Improvements relating to the Manufacture of Colouring Matters.
Year: 1893

page_text: Date of Application, 20th Nov., 1893
Complete Specification Left, 18th July, 1891-Accepted, 25th Aug., 1894
[Communicated from abroad by K. OEHLER, of Offenbach on the Main, in the
Empire of Germany, Manufacturer.]
Improvements relating to 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:-
The intermediate compound obtained in an alkaline solution from one molecule
of a paradiamine and one molecule of ɑ ɑ amidooxynaphthaline ẞ, ẞ, disulphoacid,
which I was the first to produce yields new and valuable azo dye stuffs when
further combined with one molecule of an aromatic amine or phenole.
From the whole series of these dye stuffs, which dye cotton without mordant, I
have especially produced the following two;
The method of proceeding is as follows:
11 parts by weight of tolidine or 9,2 parts of benzidine are dissolved in 75 parts
of hydrochloric acid of 12,5% and 500 parts of water; after cooling to 0° I add
7 parts of nitrite of sodium. This solution of tetrazoditolyl-or tetrazodiphenyl-
chloride is poured at once into another solution cooled with ice to 0° of 8 parts of
caustic soda and of 18 parts of the acid potassium salt of a₁ a amidooxynaphthaline
B. B disulfoacid. After a short time a dissolution of 8 parts of 2,3 dioxy-
naphthaline and of 4 parts of caustic soda in 100 parts of water is added. The
mixture is allowed to stand for 24 hours and is then heated; the dye stuff is
precipitated by common salt, filtered off, pressed and dried.
The dye stuffs form a dark blackish brown powder with a feeble metallic lustre ;
they are soluble in water with a violet and in concentrated sulphuric acid with a
blue colour. They dye unmordanted cotton pure red-blue.
Dated this 20th day of November 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: 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, and in what manner the same is to be performed,
to be particularly described and ascertained, in and by the following statement:-
The intermediate compound obtained in an alkaline solution from one molecule of
a paradiamine and one molecule of a₁ a amidooxynaphthaline B, ẞ, disulphoacid
which I was the first to produce yields new and valuable azo dye stuffs when
further combined with one molecule of an aromatic amine or phenole.
From the whole series of these dye stuffs, which dye cotton without mordant, [
have especially produced the following two:
tolidine
azo aj o̟ amido oxynaphthaline ẞ, ß, disulphoacid
yaputoamine.
The method of proceeding is as follows:
11 parts by weight of tolidine or 9,2 parts of benzidine are dissolved in 75 parts of
hydrochloric acid of 12,5% and 500 parts of water; after cooling to,0° I add 7 parts
of nitrite of sodium. This solution of tetrazoditolyl-or tetrazodiphenylchloride is
poured at once into another solution cooled with ice to 0° of 8 parts of caustic soda
and of 18 parts of the acid potassium salt of as a amidooxynaphthaline B, B
disulfoacid. After a short time a dissolution of 8 parts of .2,3 dioxynaphthaline
and of 4 parts of caustic soda in 100 parts of water is added. The mixture is
allowed to stand for 24 hours and is then heated; the dye stuff is precipitated by
common salt, filtered off, pressed and dried.
The dye stuffs constitute a dark blackish brown powder with a feeble metallic
lustre; they are soluble in water with a violet and in concentrated sulphuric acid
with a blue colour. They dye unmordanted cotton pure red-blue.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that I am aware of the Specification
of Willcox's Patent No. 13443/90 and I make no claim to anything described
and claimed therein, but what I claim is :-
1. The method of producing red-blue disazo dye stuffs by the combination of
tetrazoditolyl-or tetrazodiphenyl with one molecule of a₁ a amidooxynaphthaline
B, B, disulphoacid in an alkaline solution and then combining the intermediate
compound thus obtained with one molecule of 2,3 dioxynaphthaline.
2. As a new article of manufacture the dye stuffs produced by the herein before
described method and having the property of being a dark blackish brown powder
with a feeble metallic lustre, soluble in water with a violet and in concentrated
sulphuric acid with a blue colour, and dyeing unmordanted cotton pure red-blue.
Dated this 18th day of July 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.