Manufacture of Colouring Matters from Tetranitroanthrachrysone.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Manufacture of Colouring Matters from Tetranitroanthrachrysone.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, Chancery
Lane, 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 Ger-
many, Chemical Manufacturers) to be as follows:-
:-
My foreign correspondents have found that tetranitroanthrachrysone in an-aqueous
solution enters into reaction with aromatic amido-compounds by an exchange of
nitro-groups for the amido-residues thus forming valuable dyestuffs. Thus the
tetranitroanthrachrysone reacts in a manner similar to its reaction with the dinitro-
and dichlor-anthrachrysonedisulphonic acids as previously found by my corre.
spondents.
The dyestuffs obtained by heating tetranitroanthrachrysone in aqueous solution
with amido-compounds, such as for instance: aniline, toluidine, amidophenol,
toluylene-diamine, shew properties similar to those of the substances obtained from
dinitroanthrachrysonedisulphonic acid; compared with them, the new dyes have
darker tints and are distinguished by a greater fastness to, fulling:
The following example illustrates the new process 30 kilos. of tetranitroanthra-
chrysone are dissolved in 10 times the quantity of water and heated on the water
bath with 15 kilos. of aniline, soda being added, till the blue colour of the liquid no
longer increases in intensity. The dyestuff thus formed is separated from the
solution by means of salt. It dyes chrom-mordanted wool bluish-black; a similar
tint is obtained in an acid bath by subsequent treatment with chromium
fluoride.
Dated this 5th day of A 1000
ABEL & IMRAY,
Agents for the Applicant.
Manufacture of Colouring Matters from Tetranitroanthrachrysone.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, Chancery
Lane, 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
Price Ed.]

page_text: 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:-
My foreign correspondents have found that tetranitroanthrachrysone in an aqueous
solution enters into reaction with aromatic amido-compounds by an exchange of nitro-
groups for the amido-residues thus forming valuable dyestuffs. Thus the tetranitro-
anthrachrysone reacts in such a manner that there is an exchange of two nitro groups
for basic residues.
The dyestuffs obtained by heating tetra-nitro-anthrachrysone in aqueous solution
with amido-compounds, such as for instance: aniline, toluidine, amidophenol,
toluylene-diamine, shew dark tints and are distinguished by great fastness to
fulling.
The following example illustrates the new process:-30 kilos. of tetranitroanthra-
chrysone are dissolved in 10 times the quantity of water and heated on the water bath
with 15 kilos. of aniline, soda being added, till the blue colour of the liquid no longer
increases in intensity.
The dyestuff thus formed is separated from the solution by means of salt. It dyes
chrome-mordanted wool bluish-black; a similar tint is obtained in an acid bath by
subsequent treatment with chromium fluoride.
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 manufacture of dyestuffs of the anthrachrysone series by
heating tetranitroanthrachrysone or its salts in an aqueous solution with aromatic
amido-compounds.
2 The dyestuffs manufactured of above set farth