IMPROVEMENTS IN THE PRODUCTION OF ORANGE AND SCARLET DYES
Year: 1879

page_text: LETTERS PATENT to Ivan Levinstein, of Manchester, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN THE PRODUCTION OF
ORANGE AND SCARLET DYES."
Sealed the 17th June 1879, and dated the 15th February 1879.
Sealed the 17th June 1879, and dated the 15th February 1879.
PROVISIONAL SPECIFICATION left by the said Ivan Levinstein at the
Office of the Commissioners of Patents on the 15th February 1879.
IVAN LEVINSTEIN, of Manchester, in the County of Lancaster. * IMPROVEMENTS
IN THE PRODUCTION OF ORANGE AND SCARLET DYES."
This Invention has for its object the manufacture of orange and scarlet coloring
matters.
It is well known that diazobenzol, diazotolnol, or diazoxylol in combination with
the alpha or beta sulfonaphtolic acids produce orange coloring matters. My Inven-
tion consists in the separation of these orange coloring matters into two different
colors, viz., into an orange of a yellow shade and into a scarlet.
For a pure scarlet shade I take the diazotolnol, and for scarlet of a bluer shade I
take the diazoxylol in combination with the betasulfonaphtolic acid salts.
In order to carry out my Invention I heat one part of betanaphtol with three
parts of concentrated sulphuric acid for half an hour at from 130 to 135 degrees
centigrade. I pour this acid mixture into about 48 parts of water, and add slaked
lime to it until the liquor has a slight alkaline reaction, when I add two parts of
soda, and boil the whole mass for a few minutes, allow it to settle, and then filter or
decant the clear liquor from it. As soon as this filtered liquor is quite cold I add
to it a cold solution of diazotolnol chlorid so long as a precipitate is formed..
I filter this precipitate which dyes an orange color dry, and powder it and digest
hot one part of the same with four parts of methylated spirit 60%, or strong
alcohol and half a part of ammonia 10%
The scarlet which the orange contains is insoluble, or nearly so, in the spirit
ammonia, and is separated from it by filtering or otherwise, and the spirit solution
which contains the orange of a yellow shade is evaporated to dryness.
I thus obtain two different colors, each of which will dye woollen, silk, and other
fabrics a beautiful color.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Ivan Levinstein in the Great Seal Patent Office on the 15th
August 1879.
IVAN LEVENSTEIN, of Manchester, in the County of Lancaster.
IN THE PRODUCTIONS OF ORANGE AND SCARLET DYES."
"IMPROVEMENTS
This Invention has for its object the manufacture of orange and scarlet coloring
matters, and consists in the separation into a scarlot and yellow-orange dye of the
orange precipitate resulting from the combination diazobenzole, diazotoluol, or
diazoxytol with alpha or betasulphonaptholic acid as hereinafter described.
It is well known to chemists that diazobenzol, diazotoluol, or diazoxylol when
combined with alphasulphonaphtolic or betasulphonaphtolic acid will produce or
yield as a resultant an orange precipitate or coloring matter, and to this I make no
claim.
My Invention relates to a method or process of separating the coloring matter so
produced into two different dyes or dyeing substances, one for dyeing scarlet and
the other for dyeing a yellow orange color.
In carrying out my Invention in its preferred form I heat one part by weight of
betanaphtol with three parts by weight of concentrated sulphuric acid for about
half-an-hour at from one hundred and thirty degrees (130°) to one hundred and
thirty fivo degrees (135°) centigrade. I pour this acid mixture into about forty-
eight (48) parts by weight of water, and add to it slaked lime until the liquor has
a slightly alkaline reaction. I then add two (2) parts by weight of soda, boil the
whole mass for a few minutes, allow it to settlo, and filter or decant the clear liquor
from it. As soon as this filtered liquor is quite cold I add to it a cold solution of
diazotoluolchloride so long as a precipitate is formed, which is the coloring matter
for producing an orange colored dye before mentioned, and which for convenience
I will hereinafter refer to as the precipitate A, dry and powder it, and digest, hot,
one part by weight of the same with four parts by weight of methylated spirit
sixty degrees above proof (60° o.p.) or in alcohol from eighty (80) to ninety (90)
Tralles, and half a part by weight of aminonia, ten per centum (10%).
The scarlet dye or matter which the precipitate A contains is insoluble, or nearly
so, in the compound of spirit and ammonia, and is separated by filtering or other-
wise, and the spirit solution which contains an orange coloring matter of a yellow
shade is evaporated to dryness.
If necessary I repeat this process of separation once or twice so as to extract all
of the orange matter or dye. I thus obtain from the precipitate A two dyes or
kinds of dyeing matter of different colors, each of which may be employed in dyeing
woollens, silks, and other materials, imparting to them the most brilliant colors.
For producing scarlet dyes of a light or yellow cast or tint I prefer to employ
betasulphonaphtolic acid salts with a solution of diazotoluolchlorido, but for scarlets
of a redder shade I prefer the betanophtolic acid salts with a solution of diazoxylol-
chloride.
In preparing the solutions of the chlorides I proceed as follows:-
For diazobenzolchloride I mix three parts by weight of aniline with six parts by
weight of hydrochloric acid 30° Fharenheit, I add to this 50 parts by weight of
water, allow it to cool, and then add two parts by weight of pure nitrate of soda,
I stir the whole for a few minutes, when it is ready for use.
For diazotoluolchloride I employ the same process, but substitute toluidin for
the analine, and for diazoxylochloride I substitute xylidin for the analine.
I do not wish to confine myself to the exact proportions of soda or water,
ammonia, and spirit above given, as they may be varied. somewhat without
materially effecting the result, and the lime, soda, and the ammonia may be
replaced by other alkaline equivelents.
What I claim as my Invention is,―
1. The process, substantially as hereinbefore described, for seperating from

page_text: the orange precipitates produced as hereinbefore described a scarlet dye or dyeing
material for the purposes set forth.
2. The method of separating the precipitates formed as hereinbefore described,
which consists in digesting the same in spirit and ammonia, whereby the yellow
5 orange portion of the precipitate is dissolved, and the scarlet portions left undis-
solved, substantially as set forth.
3. The methods of separating the scarlet and yellow-orange components of the
precipitates produced from the chemicals as hereinbefore described, and which
consists in dissolving out the soluable componant by means of a solvent, which will
> not act on or dissolve the other component, substantially as set forth.
In witness whereof, I, the said Ivan Levinstein, have hereunto set my
hand and seal, this 1st day of August 1879.
TH