IMPROVEMENTS IN THE PREPARATION OF ALIZARINE AND OTHER ANALOGOUS COLORING MATTERS MADE FROM ANTHRACINE."
Year: 1876

page_text: LETTERS PATENT to Richard Simpson, Arthur Brooke, and Thomas Royle, all
of Greenford Green Alizarine Works, Harrow, in the County of Middlesex,
for the Invention of "IMPROVEMENTS IN THE PREPARATION OF ALIZARINE
AND OTHER ANALOGOUS COLORING MATTERS MADE FROM ANTHRACINE."
PROVISIONAL SPECIFICATION left by the said Richard Simpson, Arthur
Brooke, and Thomas Royle at the Office of the Commissioners of Patents on
the 2nd May 1876.
RICHARD SIMPSON, ARTHUR BROOKE, and THOMAS ROYLE, all of Greenford Green
Alizarine Works, Harrow, in the County of Middlesex. "IMPROVEMENTS IN THE
PREPARATION OF ALIZARINE AND OTHER ANALOGOUS COLORING MATTERS MADE FROM
ANTHRACINE."
This Invention has for its object improvements in the preparation of alizarine
and other analogous coloring matters made from anthracine. Such coloring matters
are at the present time sent into the market in a wet or pasty state, and heretoforo
all attempts to use them in a dry state have been unsuccessful, in consequence of
the difficulty which is experienced after the color has been dried of diffusing it in
the dye bath, so that the coloring matter may be taken up by the mordant on the
fabric immersed in the bath. These difficulties we have overcome, and we are
able to produce such colors in the form of a powder, which can be put directly
into the dye bath, and is then without any special manipulation at once ready
for use.
We proceed as follows:-We take 20 parts of hydrate of lime or of carbonate of
lime, by preference the hydrate, and mix it with sufficient water to form a pasto ;
we then add 800 parts of the coloring matter in the pasty, form, the paste con-
taining 10 per cent. of color, or we use a corresponding quantity of a paste of
another per-centage; we well mix the whole, and then place the mixture in a
drying room or otherwise dry it. When sufficiently dry we pass the compound
through a sieve, and it then forms a powder ready for use, as already explained;
or a similar result may be obtained from the "soda melt," as it is called, where in
Prine dl

page_text: the process of manufacture of the coloring matter the coloring principle is obtained
in solution in soda. If lime water be added to the soda melt a precipitate is
obtained, which when dry forms a powder suitable for the dye bath.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Richard Simpson, Arthur Brooke, and Thomas Royle in the Great Seal
Patent Office on the 2nd November 1876.
RICHARD SIMPSON, ARTHUR BROOKE, and THOMAS ROYLE, all of Greenford Green
Alizarino Works, Harrow, in the County of Middlesex. "IMPROVEMENTS IN THE
PREPARATION OF ALIZARINE AND OTHER ANALOGOUS COLORING MATTERS MADE FROM
ANTHRACINE".
This Invention has for its object improvements in the preparation of alizarine,
and other analogous coloring matters made from anthracine. Such coloring matters,
viz., purple alizarine, blue alizarine, red or scarlet alizarino or anthrapurpurine, are
at the present time sent into the market in a wet or pasty state, and heretofore all
attemps to use them in a dry state have been unsuccessful, in consequence of the
difficulty which is experienced after the color has been dried of diffusing it in the
dyo bath, so that the coloring matter may bo taken up by the mordant on the fabric
immersed in the bath. These difficulties we have overcome, and we are able to
produce such colors in the form of a powder, which can be put directly into the dye
bath, and is then without any special manipulation at once ready for use.
We proceed as follows:-We take 20 parts of hydrate of lime, and mix it with
sufficient water to form a paste; we then add 800 parts of the coloring matter in
the pasty form, the paste containing 10 per cent. of color, or we use a corresponding
quantity of a paste of another per-centage; we well mix the whole, and then place
the mixture in a drying room, or otherwise dry it at a temperature not exceeding
212° Fahrenheit. When sufficiently dry we pass the compound through a sieve,
and it then forms a powder ready for use, as already explained; or a similar result
may be obtained from the "soda melt," as it is called, where in the process of
manufacture of the coloring matter the coloring principle is obtained in solution in
soda. If lime water be added to the soda melt in the proportion of 100 parts of
lime water to 5 parts of the soda melt (alizarate or anthrapurpurate of soda) a
precipitate is obtained, which we collect in a filter, and dry as already described.
This
The precipitate when dry forms a powder suitable for the dye bath.
powder does not differ from that obtained by the means first described, which
means are the more convenient.
We claim the preparation of alizarine and other analogous coloring matters made
from anthracine in the form of a dry powder by means of lime, substantially as
described.
In witness whereof, I, the said Thomas Royle, have hereunto set my hand and
seal, this Thirty-first day of October, in the year of our Lord One thousand