Improvements in the Production of New Blue Colouring Matters for Dyeing and Printing.
Year: 1895

page_text: Date of Application, 5th Feb., 1895
Complete Specification Left, 6th Nov., 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Production of New Blue Colouring Matters
for Dyeing and Printing.
We READ HOLLIDAY & SONS LIMITED of Upperhead Row, Huddersfield in
the County of York, Manufacturing Chemists, and ROBERT HOLLIDAY of the
same place, Managing Director of the said company, do hereby declare the nature
of this invention to be as follows:-
We have discovered that by treating rosaniline with paraphenylene-diamine and
aniline, soluble blue colouring matters are formed; the aniline can be replaced
by beta or alpha napthylamine or admixtures of the same.
To carry this invention into effect we heat together-say about 100 lbs.
rosaniline, 200 lbs. paraphenylene-diamine, 400 lbs. aniline and 5 lbs. benzoic or
other suitable organic acid at a temperature of say about 150° Centigrade; but
we do not confine ourselves to the exact and proportionate quantities: the
operation being continued until when a sample is taken out, dissolved in alcohol
and acetic acid, a drop of this solution on a piece of white filter paper shows the
blue colour desired. Successive samples treated in this manner should pass
through stages of reddish blue so as to give a green shaded blue.
The aniline may be replaced by alpha or beta napthylamine or the bodies may
be used admixed.
The quantities can be varied; a larger proportion of paraphenylene-diamine,
aniline and alpha or beta napthylamine will work quicker and give green
shades.
The larger the proportion of paraphenylene-diamine and the lower the
temperature the melt is worked at, the more soluble the colouring matter will be.
When the operation has reached the required shade it is cooled and sufficient
hydrochloric acid is added to make the melt properly dissolve in hot water. The
colour is then salted out and filtered, this can be repeated until the colour is free
from the amines used.
The colour can then be pressed and dried; or, if a very concentrated colour is
required it can be precipitated by alkali after salting out of the amines, then
filtered and all salt washed out.
Sufficient hydrochloric acid can be added afterwards to make it soluble.
The colour is then in a condition suitable for dyeing or printing.
1
1 3
Waha 1905
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.

page_text: Improvements in the Production of New Blue Colouring Matters
for Dyeing and Printing.
We READ HOLLIDAY & SONS LIMITED of Upperhead Kow, Huddersfield in
the County of York, Manufacturing Chemists, and ROBERT HOLLIDAY of the
same place Managing Director of the said company 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 :-
We have discovered that by treating rosaniline with paraphenylene-diamine and
aniline, soluble blue colouring matters are formed; the aniline can be replaced by
beta or alpha naphthylamine or admixtures of the same.
To carry this invention into effect we heat together-say about 100 lbs. rosaniline,
200 lbs. paraphenylene-diamine, 400 lbs. aniline and 5 lbs. benzoic or other
suitable organic acid at a temperature of say about 150° Centigrade; but we do
not confine ourselves to the exact and proportionate quantities. Instead of aniline
the same weight of a naphthylamine, ẞ naphthylamine or a mixture of them may
be used. The operation being continued until when a sample is taken out, dissolved
in alcohol and acetic acid, a drop of this solution on a piece of white filter paper
shows the blue colour desired.
Successive samples treated in this manner should pass through stages of reddish
blue so as to give a green shaded blue.
The aniline may be replaced by alpha or beta naphthylamine or the bodies may
be used admixed.
The quantities can be varied; a larger proportion of paraphenylene-diamine,
aniline and alpha or beta naphthylamine will work quicker and give green shades.
The larger the proportion of paraphenylene-diamine and the lower the
temperature the melt is worked at, the more soluble the colouring matter
will be.
When the operation has reached the required shade it is cooled and sufficient
hydrochloric acid is added to make the melt properly dissolve in hot water. The
colour is then salted out and filtered, this can be repeated until the colour is free
from the amines used.
The colour can then be pressed and dried; or, if a very concentrated colour is
required it can be precipitated by alkali after salting out of the amines, then
filtered and all salt washed out. Sufficient hydrochloric acid can be added
afterwards to make it soluble.
The colour is then in a condition suitable for dyeing or printing.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is.
1. The manufacture of colouring matters by the condensation of rosaniline and
paraphenylene-diamine with aniline, a naphthylamine, ẞ naphthylamine or a
mixture of the same and a suitable organic acid as hereinbefore described.
2. As new articles of manufacture the colouring matters as hereinbefore
described.
ted the 6th day of November 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.