Process for the Production of Azo Colouring Matters.
Year: 1887

page_text: Date of Application, 1st Sept., 1887
Complete Left, 26th May, 1888
Complete Accepted. 29th June, 1888
Process for the Production of Azo Colouring Matters.
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 to be as follows:-
According to this invention those substantive cotton-dyes which are formed by
the combination of tetrazo-diphenyle, tetrazo-ditolyle, tetrazodianisol, tetrazodiphenetol,
tetrazostilbene or tetrazostilbene-disulpho acid, with a- or ẞ naphthylamine or their
mono- or di-sulpho-acids, are converted into new colouring matters of a more bluish
shade by means of Iodide of methyle and its homologues or of the respective chlorine-
or bromine-alkyles. This method may be used not only with the colors formed by
combination of one molecule of the tetrazo-compound with two molecules of the
same naphthylamine or naphthylamine sulpho-acid but also with the mixed azo-
colours.
The reaction takes place in the best way in an alcoholic solution with or without
an addition of alkalies, and is completed by boiling with ascendant condenser if
halogene-alkyles of a high boiling point are used, and by boiling for some hours
in an autoclave if halogene-alkyles of a low boiling point are used.
When the
reaction is finished the new colours are dissolved in water, and, after evaporating
the alcohol, are precipitated by common salt.
These colouring matters all dye cotton in much bluer shades than the original
colours.

page_text: ascendant-condenser. While boiling, an alcoholic solution of 2 kilos of caustic soda
is gradually added. The product thus obtained is diluted with water, and after
evaporation of the alcohol the colour is separated in the usual way by precipitating
by means of salt.
It dves cotton with a fine bluish red shade

page_text: COMPLETE SPECIFICATION.
Process for the Production of Azo Colouring Matters.
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 :-
According to this invention those substantive cotton-dyes which are formed by
the combination of tetrazo-diphenyle, tetrazo-ditolyle, tetrazo-dianisol, tetrazo-
diphenetol, tetrazostilbene, or tetrazostilbene-disulpho-acid with a- or 3 naphthylamine
or their mono- or di-sulpho acids, are converted into new colouring matters of a
more bluish shade by means of Iodide of methlyle and its homologues or of the
respective chlorine-or-bromine alkyles.
This method may be used not only with the colours formed by combination of
one molecule of the tetrazo compound with two molecules of the same naphthylamine
naphthylamine-sulpho-acid but also with the mixed azo-colours.
or
The reaction takes place in the best way in an alcoholic solution with or without
an addition of alkalies, and is completed by boiling with ascendant condenser if
halogene alkyles of a high boiling point are used, and by boiling for some hours
in an autoclave if halogene alkyles of a low boiling point are used.
When the
reaction is finished, the new colours are dissolved in water, and, after evaporating
the alcohol, are precipitated by common salt.
These colouring matters all dye cotton in much bluer shades than the original
5 Kilos of the colour derived from tetrazo-ditolyle and Brönner's ẞ naphthylamine-
sulpho acid (known in the market under the name of Benzopurpurine B), 50 litres
of alcohol, and 6 kilos of Iodide of methyle are boiled for 5 hours by using an
ascendant condenser. While boiling, an alcoholic solution of 2 kilos of caustic soda
is gradually added. The product thus obtained is diluted with water, and after
evaporation of the alcohol the colour is separated in the usual way by precipitating
by means of salt.
TL
£ hluich and chada
EXAMPLE 11.
A colour very similar to the foregoing is obtained if the benzopurpurine B
mentioned in Example I is replaced by the mixed colour derived from tetrazo-
ditolyle, naphthylamine-disulpho acid and Brönner's ẞ naphthylamine-mono-sulpho-
5 acid.

page_text: EXAMPLE III.
20 kilos of the colour obtained by the combination of tetrazo-ditolyle with
8-naphthylamine-sulpho-acid which is known in the market under the name of
Delta-Purpurine 5 B are heated at 100° Cent. in an autoclave for 10 hours,
together with 300 litres of alcohol and 25 kilos of Iodide of methyle and an
addition of 17 kilos of carbonate of lime. After cooling, the colour is separated
in the same way as described in Example I.
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 :-
a
Process for the production of azo colouring matters wherein the colouring matters
produced by the combination of tetrazo-diphenyle, tetrazo-ditolyle, tetrazo-dianisol,
tetrazodiphenetol, tetrazostilbene or tetrazostilbene-disulpho-acid with or B
naphthylamine or their mono or disulpho acids, are converted into their alkyl
derivatives by means of Iodide of methyle, Bromide of methyle or chloride of
methyle or their homologues.