A MANUFACture of BLUE AND VIOLET COLOURING MATTERS
Year: 1885

page_text: I, HERBERT JOHN HADDAN, of 67, Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said invention for A MANUFACture of
BLUE AND VIOLET COLOURING MATTERS, a communication to me from abroad by
the Farbenfabriken vormals Fr. Bayer & Co, a Joint Stock Company, of Elberfeld,
in the German Empire, to be as follows:-
If the product of the reaction of chlorine upon bisulphide of carbon, namely
Rathke's perchlormethyl-mercaptan, is allowed to act on tertiary aromatic amines,
in a certain manner, certain blue or violet colouring matters are produced which
seem to belong to the pararosaniline-series.
Hitherto the inventors have obtained such colouring matters by the reaction of
the perchlormethyl-mercaptan on dimethyl-aniline, methylethyl-aniline, diethyl-
aniline, diamyl-aniline, dibenzyl-aniline, methyl-benzyl-aniline, ethylbenzylaniline,
methyl-diphenilamine, dimethyl-orthotoluidine, diethyl-orthotoluidine, dimethyl and
diethyl-alpha-naphtylamine.
The method of manufacture is as follows:
For instance: 25 parts of diamethylaniline are mixed with 8 parts of calcic
carbonate, in a vessel provided with a stirrer and situated in a water bath. Then
the mixture is allowed to cool, while 11 parts of perchlormethyl-mercaptan are
slowly added to it.
The temperature is now slowly increased to 80° Centigrade and the mixture left
in this condition for about 24 hours. The product shines like copper and yields to
water a crystallizing violet colouring matter. The addition of calcic carbonato
serves to bind the hydrochloric acid produced by the reaction.
The excess of dimethyl-aniline, after an alkaline reaction has been obtained, is
driven off by means of steam, and the colouring base is converted into the sulphate,
hydrochlorate or oxalate.

page_text: The following is an example for colouring matters with mixed radicles: 50 parts
of perchlormethyl-mercaptan are added to a mixture of 67 parts of dimethyl-
aniline; 5.5 parts of methyl-diphenil-amine, and 5 parts of calcic carbonate.
The further treatment of the product is the same as described above.
COMPLETE SPECIFICATION.
A Manufacture of Blue and Violet Colouring Matters.
I, HERBERT JOHN HADDAN of 67 Strand, in the County of Middlesex, Civil -1
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad, by the "Farbenfabriken, vormals Fr. Bayer & Co," a Joint Stock
Company, of Elberfeld, in the German Empire, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
If the product of the reaction of chlorine upon disulphide of carbon, namely
Rathke's perchlormethyl-mercaptan, is allowed to act on tertiary aromatic amines,
in a certain manner, certain blue or violet colouring matters are produced which
seem to belong to the pararosaniline-series.
Hitherto the inventors have obtained such colouring matters by the reaction of 2
the perchlormethyl-mercaptan on dimethylaniline, methylethyl-aniline, diethyl-
aniline, diamyl-aniline, dibenzyl-aniline, methyl-benzyl-aniline, bethyl-benzyl-
aniline, methyl-diphenil-amine, dimethyl-orthotoluidine, diethyl-ortho-toluidine,
dimethyl and diethyl-alpha-naphtylamine..
The method of manufacture is as follows:
For instance 25 parts of dimethylaniline are mixed with 8 parts of calcic
carbonate in a vessel provided with a stirrer and situated in a water bath. Then
the mixture is allowed to cool, while 11 parts of perchlor-methylmercaptan are
slowly added to it.
2
The temperature is now slowly increased to 80° Centigrade and left in this 3
condition for about 24 hours. The product shines like copper and yields to water
a crystallising colouring matter. The addition of calcic carbonate serves to bind
the hydrochloric acid produced by the reaction.

page_text: The excess of dimethyl-aniline, after an alkaline reaction has been obtained, is
driven off by means of steam, and the colouring base is converted into the sulphate,
bydrochlorate or oxalate.
The following is an example for colouring matters, with mixed radicles.
5-6 parts of perchlormethyl-mercaptan are added to a mixture of 6-7 parts
of. dimethyl-aniline, 5.5 parts of methyl-diphenil-amine, and 5 parts of calcic
carbonate.
The further treatment of the product is the same as described above.
The proportions and temperatures vary within wide limits, according to the
quality of the materials employed and the result to be obtained.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare, that what
I claim is
1.) The new colouring matters obtained by the reaction of perchlormethyl-
mercaptan upon the tertiary aromatic amines, described above, or on molecular-
mixtures of the same.
2.) The process of producing new colouring matters by causing perchlormethyl-
mercaptan to act on tertiary aromatic amines or on molecular mixtures of the
same.