Improvements in the Manufacture of Colouring Matters.
Year: 1891

page_text: Date of Application, 25th June, 1891
Complete Specification Left, 11th Mar., 1892-Accepted, 23rd Apr., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by K. OEHLER, of Offenbach, a/m in the Grand
Duchy of Hassen, in the Empire of Germany.]
Improvements in the Manufacture of Colouring Matters.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents
45 Southampton Buildings in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
Π
:-
This invention relates to the manufacture of new azo dye stuffs from amido-oxy
naphthalindisulpho acid.
The method of producing the new azo dye stuff's consists in combining tetrazo-
diphenyl or ditolylchloride with one molecule of amido-oxy-a-naphthalindisulpho
acid and then with one molecule of one of the following bodies viz. :—
a and ẞ naphthylamme
a and ẞ naphthol
dioxynaphthaline 2, 6
metaoxy-diphenylamine
metaoxytolylphenylamine.
For example: 11 parts of tolidine or the corresponding quantity of benzidine
are dissolved in 75 parts of muriatic acid of 12, 5% and 500 parts of water.
After cooling the solution to 0 degree, 7 parts of nitrite of soda are added and the
whole is poured into a solution of 18 parts of amido-oxy a naphthalindisulpho-acid
in 700 parts of soda lye of 14%. So called intermediate compounds are thus
formed, which can be transformed into the new dye stuffs by further treating them
with a solution of 7, 5 parts of a or 3 naphthylamine in 250 parts of water and
20 parts of muriatic acid of 10%. For the combination of the intermediate com-
pounds with the other above mentioned bodies, I use alkaline solutions of
quantities corresponding to their molecular weights.
The dye stuft combinations from benzidine or tolidine with amido-oxy acid and
a or ẞ naphthylamine can also be obtained by treating the intermediate compound
derived from tetrazodiphenyl or ditolyl and a or ß naphthylamine with the amido-
naphthalindisulpho acid.
oxy a
The dye stuffs are precipitated by common salt, pressed and dried.
The soda salts of the benzidine or tolidinea zo amido-oxy a napthalindisulpho
acid-azo a napthylamine consist of a brown coloured powder soluble in water with
a red violet colour; concentrated muriatic acid added to the watery solution pro-
duces a blue violet precipitate; diluted soda lye changes the colour of the solution
into dirty violet, the dye stuffs dissolve in concentrated sulphuric acid with a blue
colour.
The soda salts of the benzidine or tolidine azo-amido-oxy a naphthalindisulpho-
acid-azonapthylamine forms a blackish brown powder with a faint metallic
lustre, they dissolve in water with a red violet colour; dilutued muriatic acid
produces a red violet precipitate; soda lye does not change the colour of the
solution; the dye stuffs dissolve in concentrated sulphuric acid with a blue colour.
The other combinations have similar properties of which I think it sufficient to
mention the colour which they dye cotton.

page_text: with a naphthylamine dye
B
"
"
dioxynaphthaline 2, 6 dye
metaoxydiphenylamine,
metaoxytolylphenylamine dye
Dated this 25th day of June 1891.
Tetrazodiphenyl or tetrazodilolylchloride
violet
red blue.
blackish blue
"
violet
"
blue
blackish blue
32
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Colouring Matters.
1, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co. Patent Agents,
45 Southampton Buildings in the County of Middlesex, 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 :-
The method of producing the azo dye stuffs as hereinafter described consists in
the combination of tetrazodiphenyl- or tetrazoditolyl-chloride with one molecule of
amido-oxy-a-naphthalindisulfoacid and then with one molecule of methoxydiphenyl-
amine or metaoxytolylphenylamine.
For example-11 parts of tolidine or a corresponding quantity of benzidine
are dissolved in 75 parts of muriatic acid of 12, 5% strength and 500 parts of
water. After cooling the solution to 0 degrees, 7 parts of nitrite of soda are
added and the whole is poured into a solution of 18 parts of amido-oxy a naphthalin-
disulfo acid in 700 parts of soda lye of 11%. So called intermediate compounds
are thus formed, which can be transformed into the new dye stuff by further
treating them with a solution of 9, 25 parts of meta oxydiphenylamine or 10 parts
of meta oxytolylphenylamine in 250 parts of water and 2 parts of caustic soda.
The dye stuffs are precipitated by common salt, pressed and dried.
The soda salts of these new dye stuffs are blackish bronze coloured powders,
soluble in water, with red to blue violet colour; concentrated muriatic acid added
to the watery solution produces blue violet precipitates, dissolving in concentrated
sulphuric acid with a blue colour.
The dye stuffs dye cotton blackish blue.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :—
First. The method of producing tetrazo dye stuffs by the combination of
tetrazodiphenyl or ditolyl with one molecule amido-oxy a naphthalindisulfoacid and
one molecule of metaoxydiphenylamine or metaoxytolylphenylamine.
Second. The dye stuffs produced by the method hereinbefore described or by
any others producing a like result.
Dated this 11th day of March 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.