IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS SUITABLE FOR DYEING AND PRINTING
Year: 1882

page_text: LETTERS PATENT to Joseph Anthony Dixon, of 175, West George Street,
Glasgow, in the County of Lanark, North Britain, Solicitor, for an Invention
of "IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS SUITABLE
FOR DYEING AND PRINTING." A communication from abroad by Dr. Carl
Koenig, of Höchst-am-Main, in the Empire of Germany, one of the Directors
of the Farbwerke vorm: Meister, Lucius, and Brüning, of Höchst-am-Main,
aforesaid.
PROVISIONAL SPECIFICATION left by the said Joseph Anthony Dixon at
the Office of the Commissioners of Patents on the 4th January 1882.
JOSEPH ANTHONY DIXON, of 175 West George Street, Glasgow, in the County
of Lanark, North Britain, Solicitor. "IMPROVEMENTS IN THE MANUFACTURE OF
COLOURING MATTERS SUITABLE FOR DYEING AND PRINTING." [A communication
from abroad by Dr. Carl Koenig, of Höchst-am-Main, in the Empire of Germany,
one of the Directors of the Farbwerke vorm: Meister, Lucius, and Brüning, of
Höchst-am-Main, aforesaid.]
My Invention has for its nature and object the conversion of paraleucaniline
and of its homologues into colouring matters of the rosaniline series. The
mode of effecting the said conversion is by heating the salts of paraleucaniline
[CH (C, H, NH.) 3] and of its homologues with the bydrates of metallic oxides,
such for example as the hydrated oxide of iron. As an example of the process
give the following details:-A thorough mixture of one part of hydrochlorate of
leucaniline with an excess of hydrate of oxide of iron is heated at a temperature
of 248-284° Fahrenheit (120°-140° centegrade) in an open or in a closed vessel
until a green smelt with a metallic lustre has been formed. By boiling the mass
in water by filtering the solution so obtained and by mixing the filtrate with
common salt I obtain the formed colouring matter which, if necessary, can be
purified in well known manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Joseph Anthony Dixon in the Great Seal Patent Office on the
9th June 1882.
JOSEPII ANTHONY DIXON, of 175 West George Street, Glasgow, in the County
of Lanark, North Britain, Solicitor. "IMPROVEMENTS IN THE MANUFACTURE OF
COLOURING MATTERS SUITABLE FOR DYEING AND PRINTING." A communication
from abroad by Dr. Carl Koenig of Hochst-am-Main in the Empire of Germany,
one of the Directors of the Farbwerke vorm Meister Lucius and Brüning, of
Höchst-am-Main, aforesaid.
My Invention has for its nature and object the conversion of paraleucaniline,
and of its homologues, into colouring matters of the rosanilino series. The
mode of effecting the said conversion is by heating the salts of paraleucaniline
[CH. (C, H, NH.) 3] and of its homologues, with the hydrates of metallic oxides,
euch for example as the hydrated oxide of iron. As an example of the process I
give the following details: A thorough mixture of one part of hydrochlorate of
leucaniline with an excess of hydrate of oxide of iron, is heated at a temperature
of 248° to 284° Fahrenheit (120°-140° centigrade), in an open or in a closed
vessel, until a green smelt with a metallic lustre has been formed. By boiling the
mass in water, by filtering the solution so obtained, and by mixing the filtrate with
common salt, I obtain the formed colouring matter which, if necessary, can be
purified in well known manner.
Having now described and particularly ascertained the nature of the said
Invention and the manner in which the same is, or may be carried into effect, I
would observe in conclusion that what I consider novel and original and there-
fore claim as the Invention secured to me by the hereinbefore in part recited
Letters Patent is :-
The production of dyestuffs of the rosaniline series by heating the salts of
paraleucaniline and its homologues along with hydrates of metallic oxides and
separating the colouring matter so formed, all in manner hereinbefore described.
In witness whereof I, the said Joseph Anthony Dixon, have hereunto set my
hand and seal this Eighteenth day of May, in the year of our Lord One
thousand eight hundred and eighty two.
JOSEPH ANTHONY DIXON. (L.S.)