Year: 1898

page_text: Date of Application, 16th Sept., 1898
Complete Specification Left, 13th June, 1899-Accepted, 15th July, 1899

page_text: By concentrated sulphuric acid, it is dissolved with a yellow color, which color,
after a time, changes into red, and then into blue. If the sulphuric acid solution is
heated the color is changed more quickly. The coloring matter dyes unmordanted
wool, in acid baths, blue shades.
DYE-STUFF "B."
When obtained as above described, it represents a dark-blue precipitate, soluble
with difficulty in cold water, more easily soluble in hot water, with a blueish-
green color, which changes into green, on the addition of alkalies. By concentrated
sulphuric acid, it is dissolved with a yellow color. The dye-stuff yields on unmor-
danted wool, in acid baths, greenish-blue shades.
DYE-STUFF C."
This is readily soluble in water with a pure blue color. By a concentrated
sulphuric acid, it is dissolved with a yellow color, which changes into green on the
addition of boric acid. The coloring-matter dyes unmordanted wool, in acid baths,
bright greenish-blue shades.
If the aniline used in the example is replaced by para-toluidine, an analogous
result is obtained. On using orthotoluidine and metaxylidine, the easily soluble dye-
stuffs "C" are obtained as principal products of the reaction.
If, instead of the paradinitro-anthrarufine disulphonic acid, paradinitrochrysazine
disulphonic acid is employed, nearly exclusively, dyestuffs are obtained which are
easily soluble in water, and yield very bright shades on uninordanted wool.
My foreign correspondents wish it to be understood that they do not intend to
confine themselves to the particulars given in the example, as this is merely typical,
and can be varied within wide limits, without altering thereby the nature of the
present invention.
Dated this 16th day of Sontember 1808
NEWTON & SON,
Agents for the Applicant.
The Manufacture or Production of Blue to Blueish-green Dye-stuffs
of the Anthraquinone Series.
I, HENRY EDWARD NEWTON, of the Office for Patents, 6, Bream's Buildings,
Chancery Lane, in the County of London, Patent Agent, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
In the Specification to Letters Patent No. 2392794, my foreign correspondents have
described the production of blue dye-stuffs by the action of primary aromatic mono-
amido or diamido compounds, or paradinitro anthrarufine.
My foreign correspondents have now found that a new series of dye-stuffs is
obtained if, instead of paradinitro anthrarufine, paradinitro anthrarufine disulphonic
acid, or paradinitro chrysazine disulphonic acid [described in the Specification of
Letters Patent No. 120117], are allowed to act on the above defined amido com-
pounds. These new coloring matters dye unmordanted wool, in acid baths, from
blue to blueish-green shades. They are also capable of dyeing chrome-nordanted
wool.
In order to produce the new dyestuffs, it is, in general, not necessary to raise
the temperature of the reaction inixture above from 90 to 100 degrees Centigrade.

page_text: This is readily soluble in water with a pure blue color. By concentrated sulphuric
acid it is dissolved with a yellow color, which changes into green on the addition of
boric acid. The coloring-matter dyes unmordanted wool, in acid baths, bright
greenish-blue shades.
In the aniline used in the example is replaced by paratoluidine, an analogous result
is obtained. On using orthotoluidine and metaxylidine, the easily soluble dye-
stuffs "C" are obtained as principal products of the reaction.
If, instead of the paradinitro anthrarufine disulphonic acid, paradinitro chrysazine
disulphonic acid is employed, nearly exclusively, dyestuffs are obtained which are
easily soluble in water, and yield very bright shades on unmordanted wool.
My foreign correspondents wish it to be understood that they do not intend to
confine themselves to the particulars given in the example, as this is merely typical,
and can be varied within wide limits, without altering thereby the nature of the
present invention.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed (as communicated to
me from abroad), I declare that what I claim is :-
1. The improvement in the process claimed in the third claim of Letters Patent

page_text: No. 23927 of 1894, which improvement consists in allowing, instead of the nitro
compounds mentioned in the said claim, para dinitroanthrarufine disulphonic acid, or
para dinitro chrysazine disulphonic acid, to act on primary mono-amido or diamido
compounds, substantially as herein before described.
2. As new articles of manufacture, the new dye-stuffs obtainable according to the 5
process hereinbefore described and claimed.
C
1000