IMPROVEMENTS IN THE PREPARATION OF DYE STUFFS
Year: 1879

page_text: LETTERS PATENT to Edward Thomas Hughes, of the Firm of Hughes and
"
Son, Patent Agents, 123, Chancery Lane, London, for the Invention of
IMPROVEMENTS IN THE PREPARATION OF DYE STUFFS." A communication
from abroad by Messieurs Friedrich Bayer and Co., of Barmen, Germany.
ealed the 23rd September 1879, and dated the 24th March 1879
PROVISIONAL SPECIFICATION left by the said Edward Thomas Hughes at
the Office of the Commissioners of Patents on the 24th March 1879.
EDWARD THOMAS HUGHES, of the Firm of Hughes and Son, Patent Agents,
123, Chancery Lane, London. "IMPROVEMENTS IN THE PREPARATION OF DYE
STUFFS." A communication from abroad by Messrs. Friedrich Bayer and Co., of
Barmen, Germany.
According to this Invention I prepare the methyl-ethyl-amyl and similar ethers
of the isomeric naphtholmono and disulphonic acids and also of the sulphonic acids,
of the dioxynaphthaline, and in acting with these ether acids upon aromatic diazo-or
diazoamido compounds obtained from aniline, toluidine, xylidine, and their methyl-
ethyl-amyl products or from the amido-phenols, amidophenol, amido-kressol, and
their ethers, or from the aromatic amido-acids, say, the isomeric amidobenzoic acids,
I may obtain a numerous variety of dye stuffs.
To prepare the ethers of the naphthols as well as of the dioxynaphthaline the sodium
or potassium compounds of the naphthols or the dioxonaphthaline are formed, and
these compounds are heated in closed vessels along with the equivalent quantities
of the chloro-or bromohydrocarbons with the addition of their respective alcohols at
a sufficiently high temperature.
For example, for preparing the methylether we heat in a strong closed iron vessel,
say, 37 lbs. of the sodium composed of naphthol or dioxynaphthaline with 11 lbs.
of methylchloride, and with the addition of a sufficient quantity of wood spirit for
5 hours at 212° Fahrenheit. Afterwards I distil off the wood spirit, decompose the.
remaining residue by aid of an acid (such as diluted muriatic acid) and remove the
separated ether from the acitulated water. By treating the so obtained ethers of
the naphthols or of the dioxynaphthaline with strong sulphuric acid at a lower or
higher temperature I obtain the ethers of the sulfonated naphthols or the sulfonated
dioxynaphthaline, the sodium salts of which in an ammoniacal solution yield with
the different aromatic diazo-compounds a great variety of dye shades.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Thomas Hughes in the Great Seal Patent Office on
the 24th September 1879.
EDWARD THOMAS HUGHES, of the Firm of Hughes and Son, Patent Agents,
123, Chancery Lane, London. "IMPROVEMENTS IN THE PREPARATION OF DYE-
STUFFS." A communication from abroad by Messieurs Friedrich Bayer and
Company, of Barmen, Germany.
According to this Invention we prepare the methyl-ethyl-amyl and similar ethers
of the isomeric naphtholmono and disulphonic acids, and also of the sulphonic acids
of the dioxynaphthaline, and in acting with these etheracids upon aromatic diazo-
or diazoamido-compounds obtained from analine, toluidine, xylidine, and their
methyl-ethyl-amyl products, or from the amido-phenols, amidophenol, amidokressol,
and their ethers, or from the aromatic amidoacids, say, the isomeric amidobenzoic
acids, we may obtain a numerous variety of dye-stuffs.
To prepare the ethers of the naphthols as well as of the dioxynaphthaline the
sodium or potassium compounds of the naphthols or the dioxynaphthaline are
formed, and these compounds are heated in closed vessels along with the equivalent
quantities of the chloro or bromohydrocarbons with the addition of their respective
alcohols at a sufficiently high temperature.
For example, for preparing the methylether we heat in a strong closed iron vessel
say, 371 lbs. of the sodium compound of naphthol or dioxynaphthaline with 11 lbs.
of methylchloride, and with the addition of a sufficient quantity of wood spirit for
5 hours at 212° Fahrenheit. Afterwards we distil off the wood spirit, decompose
the remaining residue by aid of an acid (such as diluted muriatic acid), and remove
the separated ether from the acitulated water. By treating the so obtained ethers
of the naphthols or of the dioxynaphthaline with strong sulphuric acid at a lower
or higher temperature we obtain the ethers of the sulfonated naphthols or the
sulfonated dioxynaphthaline, the sodium salts of which in an ammoniacal solution
yield with the different aromatic diazocompounds a great variety of dye shades.
Having now described and particularly ascertained the nature of the said In-
vention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what is claimed as my Invention is,-
The preparation of dye-stuffs from the methyl-ethyl-amyl and similar ethers of
the naphtholmono and disulphonic acids, and also of the sulphonic acids of the
dioxynaphthaline by acting upon the same with the aromatic diazo or diazoamido-
compounds obtained from analine, toluidine, xylidine, and their methyl-ethyl-
amyl products, or from the amido-phenols, amido-phenol, amidokressol, and their
others, or from the aromatic amido-acids, say, the isomeric amidobenzoic acids, sub-
stantially as herein before described.
In witness whereof, I, the said Edward Thomas Hughes, have hereunto set
my hand and seal, this Twenty third day of September, in the year of
our Lord One thousand eight hundred and seventy nine.