Manufacture of Para-oxy-para-amido-ortho-oxydiphenylamine by heating Para--para-amidodiphenmine-ortho-sulphonic acid with Caustic Alkalies.
Year: 1899

page_text: Manufacture of Para-oxy-para-amido-ortho-oxydiphenylamine by
heating Para-oxy-para-amidodiphenylamine-ortho-sulphonic acid
with Caustic Alkalies.
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 & Brüning, of Hoechst a/Main, in the Empire of Germany, Chemical
5 Manufacturers) to be as follows:-
My correspondents have found that in the cxvamido
EXAMPLE:-
Into a mixture of 10 parts by weight of caustic alkali and 4 parts by weight of
water are introduced 4 parts by weight of the above sulphonic acid and the whole
is heated for about half an hour to about 190° C. On cooling a red-brown solid
mass is obtained which is dissolved in about 100 parts by weight of water and the
solution, which when exposed to the air becomes an intense violet on its surface and
the sides of the vessel, is acidified, whereupon the dioxyamidodiphenylamine thus
obtained separates in form of its sulphate. The latter forms fine greyish white
needles easily soluble in hot water, less easily in cold water.
The new substance, when heated with sulphur and sulphides of alkali metals,
yields according to the degree of temperature applied, a blue or black dyestuff;
it is formed in the manner stated in the English Specification No. 24538 of 1898,
as intermediate product if oxyamidodiphenylaminesulphonic acid be heated with
sulphur and sulphides of alkali metals, and the dyestuffs obtained from it are
therefore identical with those obtained by the method described in the above named
Specification.
ABEL. & IMRAY,
Agents for the Applicant.

page_text: Manufacture of Para-oxy-para-amido-ortho-oxydiphenylamine by
heating Para-oxy-para-amidodiphenylamine-ortho-sulphonic acid
with Caustic Alkalies.
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 & 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 in the oxyamidodiphenylaminesulphonic
The surpH group may casi
EXAMPLE:
Into a mixture of 10 parts by weight of caustic alkali and 4 parts by
weight of water are introduced 4 parts by weight of the above sulphonic acid and the
whole is heated for about half an hour to about 190° C. On cooling a red-brown solid
mass is obtained which is dissolved in about 100 parts by weight of water and the
solution, which when exposed to the air becomes an intense violet on its surface
and the sides of the vessel, is acidified with sulphuric acid whereupon the
dioxyamidodiphenylamine thus obtained separates in form of its sulphate. The
latter forms fine greyish white needles easibly soluble in hot water, less easily in cold
water.
The new substance, when heated with sulphur and sulphides of alkali metals,
yields, according to the degree of temperature applied, a blue or black dyestuff.
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 para-oxy-para-amido-ortho-oxydiphenyl-
amine by heating with caustic alkalies para-oxy-para-amidodiphenylamine-ortho-
sulphonic acid at a temperature of 150° to 200° C.
2. The para-oxy-para-amido-ortho-oxy-diphenylamine, manufactured as above set
forth.
1000
ABEL & IMRAY,
Agents for the Applicant.