The manufacture and Production or NOW Azo Colouring-matters.
Year: 1899

page_text: The manufacture and Production or NOW Azo Colouring-matters.
I, JAMES YATE JOHNSON, of 47, Lincoln's Inn Fields, in the County of London,
Gentleman, do hereby declare the nature of this invention (which has been com-
municated to me from abroad by the Badische Anilin & Soda Fabrik, of Ludwig-
shafen-on-Rhine, in the German Empire) to be as follows.-
In the Specification of Letters Patent 7713 of 1891 granted to me on a com-
munication from my foreign correspondents there is described the production of
disazo dyes from diazo compounds and certain mono-sulphoacids of 11'-amido-
naphthol.
The present invention relates to the manufacture of tusazo dyes from the
said amido-naphtol-sulphoacids, namely from the oxy-naphthylamine-sulphoacid
(NH, OH: SU,H = 1; 1¹: 4) and the amido-naphthol-sulphoacid (NH,. OH:
SO,H=1:1: 4).
1
The sulphoacid used is combined with one molecular proportion of di-azo aul-
phanilic acid and one molecular proportion of diazo-azo-benzene, oi diazo-azo-
toluene The new colouring-matters thus obtained possess the good general
qualities of those described in the Specification of the said Letters Patent No.
7713 of 1891, and are further characterised by an excellent degree of fastness
against the action of light and the effects of washing The following example
will serve to further illustrate the nature of the invention but the invention 18
not confined to the example. The parts are by weight.
EXAMPLE.
Fist prepare the mono-azo-dyestuff obtained by the combination of sulphanilio
acid with oxy-naphthylamine-sulphoacid in acid solution in the well known way,
using, say, one hundred and ninety-five parts of pure and dry sodium sulphanilate
and two hundred and thirty-nine parts of the pure oxy-naphthylamine sulpho-
acid. Dissolve the said mono-azo dyestuff in water, with the aid of four hundred
and eighty parts of calcined soda Stir the solution well and whilst stiring,
run in a solution of diazo-azo-benzene which can be obtained, in the well-known
way, from one hundred and ninety seven parts of amido-azo-benzene, four hundred
and fifty parts of hydrochloic acid (containing about thirty two per cent. H Cl.)
and seventy five parts of sodium nitiite. The new t1188zo-dye forms quickly
Warm the mixture, and add common salt to complete the precipitation of the
colouring matter Collect by filtration, and work up in any suitable, or well
known, way.
Instead of the amido-azo-benzene prescribed in the example the corresponding
quantity of amido-azo-toluene, can be employed and homologous coloung
matter be obtained. Similar results are also obtained when using the other
amido-naphthol-sulphoacid herein before mentioned.

page_text: The new colouring-matters dye wool black from the acid-bath, and have special
value owing to the characteristics hereinbefore mentioned.
Dated this 6th day of November 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W C., Agents.
The Manufacture and Production of New Azo Colouring-matters.
I, JAMES YATE JOHNSON, of 47, Lincoln's Inn Fields, in the County of London,
Gentleman, do hereby declare the nature of this invention (and has been com-
municated to me from abroad by the Badische Anılın & Soda Fabrik, of Ludwig-
shafen on Rhine, in the German Empire) and in what manner the same 18 to
be performed to be particularly described and ascertained in and by the following
statement:-
:
=
=
1:11:4).
In the Specification of Letters Patent No. 7713 of 1891 granted to me on a com-
munication from my foreign correspondents there is described the production of
disazo dyes from diazo compounds and certain mono-sulphoacids of 11'-amido-
naphthol. The present invention relates to the manufacture of trisazo dyes from
the said amido-naphthol-sulpho acid (NH, OH: SO,H 1: 1. 4) and the oxy-
naphthylamine sulphoncid (NH, OH: 80,H:
The sulphoacid used is combined with one moleculai proportion of di-azo-sul-
phanilic acid and one molecular proportion of diazo-azo-benzene, or diazo-azo-
toluene. The new colouring-matters thus obtained possess the good general
qualities of those described in the Specification of the said Letters Patent No
7713 of 1891, and are further characterised by an excellent degree of fastness
against the action of light and the effects of washing
The following example will serve to further illustrate the nature of the inven-
tion and the manner in which it may be carried into practical effect but the
invention is not confined to this example. The parts are by weight
EXAMPLE
First prepare the mono-azo dyestuff obtained by the combination of sulphanilic
acid with oxy-naphthylamine-sulphoacid in acid solution in the well known way,
using, say, one hundred and ninety-five parts of pure and diy sodium sulphanilate
and two hundred and thirty-nine parts of the pure oxy-naphthylamine sulpho-
acid. Dissolve the said mono-azo dyestuff in water, with the aid of four hundred
and eighty parts of calcined soda. Stir the solution well and whilst stirring,
un in a solution of diazo-azo-benzene which can be obtained, in the well known
way, from one hundred and ninety-seven parts of amido-azo-benzene, four hundred
and fifty parts of hydrochloric acid (containing about thirty two per cent H Cl.)
and seventy five parts of sodium nitrite. The new tiisazo dye forms quickly
Waim the mixture, and add common salt to complete the precipitation of the
colouring matter. Collect by filtration, and work up in any suitable, or well
known, way.
Instead of the amido-azo-benzene prescribed in the example the collesponding
quantity of amido-azo-toluene, can be employed and homologous colouring
matter be obtained. Similar results are also obtained when using the other
amido-naphthol-sulphoacid herein before mentioned The new colouring matters
dye wool black from the acid bath, and have special value owing to the
characteristics herein before mentioned.

page_text: Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:
1. The manufacture of trisazo dyes from either of the amido- naphthol sulpho-
acids hereinbefore mentioned, by combining it with a diazo compound of "sul-
phanilic acid in acid solution, and then combining the mono-azo dye thus
obtained with the diazo compound from amido-azo-benzene, or from amido-azo-
toluene, substantially as hereinbefore described.
2 The manufacture of new azo colouring matters substantially as described in
the foregoing example.
3 As new products the trisazo colouring matters such as can be obtained as
hereinbefore described and claimed.
T
1
MɅ1
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, WC., Agents.