Manufacture of Colouring Matters of the Induline Series.
Year: 1894

page_text: Date of Application, 9th Apr., 1894
.
Complete Specification Left, 29th Dec., 1894-Accepted, 2nd Feb., 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE ACTIEN GESELLSCHAFT FÖR ANILIN
FABRIKATION, of Berlin, in the Empire of Germany, Chemical
Manufacturers.]
Manufacture of Colouring Matters of the Induline Series.
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:-
The invention relates to the manufacture of colouring matters of induline kind
by means of the tetra amidodiphenylparazo-phenylen described by Bandrowsky
(Ber. d. Deutsch. Chem. Ges. XXVII p. 480).
My foreign correspondents have discovered that this product, when heated with
aromatic amines and their salts, yields valuable induline dyes.
According to the amine employed and the conditions under which the process is
carried out, dyestuffs may be produced which are more or less soluble in water or
dilute acids and which dye cotton mordanted with tannin violet to blue tints.
Generally, dyes more blue in tint and less soluble in dilute acids are formed if the
reaction is carried out at a higher temperature or with an excess of amine and
amine salt, or if the duration of the reaction is extended.
The following are examples illustrating the manner in which the manufacture
may be carried on, but without limiting the process to the precise details
described.
I. 20 kilos. tetra amidodiphenylparazophenylen, 40 kilos. aniline and 8 kilos.
hydrochlorate of aniline are heated for about 4 or 5 hours at 170° to 180° C. The
melt when cooled is introduced into water, a sufficient quantity of alkali is added
and the excess of aniline is distilled off with steam. The free dyestuff base obtained
is afterwards transformed into a salt by treatment with dilute acids; the salts are
for the most part soluble in dilute mineral acids and the base is very readily
soluble in concentrated acetic acid. This latter property renders the new induline
dye especially suitable for printing; it produces on cotton, mordanted with tannin
indigo like tints.
II. 20 kilos. tetra amidodiphenylparazophenylen, 40 kilos. a naphthylamine and
11 kilos. hydrochlorate of a naphthylamine are heated for about 4 hours at 130° C.;
the melt, after cooling, is dissolved in boiling water on the addition of hydrochloric
acid, and the colouring matter is precipitated from the filtered solution by means of
salt. It dyes cotton mordanted with tannin a red violet tint.
The products of these processes and especially those products which are not
soluble in dilute acids, may be converted into sulpho acids by treating them with
sulphonating agents.
Dated this 9th day of April 1894.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Manufacture of Colouring Matters of the Induline Series.
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 :-
The invention relates to the manufacture of colouring matters of induline kind
by means of the tetra amidodiphenylparazo-phenylen described by Bandrowsky
(Ber. d. Deutsch. Chem. Ges. XXVII p. 480).
My foreign correspondents have discovered that this product, when heated with
aromatic amines and their salts, yields valuable induline dyes.
According to the amine employed and the conditions under which the process is
carried out, dyestuffs may be produced which are more or less soluble in water or
dilute acids and which dye cotton mordanted with tannin violet to blue tints.
Generally, dyes more blue in tint and less soluble in dilute acids are formed if the
reaction is carried out at a higher temperature or with an excess of amine and
amine salt, or if the duration of the reaction is extended.
The following are examples illustrating the manner in which the manufacture may
be carried on, but without limiting the process to the precise details described.
1. 20 kilos. tetra amidodiphenylparazophenylen, 40 kilos. aniline and 8 kilos.
bydrochlorate of aniline are heated for about 4 or 5 hours at 170° to 180° C. The
melt when cooled is introduced into water, a sufficient quantity of alkali is added
and the excess of aniline is distilled off with steam. The free dyestuff base obtained
is afterwards transformed into a salt by treatment with dilute acids; the salts are
for the most part soluble in dilute mineral acids and the base is very readily
soluble in concentrated acetic acid. This latter property renders the new induline
dyc especially suitable for printing; it produces on cotton, mordanted with tannin,
indigo like tints. -
II. 20 kilos. tetra amidodiphenylparazophenylen 40 kilos. a naphthylamine and
11 kilos. hydrochlorate of a naphthylamine are heated for about 4 hours at 130° C.;
the melt, after cooling, is dissolved in boiling water on the addition of hydrochloric
acid, and the colouring matter is precipitated from the filtered solution by means
of salt. It dyes cotton mordanted with tannin a red violet tint.
The products of these processes and especially those products which are not
soluble in dilute acids, may be converted into sulpho acids by treating them with
sulphonating agents.
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 colouring matters of the induline series
by heating tetra-amidodiphenylpara-azo-phenylene with aromatic amines and their
salts.
2. The transformation of products, obtained as above set forth, which are not
soluble in dilute acids, into sulpho acids, by treating them with sulphonating
agents.
3. The products manufactured as set forth in the preceding claims.
Dated this 28th day of December 1894.
ABEL & IMRAY,
Agents for the Applicant.