Manufacture of Blue Colouring Matters.
Year: 1888

page_text: [Communicated from abroad by THE ACTIEN GESELLSCHAFT FÜR ANILIN FABRIKATION,
of Berlin, in the German Empire, Manufacturing Chemists.]
Manufacture of Blue Colouring Matters.
1, CHARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane in
the County of Middlesex, Consulting Engineer and Patent Agent do hereby declare
the nature of this invention to be as follows:-
This invention relates to the manufacture of new blue coloring matters suitable as
dye-stuffs by combining tetrazodiphenyle, tetrazoditolyle, tetrazostilbene, or the
methyl- or ethyl-ether of tetrazodiphenol with the new alphanaphtholdisulphonic
acid described in the Specification to Patent application 462588. The colouring
matters thus obtained differ from the similar dye-stuffs at present in trade, partly by
giving clearer shades and partly by dyeing cotton more evenly and with greater
intensity.
The following example will explain the process.
COLORING MATTER FROM DIAMIDOSTILBENE AND THE NEW ALPHANAPHTHOL-
DISULPHONIC ACID.
21 Kilos of diamidostilbene are dissolved by means of 58 Kilos of muriatic acid
and 1000 litres of water, and are then converted into the hydrochlorate of tetrazo-
stilbene by adding slowly a solution of 14 Kilos of nitrite of sodium in 50 litres of
water. The tetrazo compound formed is then entered into a solution of 35 Kilos
of the dried sodium salt of the new alphanaphtholdisulphonic acid and 41 Kilos of
acetato of sodium in 1000 litres of water.
Tbus an intermediate product is obtained which consists of one molecule of tetrazo-
stilbene and one molecule of alphanaphtholdisulphonic acid. This intermediate
product is entered into an alkaline solution of a second molecule or 35 Kilos of the

page_text: new alphanaphtholdisulphonic acid. After the mixture of the components has stood
for some hours, it is heated and the formed coloring matter is separated by means of
common salt and is filtered pressed and dried.
It dyes cotton with bluish-violet shades in a bath of sulphate of sodium without the
use of a mordant.
In the above described example the naphtholdisulphonate of sodium, which is com-
bined with the intermediate product of tetrazostilbene and the new naphtholdisulphonic-
acid may be replaced by salts of other naphtholdisulphonic acids, also by salts of
alpha and betanaphthol and alpha- and betanaphthol monosulphonic acids. The
coloring matters thus obtained also dye cotton with bluish-violet shades without the
use of a mordant.
Further in the first example the diamidostilbene may be replaced in all cases by
equivalent quantities of diamido-stilbenesulphonic acid, benzidine, ortho-toluidine or
dianisidine.
If dianisidine is used, very clear shades are obtained. Some of these coloring
matters dye cotton with much greener shades than can be obtained by using the
similar dye-stuffs which have hitherto been brought on the market.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane in
the County of Middlesex, Consulting Engineer and 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 :-
-
This invention relates to the manufacture of new blue coloring matters suitable as
dye-stuffs by combining tetrazodiphenyle, tetrazoditolyle, tetrazostilbene, or the
methyl or ethyl ether of tetrazodiphenol with the new alphanaphtholdisulphonic acid
described in the Specification to Patent application 462588. The coloring matters
thus obtained differ from the similar dye stuffs at present in trade, partly by giving
clearer shades and partly by dyeing cotton more evenly and with greater intensity.
The following example will explain the process.
COLORING MATTER FROM DIAMIDOSTILBENE AND THE NEW ALPHANAPHTHOL-
DISULPHONIC ACID.
21 kilos of diamidostilbene are dissolved by means of 58 kilos of muriatic acid
and 1000 litres of water, and are then converted into the hydrochlorate of tetrazo-
stilbene by adding slowly a solution of 14 kilos of nitrite of sodium in 50 litres of
water. The tetrazo compound formed is then entered into a solution of 35 kilos of
the dried sodium salt of the new alphanaphtholdisulphonic acid and 41 kilos of acetate of
sodium in 1000 litres of water.
Thus an intermediate product is obtained which consists of one molecule of tetrazo-
stilbene and one molecule of alphanaphtholdisulphonic acid. This intermediate
product is entered into an alkaline solution of a second molecule or 35 kilos of the
new alphanaphtholdisulphonic acid. After the mixture of the components has stood
for some hours, it is heated and the formed coloring matter is separated by means of
common salt and is filtered pressed and dried.
It dyes cotton with bluish-violet shades in a bath of sulphate of sodium without
the use of a mordant.
In the above described example the naphtholdisulphonate of sodium, which is com-
bined with the intermediate product of tetrazostilbene and the new naphtholdi-
sulphonic acid may be replaced by salts of other naphtholdisulphonic acids, also by
salts of alpha and betanaphthol and alpha and betanaphtholmonosulphonic acids. The
coloring matters thus obtained also dye cotton with bluish-violet shades without the
use of a mordant.
Further in the first example the diamidostilbene may be replaced in all cases by
equivalent quantities of diamidostilbenesulphonic acid, benzidine, ortho-tolidine,
dianisidine, or diphenitidine

page_text: If dianisidine is used, very clear shades are obtained. Some of these coloring matters
dye cotton with much greener shades than can be obtained by using the similar dye-
stuffs which have hitherto been brought on the market.
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 :-
A new manufacture of azo coloring matters which dye on cotton bluish shades
without the use of a mordant, the said coloring matters being produced by first com-
bining one molecule of the new alphanaphtholdisulphonic acid described in the Specifi-
cation to Patent No. 462588 with one molecule of the tretrazo compound of benzidine,
tolidine, dianisidine diphenitidine or diamidostilbene, and by afterwards acting with
the products thus obtained upon naphthol or naphtholsulphonic acid, substantially as
herein described.
411 1
م
T
1000
ABEL & IMRAY,
Agents for the Applicant.