Improvements in the Manufacture of Basic Colouring Matters.
Year: 1896

page_text: Date of Application, 23rd May, 1896
Complete Specification Left, 23rd Feb., 1897-Accepted, 10th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Basic Colouring Matters.
We READ HOLLIDAY & SONS LIMITED, Chemical Manufacturers, of
Turnbridge, Huddersfield, in the County of York, and HARRY DEAN, Chemist
of the same place, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the manufacture of new basic colouring matters and
consists in the substitution of diamido-diphenyl-methane or the homologues thereof
or mixtures of these bases for aniline or its homologues in the well known processes
for the production of rosaniline blues, indulines or rosindulines.
We have found that any of the amido bases or other bodies that are transformed
into colouring matters such as rosaniline blues, indulines or rosindulines, by heating
them with aniline are also transformed into colouring matters when heated in a
similar manner with the methane bases above mentioned and that the colouring
matters so produced though somewhat similar in shade differ materially in their
properties, their hydrochlorides being more soluble in water, and possessing a
greater affinity for the cotton fibre than the corresponding colouring, matters made
with aniline.
The purification of the melt produced can be effected by treating it with dilute
hydrochloric acid and salting out the colour, the excess of methane bases remaining
in the liquor.
1000
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.
Improvements
Dasic
We READ HOLLIDAY & SONS LIMITED, Chemical Manufacturers, of
Turnbridge, Huddersfield, in the County of York, and HARRY DEAN, Chemist,
of the same place, 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 manufacture of new basic colouring matters and
consists in the substitution of diamido diphenyl methane, or the homologues
thereof, or mixtures of these bases for aniline or its homologues in the well known
processes for the production of rosaniline blues, indulines, or rosindulines.
We have found that any of the amido bases or other bodies that are transformed
into colouring matters such as rosaniline blues, indulines or rosindulines by heating
them with aniline are also transformed into colouring matters when heated in a
similar manner with the methane bases above mentioned and that the colouring
matters so produced though somewhat similar in shade differ materially in their
properties, their hydrochlorides being more soluble in water and possessing a greater

page_text: affinity for the cotton fibre than the corresponding colouring matters made with
aniline.
The purification of the melt produced can be effected by treating it with
dilute hydrochloric acid and salting out the colour, the excess of methane bases
remaining in the liquor.
The following examples will serve to show the method of carrying this invention
(or benzene azo alpha naphtylamine) are heated together at a temperature
of 160° C. until a sample dissolves in concentrated sulphuric acid with a green
colour. When this stage is reached the melt may be purified as in the preceeding
examples.
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 production of new colouring matters by substituting diamido diphenyl
methane or its homologues, or a mixture of these bases for aniline, or its
homologues in the processes used for the production of roşaniline blues, as set
forth.
2. The production of new colouring matters by substituting diamido diphenyl
methane, or its homologues, or a mixture of these bases for aniline, or its
homologues in the processes used for the production of indulines and rosindulines,
as set forth.
3. The new colouring matters produced as herein before described and as set
forth in the preceeding Claims 1 and 2.
Dated the 23rd day of February 1897:
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.