Manufacture of Dyestuffs from Dinitroanthrachrysone.
Year: 1899

page_text: Date of Application, 5th Jan., 1899
Complete Specification Left, 20th Sept., 1899-Accepted, 21st Oct., 1899
PROVISIONAL SPECIFICATION.
Manufacture of Dyestuffs from Dinitroanthrachrysone.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by The Farbwerke vormals: Meister
Lucius and Brüning, of Hoechst a/Main, in the Empire of Germany, Chemical
Manufacturers) to be as follows:-
In the Specification No. 9506 of 1898 is described a method by which it is possible
to bring tetranitroanthrachrysone in aqueous solution into reaction with aromatic
bases, when an exchange of nitro-groups for aromatic residues takes place,
Further experiments have shewn, that dinitroanthrachrysone, related in its
constitution to tetranitroanthrachrysone, is a suitable primary material for a series of
new valuable dyestuffs.
It is also possible with this compound to direct the reaction in aqueous solution
with aromatic bases in such a manner that only an exchange of the two nitro-groups
for basic residues takes place; in this case the reaction differs strictly from that
described in the Specification No. 23927 of 1894 which relates to the exchange of
hydroxyls for aromatic bases.
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page_text: COMPLETE SPECIFICATION.
Manufacture of Dyestuffs from Dinitroanthrachrysone.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by The Farbwerke vorinals Meister
Lucius and Brüning, of Hoechst a/Main, in the Empire of Germany, Chemical
Manufacturers) 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 No. 9506 of 1898 is described a method by which it is possible
to bring totranitroanthrachrysone in aqueous solution into reaction with aromatic
bases, when an exchange of nitro-groups for aromatic residues takes place.
Further experiments have shewn that dinitroanthrachrysone, related in its
constitution to tetranitroanthrachrysone, is a suitable primary material for a series
of new valuable dyestuffs.
It is also possible with this compound to direct the reaction in aqueous solution with
aromatic bases in such a manner that only an exchange of the two nitro groups for
basic residues takes place; in this case the reaction differs strictly from that
described in the Specification No. 23,927 of 1894 which relates to the exchange of
hydroxyls for aromatic bases.
Dinitroanthrachrysone
+ aniline
Dinitroanthrachrysone
+ ortho-tolaidine
Dinitroanthrachrysone
+ para-toluidine
Dinitroanthrachrysone
+ para-amido-
phenol
Dinitro uthrachrysone
+ ortho-amido-

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein-described inanufacture of dyestuffs of the anthrachrysone series by
heating dinitroanthrachrysone or its salts in an aqueous solution with aromatic
amido-compounds.
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