THE PRODUCTION OF NEW COLORING MATTERS FROM PHTALAMINE
Year: 1878

page_text: LETTERS PATENT to John Clayton Mewburn, of 169, Fleet Street, in the City
A
of London, Patent Agent and Consulting Engineer, for the Invention of
"THE PRODUCTION OF NEW COLORING MATTERS FROM PHTALAMINE."
communication from abroad by Alcide François Poirrier, Manufacturer,
Daniel Auguste Rosenstiehl, Chemist, and Zacharie Roussin, Chemist, all of
Paris, France.
Sealed the 15th April 1879, and dated the 6th November 1878.
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at
the Office of the Commissioners of Patents on the 6th November 1878.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "THE PRODUCTION OF NEW COLORING MATTERS
FROM PHTALAMINE." [A communication from abroad by Alcide François Poirrier,
Manufacturer, Daniel Auguste Rosenstiehl, Chemist, and Zacharie Roussin, Chemist,
all of Paris, France.]
This Invention consists in producing new coloring matters from phtalamine.
The substance which I here denominate phtalamine is an alkaloid which accom-
panies crude naphtylamine, and is present particularly in the liquid products which
impregnate the latter. It is distinguished from naphtylamine by its sulpho-
conjugated derivative, which is soluble in water, while, under the same conditions,
naphthionic acid or the sulpho-conjugated derivative of naphtylamine is not. By
here giving this definition it is not intended to enter into the question whether this
body is identical with that of the same name discovered by Messrs. Schützenberger
and Willm in 1859 in crude naphtylamine. The present Inventors obtain a series
of coloring matters by taking phtalamine, from which they make the sulpho-
conjugated derivative, then by means of nitrous acid, the diazoic derivative, thus
following the well known processes of chemists. This diazoic sulpho-conjugated
derivative is united directly with phenols and amines of all classes, and produces a
series of coloring matters.

page_text: It will be understood that instead of sulpho-conjugating the phtalamine its diazoic
derivative can-be-prepared directly.and.be.combined with sulpho-conjugated amines
and phenols. Or, again, the diazoic derivative may be made to act on phenols or
amines of any class, and the resulting coloring matter be sulpho-conjugated. To
whichever way the preference is given a series of coloring matters is obtained;
these matters are in their turn susceptible of a special transformation. By the
action of heat, especially with the aid of water and of an alkali or alkaline salt,
they are transformed into other coloring matters. I will particularly mention
among these that which is obtained with beta naphthol. This material will dye
-wool a-very intense-red, and for this reason it may take the place of orchil in its
applications.
The present Invention is therefore based on the discovery, firstly, that phtala-
mine will give rise to a series of coloring matters by the process above indicated;
and, secondly, that these matters will themselves give rise to derived products
under the action of heat, with or without the aid of alkaline water, and possessing
the property of being coloring matters.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Clayton Mewburn in the Great Seal Patent Office on the 6th
May 1879.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "THE PRODUCTION OF NEW COLORING MATTERS
FROM PHTALAMINE." A communication from abroad by Alcide François Poirrier,
Manufacturer, Daniel Auguste Rosenstiehl, Chemist, and Zacharie Roussin, Chemist,
all of Paris, France.
By
This Invention consists in producing new coloring matters from phtalamine.
The substance which I here denominate phtalamine is an alkaloid which accom-
panies crude naphtylamine, and is present particularly in the liquid products which
impregnate the latter. It is distinguished from naphtylamine by its sulpho-
conjugated derivative, which is soluble in water, while, under the same conditions,
naphthionic acid or the sulpho-conjugated derivative of naphtylamine is not.
here giving this definition it is not intended to enter into the question whether
this body is identical with that of the same name discovered by Messrs. Schützen-
berger and Willm in 1859 in crude naphtylamine. The present inventors obtain a
series of coloring matters by taking phtalamine, from which they make the sulpho-
conjugative derivative, then by means of nitrous acid the diazoic derivative, thus
following the well known processes of chemists. This diazoic sulpho-conjugated
derivative is united directly with phenols and amines of all classes, and produces a
series of coloring matters.
It will be understood that instead of sulpho-conjugating the phtalamine its diazoic
derivative can be prepared directly and be combined with sulpho-conjugated amines
and phenols. Or, again, the diazoic derivative may be made to act on phenols or
amines of any class, and the resulting coloring matter be sulpho conjugated. To
whichever way the preference is given a series of coloring matters is obtained;
these matters are in their turn susceptible of a special transformation. By the
action of heat, especially with the aid of water and of an alkali or alkaline salt,
they are transformed into other coloring matters. I will particularly mention
among these that which is obtained with beta naphthol. This material will dye
wool a very intense red, and for this reason it may take the place of orchil in its
applications.
The present Invention is therefore based on the discovery, firstly, that phtala-
mine will give rise to a series of coloring matters by the processes above indicated;
and, secondly, that these matters will themselves give rise to derived products
under the action of heat, with or without the aid of alkaline water, and possessing
the property of being coloring matters.
And having now described the nature of the said Invention, and in what manner
the same is to be performed, I declare that I claim,―
The production of coloring matters from phtalamine, substantially as herein before
described.
In witness whereof, I, the said John Clayton Mewburn, have hereunto set
my hand and seal, this Sixth day of May, One thousand eight hundred and
seventy-nine.
J. C. MEWBURN. (L.S.)