Manufacture of Colouring Matters.
Year: 1894

page_text: Date of Application, 22nd Feb., 1894
Complete Specification Left, 14th Nov., 1894-Accepted, 15th Dec., 1894
[Communicated from abroad by THE ACTIEN GESELLSCHAFT FÜR ANILIN
FABRIKATION, of Berlin, in the Empire of Germany, Chemical Manu-
facturers.]
Manufacture of Colouring Matters.
I, CHARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane
in the County of London, Consulting Engineer and Chartered Patent Agent, do
hereby declare the nature of this invention to be as follows:-
This invention relates to the production of azo-dyes derived from the new bases
and sulpho-acids described in the Provisional Specification No. 23310 dated
4th December 1893 and in an application for Letters Patent filed by me, bearing
equal date herewith, for "Manufacture of new bases and their sulpho-acids." My
foreign correspondents have discovered that the beforementioned substances which
may be collectively termed "amidotriazines" are well suited for the production of
valuable colouring matters.
The following are examples of amidotriazines which may be employed:
:

page_text: desired, in a weakly acid solution. The colouring matters obtained are, according
to their solubility, isolated in the form of salts or of free colour-acids.
Dated this 22nd day of February 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of Colouring Matters.
1, CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane
in the County of London Consulting Engineer and Chartered 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 production of azo-dyes derived from the new bases
and sulpho acids described in the Specification No. 23310 of 1893 and in the
Specification No. 3842 of 1894.
"
My foreign correspondents have discovered that the beforementioned substances
which may be collectively termed "amidotriazines' are well suited for the:
production of valuable colouring-matters.
The diazo and tetrazo bodies of the amidotriazines possessing a basic character
yield generally colouring matters soluble in water, only when combined with sulpho
acids; but the amidotriazines possessing acid groups, as for instance the sulpho
group, yield soluble colouring-matters on combination, with nonsulphonated
substances. It is not material whether in the latter case the sulpho group be
already contained in the chrysoïdines or whether it be introduced in the amido-
triazines by sulphonation.
The tinctorial properties of the new colouring matters depend partly on the
products which are combined with the amidotriazines, partly on the amidotriazines
employed. The influence which the amidotriazine exercises depends on the
chrysoidine used for its production. Amidotriazines in which a naphthaline nucleus
is contained yield colouring-matters of more dull and red tints than such amido-
triazines as contain only a benzene uucleus. A similar relation exists between the
last mentioned bodies and those containing the diphenyl nucleus.
The colouring-matters prepared by means of a chrysoïdine obtained from a
diamine such as benzidine, naphthylendiamine and the like and their sulpho acids,
have the property of dyeing not only wool but also unmordanted cotton. respect
of colour there is no great difference between the corresponding dyes obtained from
basic amidotriazines or from their sulpho acids.
The production of these colouring-matters is generally carried out in the
following manner :
1: 30 kilos. of the amidotriazine obtained by combining benzaldehyde with
diamidoazobenzene are diazotised with 7 kilos, of sodium nitrite. The diazo body
is added to an alkaline solution of 35 kilos. of the sodium salt of the 3-naphthul-
disulpho acid (R salt).
The colouring-matter thus formed separates in the form of a red precipitate,
which is filtered off, pressed and dried. It dyes wool in an acidulated bath
beautiful red tints. By substituting for the R salt other naphthol-sulpho acids or
dioxynaphthalinesulpho acids or amidonaphtholsulpho acids, colouring matters are
obtained which dye in tints varying from red to red violet.
11. 38 kilos. of the monosulpho acid, obtained by sulphonation of the amido-
triazine of the above example, are diazotised with 7 kilos. of sodium nitrite, the
diazo body is added to an alkaline solution of 14 kilos. of salicylic, acid. The
yellow colouring-matter is easily soluble, it is precipitated by acidulating the solution
"

page_text: and by adding common salt. The colouring-matter dyes mordanted or unmordanted
wool in yellow tints.
In an analogous manner, orange, red, red-brown and red-violet dyes are obtained
by substituting other components for the salicylic acid.
III 46 kilos of the disulnho anid of the amidotriazine of first example are
diazotised, the diazo body is added to an alkaline solution of 14 kilos. of B-naphthol.
The red-yellow colouring-matter is precipitated in a neutral, or weakly acid
solution by means of common salt.
In the same manner a great number of new colouring-matters may be prepared
by means of the amidotriazines and their sulpho-acids; and hereafter are mentioned
some of the amidotriazines, with which good results have been obtained in preparing
colouring-matters by means of them.
But my foreign correspondents wish to be understood that they do not limit
themselves to the employment of the particular amidotriazines herein mentioned as
the invention can be very generally applied.
The following are examples of amidotriazines which may be employed.
diazotised, the diazo body is added to an alkaline solution of 14 kilos. of B-naphthol.
The red-yellow colouring-matter is precipitated in a neutral, or weakly acid
solution by means of common salt.
In the same manner a great number of new colouring-matters may be prepared
by means of the amidotriazines and their sulpho-acids; and hereafter are mentioned
some of the amidotriazines, with which good results have been obtained in preparing
colouring-matters by means of them.
But my foreign correspondents wish to be understood that they do not limit
themselves to the employment of the particular amidotriazines herein mentioned as.
the invention can be very generally applied.
The following are examples of amidotriazines which may be employed.
sulphanilic acid and meta
naphtionic acid
Amido- nitraniline
phenylendiamine
toluylendiamine and benzaldehyde
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tri-
amidobenzoic acid
amidosalicylic acid
and
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amidosulphosalicylic acid and meta
their
"
"
azines
naphthylamine
benzidine
ور
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sulpho
derived diamidostilbenedisulpho acid m-
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naphthylendiaminesulpho acid
acids.
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from
benzidine salicylic
99
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aniline and m-
phenylendiamine
toluylendiamine
aniline
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and m-nitrobenzaldehyde
and acetaldehyde
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 new azo-colouring matters by combining
the diazo or tetrazo-bodies of the new amidotriazines at their sulpho acids with
phenols, amines, amidophenols and their sulpho or carbo-acids.
2. The products manufactured as above set forth.
Dated this 14th day of November 1894.