Manufacture of Pyridine Colouring Matters.
Year: 1898

page_text: Date of Application, 23rd Feb., 1898
Complete Specification Left. 11th Nov., 1898-Accepted. 7th Jan.. 1899
Date of Application, 2014 10., 1000
Complete Specification Left. 11th Nov., 1898-Accepted. 7th Jan.. 1899
PROVISIONAL SPECIFICATION.
Manufacture of Pyridine Colouring Matters.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by The Farbwerke, vormals
Meister Lucius and Brüning, of Hoechst a/Main, in the Empire of Germany,
Chemical Manufacturers) to be as follows:-
My foreign correspondents have found that pyridine bases can be employed for
the manufacture of valuable basic azo colouring matters by introducing the
pyridine bases in the form of diazotised amido-benzylpyridine or homologous com-
pounds into azo colouring matters.
The new dyestuffs are produced by diazotising amidobenzylpyridines, obtained
as chlorides by the addition of nitrobenzylchloride to the pyridine bases and sub-
sequent reduction, and allowing them 1.) to act upon the amines, phenols, their
derivatives and mono-azo-colouring matters capable of being combined, 2.) by
further diazotising the p-amidoazo-colouring matters obtained from primary
amines with the diazotised amidobenzlypyridine and combining them with azo-
components.
The following examples illustrate the process: —
1.) 1 kilo. of p-amidobenzylpyridine chloride as double salt of chloride of zinc
is dissolved in 20 litres of water and diazotised by the addition of 1 kilo. of
hydrochloric acid and 0.32 kilo. of nitrite; 0.55 kilo of p-xylidine in a
hydrochloric acid solution is added to this diazo-solution and the dyestuff is separated
by the addition of sodium acetate.
It is, when dry, a reddish-brown powder.
2.) 1 kilo. of the dyestuff obtained from amido-benzylpyridine and p-xylidine as
described in example 1) is diazotised with the corresponding quantity of nitrite
and hydrochloric acid, to which is then added a quantity corresponding to 1 mole-
cule of aceto-acet-anilide dissolved in caustic soda lye.
On addition of sodium acetate the dyestuff separates out in form of orange
yellow powder.
The colouring matters obtained as hereinbefore described from amidobenzyl-
pyridine dye tannin mordanted cotton or wool and cotton in an acid bath.
Dated this 23rd day of February 1898
ABEL & IMRAY,
Agents for the Applicant.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of Pyridine Colouring Matters.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
Price 8d.]

page_text: invention (as communicated to me from abroad by The Farbwerke, vormals
Meister Lucius and Brüning, of Hoechst a/Main, in the Empire of Germany,
Chemical Manufacturers) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:
-
My foreign correspondents have found that pyridine bases can be employed for
the manufacture of valuable basic azo-colouring matters by introducing the
pyridine bases in the form of diazotised amidobenzylpyridine or homologous com-
pounds into azo-colouring matters.
The new dyestuffs are produced by diazotising amidobenzylpyridines, obtained
as chlorides by the addition of nitrobenzylchloride to the pyridine bases and sub-
sequent reduction, and allowing them 1.) to act upon the amines, phenols, their
derivatives and mono-azo-colouring matters capable of being combined, 2.) by
further diazotising the p-amido-azo-colouring matters obtained from primary
amines with the diazotised amidobenzylpyridine and combining them with azo-
components.
The following examples illustrate the process:-
1.) 1 kilo. of p-amidobenzylpyridine chloride as double salt of chloride of zinc
is dissolved in 20 litres of water and diazotised by the addition of 1 kilo. of
hydrochloric acid and 0.32 kilo. of sodium nitrite; 0.55 kilo. of p-xylidine in a
hydrochloric acid solution is added to this diazo-solution and the dyestuff is separated
by the addition of sodium acetate.
It is, when dry, a reddish-brown powder.
2.) 1 kilo. of the dyestuff obtained from amido-benzylpyridine and p-xylidine as
described in Example 1) is diazotised with the corresponding quantity of nitrite
and hydrochloric acid, to which is then added a quantity corresponding to 1 mole-
cule of aceto-acet-anilide dissolved in caustic soda lye.
On addition of sodium acetate the dyestuff is separated in form of an orange
yellow powder.
The colouring matters obtained as hereinbefore described from amidobenzyl-
pyridine dye tannin mordanted cotton or wool and cotton in an acid bath.
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 I
claim is:
1. The herein described manufacture of basic colouring matters by diazotising
the amido-compounds obtained by reducing the products resulting from addition
of pyridine to nitrobenzyl chloride or the homologues of such products and combin-
ing them with amines, phenols, their derivatives and monoazodyestuffs capable of
being combined.
2. The herein described manufacture of basic colouring matters by diazotising
the amido-compounds obtained from primary amines in the manner referred to in
Claim 1 and combining the diazo-compounds thus produced with azo-components.
3. The colouring matters obtained as above set forth.
Dated this 11th day of November 1898
ABEL & IMRAY,
Agents for the Applicant.