IMPROVEMENTS IN OBTAINING GREEN COLORING MATTERS OF VARIOUS SHADES FOR DYEING AND PRINTING
Year: 1866

page_text: LETTERS PATENT to Read Holliday, of Huddersfield, in the County of
York, Manufacturing Chemist, for the Invention of "IMPROVEMENTS IN
OBTAINING GREEN COLORING MATTERS OF VARIOUS SHADES FOR DYEING AND
PRINTING." A communication from abroad by Heinrich Minhorst and
Friedrich Wilhelm Schultes, of Crefeld, in the Kingdom of Prussia.
Sealed the 3rd November 1866, and dated the 10th May 1866.
PROVISIONAL SPECIFICATION left by the said Read Holliday at the
Office of the Commissioners of Patents, with his Petition, on the 10th
May 1866.
I, READ HOLLIDAY, of Huddersfield, in the County of York, Manufac-
turing Chemist, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN OBTAINING GREEN COLORING MATTERS OF VARIOUS SHADES FOR
DYEING AND PRINTING," (communicated to me from abroad by Heinrich Min-
horst and Friedrich Wilhelm Schultes, of Crefeld, in the Kingdom of
Prussia,) to be as follows:-
This Invention has for its object improvements in the manufacture of green
coloring matters of various shades suitable for dyeing and printing. In
obtaining varieties of violet coloring matters from rosaniline or from salts of
rosaniline by the action thereon of certain iodine or bromine compounds or
derivatives it is customary to heat the substances in closed vessels to a
temperature of from about 212° to 250° Fahrenheit for 3 to 8 hours, and

page_text: to separate the violet colors so produced, and to obtain the iodine or bromine
which otherwise would be wasted, it has been usual to treat the product so
as to obtain separately the violet colors in an insoluble and the iodine in
a soluble condition.
According to the present improvements the product resulting from the
heating of the iodine or bromine derivative with rosaniline or a salt of
rosaniline, and an alcohol is taken from the close vessels and dissolved in
water, and this solution (instead of being acted on only to recover the iodine as
is usual) is treated with an alkali or an alkaline salt, by preference, acetate
of soda, to precipitate foreign matters injurious to the green or blue green
coloring matter remaining in the solution. The solution when cold is care-
fully filtered and is a coloring matter or dye not hitherto used for dyeing and
printing. To obtain a pure green the heat instead of being stopped at 3 to 8
hours is continued for 18 hours or longer. The green coloring matter may
also be produced from the violet coloring matters herein-before mentioned by
heating them in a closed vessel at about 212° Fahrenheit (or it may be
somewhat higher) with about their own weight of any of the iodine or
bromine derivatives. bitherto used for manufacturing violet colors from
rosaniline or its salts, and about twice their weight of alcohol or wood spirit
for a length of time, according as a green or blue green dye is required.
The resulting product is treated the same as when rosaniline or its salts are
used. In dyeing with this dye the waters should be as free from lime as
possible; a little oxalic acid will be found useful in the dye bath.
SPECIFICATION in pursuance of the conditions of the Letters. Patent, filed
by the said Read Holliday in the Great Seal Patent Office on the 2
10th November. 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, READ
HOLLIDAY, of Huddersfield, in the County of York, Manufacturing Chemist,
.send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters 3
Patent, bearing date the Tenth day of May, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Read Holliday, Her special licence that I, the said Read Holliday,
my executors, administrators, and assigns, or such others as I, the said Read 8
Holliday, my executors, administrators, and assigns, should at any time agree

page_text: .
with, and no others, from time to time and at all times thereafter during the
terin therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN OBTAINING
GREEN COLORING MATTERS OF VARIOUS SHADES FOR DYEING AND PRINTING," (Com-
municated to me from abroad by Heinrich Minhorst and Friedrich Wilhelin
Schultes, of Crefeld, in the Kingdom of Prussia,) upon the condition (amongst
others) that I, the said Read Holliday, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention, .
and in what manuer the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Read Holliday, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in the manufacture of green
coloring matters of various shades suitable for dyeing and printing. In
obtaining varieties of violet coloring matters from rosaniline or from salts of
rosaniline by the action thereon of certain iodine or bromine compounds or
derivatives; it is customary to heat the substances in closed vessels to a
temperature of from about 212° to 250° Fahrenheit for from 8 to 8 hours,
and to separate the violet colors so produced, and to obtain the iodine or
bromine which otherwise would be wasted, it has been usual to treat the
product so as to obtain separately the violet colors in an insoluble and the
iodine in a soluble condition.
According to the present improvements the product resulting from the
heating of the iodine or bromine derivative with rosaniline or a salt of
rosaniline and an alcohol is taken from the closed vessels and dissolved in
hot water, and this solution (instead of being acted on only to recover the
iodine as is usual) is treated for purification with a diluted alkali or a solution
of an alkaline salt, by preference acetate of soda, to precipitate foreign
matters injurious to the green or blue green coloring matter remaining in
the solution. The solution when cold is carefully filtered, and is a coloring
matter or dye not hitherto used for dyeing and printing. To obtain a green
or blue green the heat instead of being stopped at 3 to 8 hours is continued
for 18 hours or longer. The green or blue green coloring matter I also
produce from the violet coloring matters herein-before mentioned by heating

page_text: them in a closed vessel at about 212° Fahrenheit (or it may be somewhat
higher), with about their own weight of the iodine or bromine derivatives
(using by preference for this purpose the iodides or bromides of the alcohol
radicals) hitherto used for manufacturing violet colors from rosaniline or its
salts, and by preference with about twice their weight of alcohol or wood
spirit for a length of time according as a green or blue green dye is required.
The resulting product I dissolve in hot water, and then purify as before
stated with a solution of a salt of an alkali, preferring for the purpose acetate
of soda. The insoluble mass remaining will be found to be a blue or blue
green coloring matter, which when dissolved is ready for use in dyeing or
printing. The solvent for the coloring matter may be acid or alcobol,
according to the purpose to which such coloring matter is to be applied. In
using these dyes the waters should be as free from lime as possible; a little
oxalic acid will be found useful in the dye bath.
In witness whereof, I, the said Read Holliday, have hereunto set my
hand and seal, this Ninth day of November, in the year of our Lord
One thousand eight hundred and sixty-six.
READ HOLLIDAY. (L.S.)