Process for the Production of Red Tints by Combining on the Fibre Para-nitraniline with Mixtures of Beta-naphthol and its Sulphonic Acids.
Year: 1894

page_text: Date of Application, 6th Sept., 1894
Complete Specification Left, 6th June, 1895-Accepted, 6th July, 1895.
PROVISIONAL SPECIFICATION..
[Communicated from abroad by THE FARBWERKE, vormals MEISTER Lucius
AND BRUNING, of Hoechst a/ Main, in the Empire of Germany, Chemical
Manufacturers.]
Process for the Production of Red Tints by Combining on the
Fibre Para-nitraniline with Mixtures of Beta-naphthol and its
Sulphonic Acids.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
Since para-nitrauiline came to be employed for dyeing and printing cotton goods,
efforts have been made to produce tints as blue as possible besides the scarlet red
tint obtained from beta-naphthol.
The introduction of other nitro-bases, for instance ortho-nitro-para-phenetidine,
had no remarkable success in consequence of the expense, and for other reasons.
My foreign correspondents have found that it is possible to attain the desired
end, without injury to the other colours and without much increase of cost, by
adding small quantities of the sodium salt of beta naphthol-sulphonic acid 2:7
(the F sulphonic acid of the German Patent No. 42112) to the solution of sodium
naphtholate which is employed for preparing the goods. With 5 per cent. of the
weight of beta-naphthol employed, a distinctly bluish red tint is obtained which is
as fast to soap as the ordinary red.
EXAMPLE.
28.5 grammes beta naphthol, 50 cubic centimetres caustic soda solution of 22° Bé.,
120 grammes Turkey-red oil of 80 per cent. or the corresponding quantity of castor
oil soap or of a gum solution and about 2.7 grammes beta naphthol sulphonate of
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Process for the Production of Red Tints by Combining on the
Fibre Para-nitraniline with Mixtures of Beta-naphthol and its
Sulphonic Acids.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of Loudon, Chartered 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 :-
Since para-nitraniline came to be employed for dyeing and printing colton goods,
O17

page_text: efforts have been made to produce tints as blue as possible besides the scarlet red
tint obtained from beta-naphthol.
The introduction of other nitro-bases, for instance ortho-nitro-para-phenetidine,
had no remarkable success.in consequence of the expense, and for other reasons.
My foreign correspondents have found that it is possible to attain the desired
end, without injury to the other colours and without much increase of cost, by
adding small quantities of the sodium salt of beta naphthol-sulphonic acid 2:7
(the F sulphonic acid of the German Patent No. 42112) to the solution of sodium
naphtholate which is employed for preparing the goods. With 5 per cent. of the
weight of beta-naphthol employed, a distinctly bluish red tint is obtained which is
as fast to soap as the ordinary red.