchais, Paris,
in the Republic of France, Professor of Medicine at the University of Montpellier,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the formation of new red colouring matters-which
I term Rodazines-of the triphenylmethane group, and to the method of producing
the same.
Aniline acts on rosolic acid producing a blue colouring substance-azuline-the
constitution of which is unknown.
I have caused different diamines to act on rosolic acid such as para- and
metaphenylene diamines, para- and metacresylene diamines, and have thus obtained
blue colouring matters.
Then I substituted for aromatic amines hydrazines of the same group and
I obtained in this manuer colouring substances of great commercial value, especially
when using phenylhydrazine.
These colouring matters are obtained by heating for, say, twelve hours in an
ascending refrigerating vessel:
I. Three molecules of phenylhydrazine and one molecule of rosolic acid.
II. Two molecules of phenylhydrazine and one molecule of rosolic acid in the
presence of alcohol.
III. One molecule of phenylhydrazine and one molecule of rosolic acid in
presence of alcohol.
In the second case it is preferable to remove the alcohol before the end of the
operation and to continue to heat the rosolic acid and-phenylhydrazine alone.
The colouring matters when removed appear as a red-brown mass, which is
crushed before being made use of.
For use, these colouring matters are to be dissolved in concentrated acetic acid
and then poured into the dyeing bath. Sodium aluminate is then added until the
bath is only very slightly acid.
Dated this 20th day of July 1896.
ת בזיו זו
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
New Red Colouring Matters of the Triphenylmethane Group, and
Method of Producing the same.
I, JULES JOSEPH MATHIEU VILLE of 95 Boulevard Beaumarchais, Paris
in the Republic of France, Professor of Medicine at the University of Montpellier,
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 new red colouring matters-which I term Rodazines-
of the triphenylmethane group, and to the method of producing the same.

page_text: Aniline acts on rosolic acid producing a blue colouring substance-azuline-the
constitution of which is imperfectly known.
I have caused different diamines to act on rosolic acid such as para- and meta-
phenylene diamines, para- and metacresylene diamines, and have thus obtained
blue colouring matters.
Then I substituted for aromatic amines hydrazines of the same group and
I obtained in this manner colouring substances of great commercial value, especially
when using phenylhydrazine.
These colouring matters are obtained by heating for say, twelve hours in an
ascending refrigerating vessel:
I. Three molecules of phenylhydrazine and one molecule of rosolic acid.
II. Two molecules of phenylhydrazine and one molecule of rosolic acid in the
presence of alcohol.
111. One molecule of phenylhydrazine and one molecule of rosolic acid in the
presence of alcohol.
In the second case it is preferable to remove the alcohol before the end of the
operation and to continue to heat the rosolic acid and phenylhydrazine alone.
The colouring matters when removed appear as a red-brown mass, which is
crushed before being made use of.
For use, these colouring matters are to be dissolved in concentrated acetic acid
and then poured into the dyeing bath. Sodium aluminate is then added until the
bath is only very slightly acid.
By this process consisting in heating for about twelve hours aromatic hydrazines
with rosolic acid, the vapours evolved during the operation being condensed in
the apparatus; and the operation taking place in the presence of the alcohol, or
without, the new red colouring matters-Rodazines-are obtained the proportion
of aromatic hydrazines and rosolic acid varying according to the shade of the
dyestuff to be obtained.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what. I
claim is :-
1. The manufacture of red colouring matters consisting in heating aromatic
hydrazines with rosolic acid, the vapours evolved during the operation being
condensed, the operation taking place in the presence of alcohol, or not, and the
proportion of aromatic hydrazines and rosolic acid varying in accordance with the
depth of colour desired substantially as described.
2. In the process described the use of phenylhydrazine and rosolic acid
substantially as described.
3. The red colouring matters produced by the process described.
Dated this 20th day of January 1897.
BOULT & WADE,
Agents for the Applicant.