Improvements in the Manufacture of Colouring Matters.
Year: 1897

page_text: Date of Application, 3rd Mar., 1897
Improvements in the Manufacture of Colouring Matters.
I, HENRI RAYMOND VIDAL, of 95, Boulevard Beaumarchais, Paris, in the
Republic of France, Chemical Engineer, do hereby declare the nature of this inven-
tion 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 preparation of new colouring matters derived from
carboxylated compounds of the amido or hydroxylated tri-phenyl carbinols.
The improved colouring matters are of great vividness and act directly upon
animal fibres and dye mordanted cotton.

page_text: I heat to 100° C. for twelve hours in an enamelled cast iron cauldron provided
with an agitator. The operation is terminated when the slight ebullition which is
produced during the reaction has ceased and the mass becomes of a red blue very
vivid and very pure."
The product is exhausted with dilute hydrochloric acid and precipitated by an
alkali. It is then thrown upon a filter and dried.
The monosubstituted hydrazines are hydrazines substituted by a radical such as
phenyl, tolyl, xylyle, naphtyl or any other similar radical as for example:
Phenylhydrazine, naphtylhydrazine.
This is the explanation of the terms used: -
(1) T-phenyl-oxy-carbinol is tri-phenyl-methane para-mono-hydroxylated in
each of its nuclei. This body might also be called tri-phenol-carbinol.
(2) Tri-phenyl-amido-oxy-carbinol is tri-phenyl-methane para-mono-hydroxy-
lated in one nucleus, para-mono-amidated in the two remaining nuclei; or para-
mono-hydroxylated in two nuclei and para-monoamidated in the third.
(3) Tri-phenyl-amido-carbinol is tri-phenyl-methane para-mono-amidated in
each of its nuclei.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
(1) A process of marfufacture of colouring matters consisting in causing hydra-
zine or monosubstituted hydrazines to be acted upon with the co-operation of heat
by any one of the mono, di or tricar boxylated products of tri-phenyl-oxy-carbinol;
"ortho
the carboxyl being situated as
or meta in relation to the hydroxyle
group.
66
"
(2) A process of manufacture of colouring matters consisting in causing any one
of the mono, di or tri-carboxyle products of tri-phenyl-amidoxy carbinol to react
with the assistance of heat upon hydrazine or monosubstituted hydrazines; the car-
boxyl occupying the position of an ortho" or "
meta" relatively to the amido or
hydroxyle, or amido and hydroxyle groups.
"
(3) A process of manufacture of colouring matters consisting in causing hydra-
zine or monosubstituted hydrazines to be acted upon with the assistance of heat by
any one of the mono, di or tri carboxyle products of tri-phenyl-amido-carbinol; the
carboxyle occupying the position of an ortho" or meta relatively to the amido
group.
(4) A process of treatment of the products obtained by the process claimed in the
1st, 2nd and 3rd claims, consisting in exhausting them by means of dilute hydro-
chloric acid, precipitating them from their acid solution by means of an alkali, and
separating them by filtration.
(5) The colouring matters obtained by the processes hereinabove claimed, capable
of dyeing red both non-mordanted animal fibre and mordanted cotton.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
>