Manufacture of Black Disazo-colouring Matters.
Year: 1899

page_text: Date of Application, 2nd Feb., 1899
Complete Specification Left, 9th Oct., 1899-Accepted, 18th Nov,, 1899
PROVISIONAL DI LUIT TON
Manufacture of Black Disazo-colouring Matters.
I, CHARLES DENTON ABEL, of Birkbeck Bank Chambers, Southampton Buildings, in
the County of London, Consulting Engineer and Chartered Patent Agent, do hereby
declare the nature of this invention (as communicated to me from abroad by The
Actien Gesellschaft für Anilin Fabrikation of Berlin, in the Empire of Germany,
Chemical Manufacturers,) to be as follows:-
In the Specification No. 24527 of 1897 is described a process for the manufacture
of black disazo-colouring matters by combining the diazo-compounds of paraatnidodi-
phenylamine-sulphonic acids with a-naphthylamine, again diazotising the amidoazo-
products thus obtained and finally coupling with naphthols or naphtholsulphonic
acids.
My foreign correspondents have now found that colouring matters of similar
character can be obtained by using as starting products, instead of the paraamido-
diphenylamine-sulphonic acids and their homologues either contain other substitu-
tion products of these acids, or substituting for these derivatives of paraamido-
diphenylamine certain sulpho-acids derived from paraamidophenyl-ẞ-naphthylunine.
Thus there are obtained black disazo-colouring matters of great technical value by
using as first components in the process above described either
1) The sulpho-acids obtained by the action of paranitrochlorbenzeneorthosulphonic
acid on one of the following amido-products: ortho-, para- or meta-chloraniline,
acetyl-para-phenylene-diamine, meta-anido-para-cresol ether, and thereupon reducing
the products thus formed.
2) The sulpho-acids of para-amidophenyl-3-naphthylamine obtained by first reacting
with para-nitrochlorbenzenesulphonic acids on B-naphthylamine or its sulpho-acids
and then reducing the condensation products forined.
The process for the production of the new black disazo-colouring matters derived
from the said starting products is quite analogous to the process described in the
Specification No. 24527 of 1897 above referred to. The new colouring matters like-
wise resemble those obtained by means of the para-amidodiphenylamine-sulphonic
acids.

page_text: declare the nature of this invention (as communicated to me from abroad by The
Actien-Gesellschaft für Anilin Fabrikation of Berlin, 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. 24,527 of 1897. is described a process for the manufacture
of black disazo-colouring matters by combining the diazo-compounds of para-amido-
diphenylamine-sulphonic acids with a-naphthylamine, again diazotising the amido-
azo-products thus obtained and finally coupling with naphthols or naphtholsulphonic
acids.
My foreign correspondents have now found that colouring matters of similar
character can be obtained by using as starting products, instead of the para-amido-
diphenylamine-sulphonic acids and their homologues either certain other substitu-
tion products of these acids, or substituting for these derivatives of para-amido-
diphenylamine certain sulphonic acids derived from para-amidophenyl-ẞ-naphthyl-
amine.
Thus there are obtained black disazo-colouring matters of great technical value by
using as first components in the process above described, either:-
(1) The sulphonie-acids obtained by the action of paranitrochlorobenzeneortho-
sulphonic acid on one of the following amido-products: ortho- para- or meta-
chloraniline, acetyl-para-phenylene-diamine, meta-amido-para-cresol ether and
reducing the products thus formed.
(2) The sulphonic acids of para-amido-phenyl-ẞ-naphthylamine obtained by first
reacting with para-nitrochlorobenzenesulphonic acids on B-naphthylamine or its
sulphonic acids and then reducing the condensation products formed.
The process for the production of the new black disazo-colouring matters derived
from the said starting products is quite analogous to the process described in the
Specification No. 24,527 of 1897 above referred to. The new colouring matters like-
wise resemble those obtained by means of the para-amidodiphenylamine-sulphonic
acids.
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 black disazo-colouring matters by com-
bining the diazo-compounds of the substituted para-amidodiphenylaminesulphonic
acids, or of the para-amidophenyl-6-naphthylaminesulphonic acids, herein referred
to, with a-naphthylamine, diazotising the intermediate product thus obtained and
finally coupling it with naphthols or naphtholsulphonic acids.
2. The colouring matters manufactured as above set forth.