IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS FROM COAL PAR PRODUCTS
Year: 1882

page_text: LETTERS PATENT to Charles Lowe of Reddish near Stockport in the County
of Lancaster Manufacturing Chemist. for an Invention of IMPROVEMENTS IN
THE MANUFACTURE OF COLOURING MATTERS FROM COAL PAR PRODUCTS
PROVISIONAL SPECIFICATION left by the said Charles Lowe at the Office
of the Commissioners of Patents on the 22nd November 1882.
CHARLES LOWE, of Reddish near Stockport in the County of Lancaster,
Manufacturing Chemist, IMPROVEMENTS IN THE MANUFACTURE OF COLOURING
MATTERS FROM COAL TAR PRODUCTS.
The object of this invention is to manufacture by new and improved processes
basic and conjugated acid red coloring matters which I respectively designate
under the names of Roso-phenoline and Roso-phenoline-sulphonic acid from the
product well known to Chemists generally under the names of Aurin or Yellow
Corralline and this object I carry into effect by the methods described below:
To obtain the basic red coloring matter, which I designate as Roso-phenoline
and its salts, I heat to a temperature between 212° F and 400° F the aurin with a
mixture or combination of ammonia and an organic acid either in aqueous Ethylic
Phenylic, or other alcoholic solution either in open vessels at ordinary atmospheric
pressure or in closed vessels at a pressure superior to ordinary atmospheric pressure
until the aurin is converted into the red coloring matter named
By preference I employ Benzoic Acid although other organic acids may be
satisfactorily substituted for it in the mixture or combination above described.
The duration of the operation will vary with the quantities of material and the
degree of pressure employed.
The following proportions will give a good result although they may be con-
siderably varied without materially affecting the economy and successful working
of the process as will be understood by all chemists—
.

page_text: The coloring matter thus produced is purified for the market either in its Basic
state or converted into a salt by any of the general processes well known and
applied by all chemists for similar purposes
The conjugated acid red coloring matter above referred to and which I call and
describe as Roso-phenoline-Sulphonic Acid I manufacture in two ways.
First method. I take 1. part of the basic red coloring matter the preparation of
which is described above and which I call Roso-phenoline or its salts, and heat it
with 5 parts Sulphuric Acid at a temperature between 212° & 400° F until it
is almost or altogether transformed into a Sulphonic Acid of the base Roso-
Phenoline.
The excess of Sulphuric Acid is removed by the usual processes employed by
Chemists or manufacturers for similar purposes and the Sulphonic Acid of the base
Roso-Phenoline may either be utilised as such or converted into a salt in the usual
well known manner for more convenient application to industrial purposes.
The second method of manufacturing the conjugated acid red coloring matter
above referred to and which I designate and describe under the name of Roso-
phenoline-Sulphonic Acid I carry into effect as follows:
I take 1 part Aurin or Yellow Corralline and heat it at a low temperature
between 100° & 212° F with 5 parts Sulphuric Acid so as to convert it into Aurin-
Sulphonic Acid and the product obtained after separation of the excess of Sulphuric
Acid in the usual manner well known to Chemists I heat with Ammonia either
in Aqueous, Ethylic, Phenylic, or other Alcoholic solution either in open vessels at
ordinary atmospheric pressure, or in closed vessels at pressures exceeding that of
the atmosphere until the coloring matter designated by ne under the name of
Roso-phenoline-sulphonic acid is produced. The ammoniacal salt of the Roso-
plenoline-sulphonic acid thus prepared may be employed for dyeing purposes as
such or may be further purified by any of the well known general processes
applicable to the purification of Sulphonic Acids and their salts

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Lowe in the Great Seal Patent Office on the 9th May
1883.
CHARLES LOWE of Reddish near Stockport in the County of Lancaster,
5 Manufacturing Chemist. "IMPROVEMENTS IN THE MANUFACTURE OF COLOURING
MATTERS FROM COAL TAR PRODUCTS "
The object of this Invention is to manufacture by new and improved processes
basic and conjugated acid red colouring matters which I respectively designate under
the names of Roso-phenoline and Rosophenoline Sulphonic Acid from the product
well known to Chemists generally under the names of Aurin or Yellow Corralline
and this object I carry into effect by the methods described below.
To obtain the basic red colouring matter which I designate as Rosophenoline
and its salts I beat to a temperature between two hundred and twelve degrees
Fahrenheit and four hundred degrees Fahrenheit (212° Fahrenheit and 400°
Fahrenheit) the Aurin with a mixture or combination of Ammonia and an organic
acid either in Aqueous, Ethylic, phenylic or other alcoholic solution either in open
vessels at ordinary atmospheric pressure or in closed vessels at a pressure superior
to ordinary atmospheric pressure until the Aurin is converted into the red colouring
matter named. By preference I employ Benzoic Acid although other organic acids
may be satisfactorily substituted for it in the mixture or combination above
described.
The duration of the operation will vary with the quantities of material and the
degree of pressure employed.
The following proportions will give a good result although they may be con-
siderably varied without materially affecting the economy and successful working
of the process as will be understood by all Chemists.
Aurin.
Aqueous; Ethylic, Phenylic or other Alcoholic
solutions of Ammonia
Benzoic or other Organic Acid.
One part.
Ten parts.
One part.
The colouring matter thus produced is purified for the market either in its Basic
state or converted into a salt by any of the general processes well known and
applied by all Chemists for similar purposes.
The conjugated acid red colouring matter above referred to and which I call and
describe as Roso-phenoline Sulphonic Acid I manufacture in two ways:—
First method. I take one part of the basic red colouring matter the preparation
of which is described above and which I call Rosophenoline or its salts and heat it
with five parts Sulphuric Acid at a temperature between two hundred and twelve
degrees and four hundred degrees (212° and 400°) Fahrenheit until it is almost or
altogether transformed into a Sulphonic Acid of the base Rosophenoline. The
excess of Sulphuric Acid is removed by the usual processes employed by Chemists
or Manufacturers for similar purposes and the Sulphonic Acid of the base Roso-
phenoline may either be utilized as such or converted into a salt in the usual well
known manner for more convenient application to industrial purposes.
The second method of manufacturing the conjugated acid red colouring matter
above referred to and which I designate and describe under the name of
Rosophenoline Sulphonic Acid I carry into effect as follows
I take one part Aurin or Yellow Corralline and heat it at a low temperature
between one hundred degrees and two hundred and twelve degrees (100° and 212°)
Fahrenheit with five parts Sulphuric Acid so as to convert it into Aurin-Sulphonic

page_text: Acid and the product obtained after separation of the excess of Sulphuric Acid in the
usual manner well known to Chemists I heat with Ammonia either in Aqueous,
Ethylic, Phenylic, or other Alcoholic solution either in open vessels at ordinary
atmospheric pressure or in closed vessels at pressures exceeding that of the atmo-
sphere until the colouring matter designated by me under the name of Rosophenoline
Sulphonic Acid is produced. The ammoniacal salt of the Rosophenoline Sulphonic
Acid thus prepared may be employed for dyeing purposes as such or may be farther
purified by any of the well known general processes applicable to the purification
of Sulphonic Acids and their salts.
Having stated the nature of my Invention and described the manner of
performing the same
I declare that I claim
The invention of new and improved processes for the manufacture of derivatives
from coal tar products which derivatives being basic or conjugated acid red
colouring matters I respectively designate by name as Rosophenoline and Roso-
phenoline Sulphonic Acid and manufacture them by the methods above described
either in their free states as base or conjugated Sulphonic Acid or in combination
with acids and bases forming salts.
In witness whereof I the said Charles Lowe have hereunto set my hand
and seal this eighth day of May One thousand eight hundred and eighty
three
CHAS. LOWE (L.S.)