Improvements in the Manufacture of Colouring Matters.
Year: 1891

page_text: Date of Application, 30th Jan., 1891
Complete Specification Left, 5th Oct., 1891-Accepted, 7th Nov., 1891
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE ACTIEN GESELLSCHAFT FÜR ANILIN
FABRIKATION, of Berlin, in the Empire of Germany, Chemical Manufacturers.]
Improvements in the Manufacture of Colouring Matters.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, do hereby declare the
nature of this invention to be as follows
This invention relates to the production of new red substantive colours, which
are obtained by reacting with the intermediate product, formed as described in the
Specification of Martius' Patent No. 2213 of 1886, by the combination of one
molecule of tetrazodiphenyl salt and one molecule of ẞ naphtholdisulpho acid G,
with the ethers of phenol carbon acids, such as methyl, ethyl or phenyl ethers. of
salicylic acid, ortho- and meta-cresol carbon acid and the like.
The colouring matters formed in this way can afterwards be alkylised in the well
known manner.
EXAMPLE.
A salt of tetrazodiphenyl is combined in equal molecular proportions with an
alkali salt of ẞ naphtholdisulpho acid G in alkaline solution; to the intermediate
product thus obtained, an alkaline solution of methylether of salicylic acid is
added.
The reaction takes place according to the equation:
the new colouring matter.
The new product dyes wool and cotton in an acid bath a bright red.
The alkylation is performed by the treatment with halogen alkyl in an alcoholic
solution to which an alkali is added. Good results are obtained if 1 molecule of
the aforesaid colouring matter, 14 molecule of ethyl bromide and a sufficient
quantity of alkali are heated for 12 hours to 60-70° C. The ethylated colouring
matter may be separated by crystallisation from the unaffected product, the latter
being more readily soluble in water.
The ethylated colour dyes wool and cotton a red tint similar to that produced by
the unethylated product, but it resists the action of alkalies and can consequently
also dye in an alkaline or soap bath.
Instead of ethyl bromide, other halogen alkyls and alkyl sulphates or benzyl

page_text: chloride may be used; moreover the colouring matter can be made fast against
alkalies by the action of ethylene bromide.
For the methyl ether of the salicylic acid may be substituted, with a similar
result, the other above mentioned ethers of the phenol carbon acids, the process
remaining the same as described.
Dot
T
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Colouring Matters.
I, OLIVER IMRAY, of No. 28, Sonthampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, 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 production of new red substantive colours which
are obtained by reacting with the intermediate product formed as described in the
Specification of Martius Patent No. 2213 of 1886 by the combination of one
molecule of tetrazo diphenyl salt and one molecule of ẞ naphthol disulpho acid G.
upon the ethers of phenol carbon acids such as methyl, ethyl or phenyl ethers of
salicylic acid, or ortho- and meta-cresol carbon acid.
The colouring matters formed in this way can afterwards be alkylised in the well
known manner.
EXAMPLE.
A salt of tetrazo diphenyl is combined in equal molecular proportions with an
alkali salt of naphthol-disulpho acid G. in alkaline solution; to the intermediate
product thus obtained an alkaline solution of methyl-ether salicylic acid is added.
The reaction takes place according to the equation:
the new colouring matter.
The new product dyes wool and cotton in an acid bath a bright red.
The alkylation is performed by the treatment with halogen alkyl in an alcoholic
solution to which an alkali is added. Good results are obtained if one molecule of
the aforesaid colouring matter 1 molecule of ethyl-bromide and a sufficient
quantity of alkali are heated for 12 hours to 60-70° C.
The ethylated colouring matter may be separated by crystallisation from the
unaffected product, the latter being more readily. soluble in water.
The ethylated colour dyes wool and cotton a red tint similar to that produced by
the unethylated product, but it resists the action of alkalies and can consequently
also dye in an alkaline or soap bath.

page_text: Instead of ethylbromide, other halogen alkyls and alkyl-sulphates or benzyl
chloride may be used with a similar result.
For the methyl ether of the salicylic acid may be substituted the other ethers of
salicylic acid above mentioned, the process remaining the same as described.
Among the colouring matters thus produced those obtained from the phenyl ether
of salicylic acid are distinguished by their bright tint and tendency to crystallisc.
Moreover, for the ethers of the salicylic acid may be substituted those of the
ortho- or meta-cresol-carbon acid; the colouring matters obtained from these are
slightly more blueish-red.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
:-
1. The process for the production of colouring matters by the reaction of the
intermediate product, obtained from the combination of one molecule of tetrazo-
diphenyl-salt and one molecule of ẞ-naphthol disulpho acid G. upon the eythl
methyl or phenyl-ethers of salicylic acid, or upon ortho- or meta-cresol-carbonic
acid.
2. Alkylising the products formed according to the above claim, by means of
halogen-alkyls, alkyl-sulphates or benzyl chloride.
3. The colouring matters produced as above described.
Dated thin 5th da
1001
ABEL & IMRAY,
Agents for the Applicant.