The Manufacture and Production of New Colouring Matters.
Year: 1893

page_text: Date of Application, 27th Dec., 1893
Complete Specification Left, 25th Sept., 1894-Accepted, 27th Oct.,
1894
PROVISIONAL SPECIFICATION.
The Manufacture and Production of New Colouring Matters.
I CHARLES DREYFUS of Clayton near Manchester in the County of Lancaster
Director and General Manager of The Clayton Aniline Company Limited of
Clayton aforesaid do hereby declare the nature of this invention to be as
follows:-
This invention relates to the manufacture of new colouring matters by combining
diazo derivatives of paranitraniline, of metanitrauiline, of nitrotoluidines, or of
nitroxylidines with sulpho acids of the products obtained by acting with sulphur on
paratoluidine, metaxylidine or -cumidine riz.-Dehydrothiotoluidine, primuline
base, and the corresponding bases obtained with metaxylidine and -cumidine
(see Berlin Berichte No. XXII pages 422 and 330 aud Journal of the Chemical
Society No. CCCXVIII page 227).
As the colours obtained according to this invention from the several materials
employed are of the same or nearly of the same shade and nature, the said colours
can be made either from the pure separated bases or not as desired.
I use for the production of the colouring matters according to this invention
sulpho acid of dehydrothiotoluidine or of primuline base or sulpho acids of
metaxylidine or of -cumidine or sulpho acids of two or more of them in admixture.
I take molecular proportions of diazotised paranitraniline or of diazotised meta-
nitraniline or of diazotised nitroamines above mentioned and combine the same
with the necessary proportion of a solution of dehydrothioparatoluidine sulphonate
of sodium in an alkaline or acetic acid solution.
In case the combination be made in acid solution, after the combination is
complete the acid should be neutralised with sodium carbonate. In either case
the finished colouring matter can be boiled up and salted out in the usual way.
The colouring matters thus obtained are of fine greenish-yellow to orange shades
and will dye unmordanted cotton.
Dated this 23rd day of December 1893
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
The Manufacture and Production of New Colouring Matters.
I, CHARLES DREYFUS of Clayton near Manchester in the County of Lancaster
Director and General Manager of The Clayton Aniline Company Limited of
Clayton aforesaid do hereby declare the nature of my 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 colouring matters by combining
the diazo derivatives of para nitraniline, of meta-nitraniline, of nitro-toluidines or
of nitro-xylidines with the sulpho-acids of the products obtained by acting with
sulphur on para-toluidine, meta-xylidine or cumidine viz. dehydro-thio-.
toluidine or the primuline base, or the corresponding bases obtained with meta-
xylidine and cumidine (see Berliner Berichte No. XXII pages 422 and 330 and
the Journal of the Chemical Society No. CCCXVIII page 227).

page_text: As the colours obtained according to this invention from the several materials
employed are of similar or nearly of similar shades and nature the said colours can
be made either from the pure separated bases or not as desired.
I use for the production of the colouring matters according to this invention
sulpho-acid of debydro-thio-toluidine or of the primuline base or the sulpho acids of
meta-xylidine or of cumidine or sulpho acids of two or more of them in
admixture.
I take molecular proportions of diazotised para-nitraniline or of diazotised meta-
nitraniline or of the diazotised nitro-amines above mentioned and combine the same
with the molecular proportion of a solution of dehydro-thio-paratoluidine
sulphonate of sodium in an alkaline or acetic acid solution.
In case the combination be made in acid solution after the combination is
complete the acid should be neutralized with sodium carbonate.
In either case the finished colouring matter can be boiled up and salted out in
the usual way and the colouring matters thus obtained are of fine greenish-yellow
to orange shades and will dye cotton without a mordant.
The following is an example of a practical way of performing the invention.
13-8 lbs. of para-nitraniline are dissolved in 50 gallons of boiling water and
100 lbs. of hydrochloric acid (34 per cent.) and after cooling the whole is diazotised
which
may
be done in the usual way with 7 lbs. of nitrite of soda and the diazo
solution obtained is then run into a solution of 34 lbs. of dehydro-thio-toluidine
sulphonic acid and 80 lbs. of sodium carbonate in 100 gallons of water and after
standing 24 hours the whole is boiled up and the colouring matter can be separated
by means of salt in the usual way.
Similarly the other materials named can be used in place of para-nitraniline and
dehydro-thio-toluidine sulphonic acid respectively.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.-
1. The manufacture of colouring matters by combining diazo derivatives of
para-nitraniline of meta-nitraniline, of nitro-toluidines, or of nitro-xylidines with
the sulphonic acids of products obtained by the action of sulphur on para-toluidine,
or meta-xylidine or cumidine or two or more of them substantially as hereinbefore
described.
2. As new articles of manufacture colouring matters such as can be produced in
the manner hereinbefore described and claimed.
Dated this 25th day of September 1894.
JOHNSONS & WILLCOX,
Agents.