IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS
Year: 1882

page_text: LETTERS PATENT to John Imray of N° 28 Southampton Buildings, Chancery
"
Lane, in the County of Middlesex for an Invention of "IMPROVEMENTS IN
THE MANUFACTURE OF COLOURING MATTERS Communicated to him from
abroad by La Société Anonyme des Mutières Colorantes et Produits Chimiques
de S Denis and Mess Roussin and Rosenstiehl all of Paris, France.
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 30th November 1882.
"
JOHN IMRAY of N° 28 Southampton Buildings, Chancery Lane in the County of
Middlesex "IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS
[Communicated to him from abroad by La Société Anonyme des Matières Colorantes
et. Produits Chimiques de St Denis and Mess" Roussin and Rosenstiehl all of Paris,
France.]
Bromine acta rapidly on nitrogenous colouring matters forming substitution
products which differ little in colour from the original matters, but are better
suited for dyeing vegetable fibre and become better fixed.
This invention relates to the manufacture of new colouring matters of the kind
above referred to by the bromine treatment of nitrogenous colouring matters
whether sulphonic or not. As an example of such manufacture, the orange produced
from the reaction of Naphthol and diazophenylsulphurous acid is treated as follows:
100 parts by weight of the orange dissolved in water has added to it a solution in
water of about 60 parts by weight of bromine and to the mixture is added about
130 parts by weight of sulphuric acid. When the reaction is complete the product
is neutralised by a suitable base and the colouring matter is precipitated by salt
in the usual way. In a similar manner analogous colouring matters may be treated,
but the proportions and the order of operation may be considerably varied.
Moreover, any of the ingredients may be treated in the first place with the bromine.
For example, amidophenylsulphurous acid may have the bromine added to it, and
may be transformed into a diazo compound and then treated as phenols, naphthols
or amines are usually treated, thus producing brominised nitrogenous colouring
matter of an isomeric or analogous character. Or otherwise, a diazo derivate may
be made to react on brominised derivates of the phenols, naphthols or amines
with similar results.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Imray in the Great Seal Patent Office on the 29th
May 1883.
"
JOHN IMRAY of No 28 Southampton Buildings, Chancery Lane in the county of
Middlesex "IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS
A communication to me from abroad by La Société Anonyme des Matières
Colorantes et Produits Chimiques de St. Denis and Mess". Roussin and Rosenstiehl
all of Paris, France
Bromine acts rapidly on nitrogenous coloring matters forming substitution
products which differ little in color from the original matters, but are better suited
for dyeing vegetable fibre and become better fixed.
-
This invention relates to the manufacture of new coloring matters of the kind
above referred to by the bromine treatment of nitrogenous sulphonic coloring
matters. As an example of such manufacture, the orange produced from the
reaction of Naphthol and diazophenylsulphurous acid is treated as follows: 100
parts by weight of the orange dissolved in 6500 parts by weight of water, has
added to it a solution in 500 parts water of about 60 parts by weight of bromine,
and to the mixture is added about 130 parts by weight of sulphuric acid. When
the reaction is complete, the product is neutralised by a suitable base, and the
coloring matter is precipitated by salt in the usual way. In a similar manner
analogous coloring matters may be treated, but the proportions and the order of
operation may be considerably varied.
"
.
Having thus described the nature of the said invention and in what manner the
same is to be performed as communicated to me by my foreign correspondents
I claim
The manufacture of improved coloring matters by direct addition of bromine to
nitrogenous sulphonic coloring matters, substantially as and for the purposes herein
set forth.
In Witness whereof I the said John Imray have hereunto set my hand and
seal this Twenty ninth day of May in the year of our Lord, one thousand
eight hundred and eighty three: