A New Colouring Matter for Dyeing and Printing Purposes and its Method of Manufacture.
Year: 1889

page_text: Date of Application, 14th Feb., 1889
Complete Specification Left, 8th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
A New Colouring Matter for Dyeing and Printing Purposes and its
Method of Manufacture.
I ROBERT GNEHM Director of the Society of Chemical Industry in Basle, in the
Republic of Switzerland do hereby declare the nature of the said invention for
"A NEW COLOURING MATTER FOR DYEING AND PRINTING PURPOSES, AND ITS METHOD.
OF MANUFACTURE," to be as follows:-
This invention relates to the production of a colouring matter suitable for dyeing:
and printing, by the action of succinic acid upon Diethylmetamidophenol.
In carrying out my invention I proceed as follows.
30 grammes of Diethylmetamidophenol.
50
20
دو
"
Succinic acid and
Chloride of zinc, are heated together for a quarter of an hour at.
205° centigrade, or for 1 to 2 hours at 195° centigrade, it is then allowed to cool, and
the liquefied mass is again heated with one litre of water in the bain-marie (or water
bath) until it is completely dissolved, it is then precipitated with 150 grammes of
kitchen salt and when cold the mother lye is decanted.
It is again heated with one litre of water and 20 grammes of sal ammoniac the
colouring matter is then precipitated with 150 grammes of cominon salt.
3
It is again decanted and the semifluid residue dissolved in 10 m³ of muriatic acid, and.
one litre of water, and the filtered solution is evaporated to dryness.
When pulverized the colouring matter presents a brownish red, and very hygro-
spopic powder, which is soluble in water and spirit.
The alcoholic solution as well as dyed silk show a decidedly yellow fluorescence..
The product obtained in the manner above described dyes wool, silk, and mordanted
cotton a brilliant red with yellow fluorescence.
Dated this Lith day of February 1889
A. C. HENDERSON & Co.,
Patent Agents,
46, Southampton Buildings, Agents for the Applicant.
COMPLETE SPECIFICATION.
A New Colouring Matter for Dyeing and Printing Purposes and its
Method of Manufacture.
I ROBERT GNEHм, Director of the Society of Chemical Industry in Basle, in the
Republic of Switzerland do hereby declare the nature of the said invention for
"A NEW COLOURING MATTER FOR DYEING AND PRINTING PURPOSES AND ITS METHOD.
OF MANUFACTURE, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement, that is to say :-
This invention relates to the production of a colouring matter suitable for dyeing:
and printing, by the action of succinic acid either upon Diethylmetamidophenol, or
upon Dimethylmetamidophenol.
11
COMPLETE SPECIFICATION.
A New Colouring Matter for Dyeing and Printing Purposes and its
Method of Manufacture.
I ROBERT GNEHM, Director of the Society of Chemical Industry in Basle, in the
Republic of Switzerland do hereby declare the nature of the said invention for
"A NEW COLOURING MATTER FOR DYEING AND PRINTING PURPOSES AND ITS METHOD.
OF MANUFACTURE, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement, that is to say :-
This invention relates to the production of a colouring matter suitable for dyeing:
and printing, by the action of succinic acid either upon Diethylmetamidophenol, or
upon Dimethylmetamidophenol.
In carrying out my invention in operating with Diethy Imetamidophone! I pressed.
as follows:-
30 grammes of Diethylmetamidophenol.
50
"
22
20
"2
"
Succinic acid, and
Chloride of zinc are heated together for a quarter of an hour
at 205° centigrade, or for 1 to 2 hours at 195° centigrade; it is then allowed to cool,
and the liquefied mass, is again heated with 1 litre of water in the bain-marie (or

page_text: water bath) until it is completely dissolved, it is then precipitated with 150 grammes
of kitchen salt, and when cold the mother lye is decanted.
It is again heated with one litre of water and 20 grammes of sal ammoniac, the
colouring matter is then precipitated with 150 grammes of common salt.
3
It is again decanted and the semi-fluid residue dissolved in 10 %³ of muriatic
acid, and one litre of water, and the filtered solution is evaporated to dryness.
When pulverized the colouring matter presents a brownish red, and very hygro-
scopic powder, which is soluble in water and spirit.
The alcoholic solution as well as dyed silk show a decidedly yellow fluorescence.
The product obtained in the manner above described dyes wool, silk, and mordanted
cotton a brilliant red with yellow fluorescence.
In operating with Dimethylmetamidophenol the following is the mode of
procedure:-
A mixture of 15 Kilogrammes of succinic acid anhydride, and of 10 Kilogrammes of
Chloride of zinc is heated to 190° centigrade, to which is then added 10 Kilogrammnes
of Dimethylmetamidophenol. The temperature should in no case exceed 210° centigrade.
After a lapse of 15 minutes the mass begins to thicken, and the reaction is com-
pleted. The molten mass is first pulverized and then dissolved by heating it in
200 litres of water and 20 litres of muriatic acid.
When cooled down the colouring matter separates out, into crystalline needles of a
darkish green colour. The crystals are filtered out, and to thoroughly purify them,
they are dissolved in 300 litres of hot water, and 5 litres of concentrated muriatic
acid. This solution is again filtered 5 litres of muriatic acid being added, and then
the whole is left for crystallization.
The hydrochloride of the colouring matter separates out into crystalline needles of
about.1 centimetre in length, and of a glistening green colour. It is soluble in water
and in alcohol.
The alcoholic solution as well as the dyed silk show a decidedly yellow fluorescence.
The product obtained in the manner before described dyes a brilliant red, with yellow,
fluorescence on wool, silk, and mordanted cotton.
By the substitution of Diethylmetamidophenol for the Dimethylmetamidophenol
and proceeding in precisely the same manner a colouring matter of similar qualities
.but of a somewhat more violet shade is obtained.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I claim
1st. The red colouring matters hereinbefore described and having the characteristics
above set forth.
2nd. The method of producing colouring matters by the action of succinic acid on
Diethylmetamidophenol. and also upon Dimethylmetamidophenol substantially as
.described.
Dated this 7th day of November 1880.
A. C. HENDERSON & Co.;;
46, Southampton Buildings; Holborn, Agents for the Applicant.