Improvements in the Manufacture of Colouring Matters.
Year: 1897

page_text: Date of Application (in the United Kingdom), 13th Mar., 1897
Complete Specification Left, 13th Dec., 1897-Accepted, 5th Feb., 1898
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
invention to be as follows:-
By causing paramidophenol to act upon parasulphanilic acid I have obtained a
new blue colouring matter.
Example. I heat upon a bath of oil at about 170 degrees in an iron pot pro-
vided with an agitating device :
Parasulphanilic acid
Paramidophenol
-
17 300 Kilogrammes.
11 000 Kilogrammes.
The mass is liquefied and I obtain finally in from two to three hours' boiling
a very hard bluish black mass which by stopping the agitating device indicates
that the reaction is terminated.
The colouring matter thus obtained dyes directly cotton, in an alkaline bath,
in very rich blue tints.
In this reaction I may, with a view to obtaining analogous bodies, replace the
parasulphanilic acid by naphthionic acid or metasulphanilic acid.
If I replace the paramidophenol by orthoamidophenol I obtain a reddish black
colouring matter.
Example: I heat as in the first example.
Parasulphanilic acid
Orthoamidophenol
17 300 Kilogrammes.
11 000 Kilogrammes.
I obtain a reddish black mass soluble into black in alkalies and dyeing directly
cotton.
The substitution of metamidophenol for the orthoamidophenol gives a yellowish
brown colouring matter.
I may also replace the paramidophenol by amidonaphthol.
If in the reaction of the first example I replace the 11 kilogrammes of para-
midophenol by the same quantity of paraphenylenediamine I obtain a violet
colouring matter soluble in acids. In this reaction I add a certain quantity of
[Price 8d1

page_text: glycerine to form a pasty mass. The mixture of parasulphanilic acid and para-
phenylenediamine being scarcely fusible.
I may also replace the paraphenylenediamine by naphthylenediamine.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, E.C., Agents for the Applicant.
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
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 colouring matters.
By causing paramidophenol to act upon parasulphanilic acid I have obtained a
new blue colouring matter.
Example:
heat upon a bath of oil at from 170 to 250 degrees Centigrade in an
iron pot provided with an agitating device:
Parasulphanilic acid
Paramidophenol
17 300 Kilogrammes.
11 000 Kilogrammes.
The mass is liquefied and I obtain finally in from two to three hours' boiling
a very hard bluish black mass which by stopping the agitating device indicates
that the reaction is terminated.
The colouring matter thus obtained dyes directly cotton, in an alkaline bath,
in very rich blue tints.
In this reaction I may, with a view to obtaining analogous bodies, replace the
parasulphanilic acid by naphthionic acid or metasulphanilic acid.
If I replace the paramidophenol by orthoamidophenol I obtain a reddish black
colouring matter.
Example: I heat as in the first example.
Parasulphanilic acid
Orthoamidophenol
17'300 Kilogrammes.
11'000 Kilogrammes.
I obtain a reddish black mass soluble into black in alkalies and dyeing directly
cotton black.
The substitution of metamidophenol for the orthoamidophenol gives a yellowish
brown colouring matter soluble in alkalies and dyeing cotton directly black...
I may also replace the paramidophenol by amidonaphthol a, a
If in the reaction of the first example I replace the 11 kilogrammes of para-
midophenol by the same quantity of paraphenylenediamine I obtain a violet
colouring matter soluble in acids. In this reaction I add a certain quantity of
glycerine to form a pasty mass. The mixture of parasulphanilic acid and para-
phenylenediamine being scarcely fusible.
I may also replace the paraphenylenediamine by naphthylenediamine a, a,.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. A method of manufacturing a blue colouring matter consisting in causing

page_text: parasulphanilic acid to re-act upon paramidophenol at a heat varying between 170
and 250 degrees Centigrade.
2. The product obtained by the method ascertained in the first claim and con-
sisting in a blueish and very hard matter, dyeing, directly, cotton in an alkaline
bath in very rich blue tints.
3. A method of manufacturing colouring matters, consisting in causing naph-
thionic acid or metasulphanilic acid to react upon paramidophenol at a heat
varying between 170 and 250 degrees Centigrade.
4. A method of manufacturing a dark-reddish-black colouring matter consisting
in causing parasulphanilic acid to react upon orthoamidophenol at a heat varying
between 170 and 250 degrees Centigrade.
4. A method of manufacturing a dark-reddish-black colouring matter consisting
in causing parasulphanilic acid to react upon orthoamidophenol at a heat varying
between 170 and 250 degrees Centigrade.
5. The product obtained by the method ascertained in the fourth claim and con-
sisting in a dark-reddish-black dissolving into black in the presence of alkalies
and dyeing cotton directly black.
G. A method of manufacturing a dark-yellowish-brown colouring matter con-
sisting in causing parasulphanilic acid to react upon metamidophenol at a heat
varying between 170 and 250 degrees Centigrade.
7. The product obtained by the method ascertained in the sixth claim, and con-
sisting in a dark-yellowish-brown matter, soluble in alkalies and dyeing cotton
directly black.
Dated his out day of December 105.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.