Improvement in the Production of Disazo Dye-stuffs from Gamma "Amidonaphtol" Sulpho Acid.
Year: 1893

page_text: Date of Application, 9th Mar., 1893
Complete Specification Left, 8th Dec., 1893-Accepted, 20th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvement in the Production of Disazo Dye-stuffs from Gamma
"Amidonaphtol" Sulpho Acid.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a
communication to me from abroad by Leopold Cassella & Co., of Frankfort on
Main, in the Empire of Germany, Manufacturing Chemists,) do hereby declare
the nature of this invention to be as follows :-
My correspondents have found that in the place of the paradiamines, mentioned
especially in my British Patent No. 16699, dated October 22nd 1889, p. diamido-
diphenylamine can be used. The tetrazo compound of this base combines with
two molecules gamma-amidonaphtolsulpho acid in alkaline solution forming a
blueish black dye-stuff and in acid or neutral solution a violet dye-stuff. With one
molecule gamma-amidonaphtolsulpho acid it forms intermediate bodies, which may
be combined in the known manner with amines and phenoles. The method for the
production is analogous to the one described in Specification 166999. In their
properties the dye-stuffs from tetrazodiphenylamine resemble closely the dye-stuffs
from tetrazodiphenyl; their shade is a little more blueish.
Example 1st. 30 kilos. p. diamidodiphenylaminesulphate are suspended in
400 litres water and 40 kilos. muriatic acid and diazotised at 0 deg. C. with 14 kilos.
nitrite of soda. The tetrazo compound which is of a yellow color and easily
soluble, is introduced into a solution of 60 kilos. gamma-amidonaphtolsulphonate
in 1000 litres water, kept alkaline by an excess of soda. A dark violet precipitate
separates, the color of which changes after 12 hours into a dark blue. Then it is
heated to about 80 deg. C. and the dye-stuff is precipitated with common salt. It
dyes unmordanted cotton a blueish black.
Example 2nd. The tetrazo compound from 30 kilos. diamidodiphenylaminesulphate
obtained as stated in Example 1, is introduced into a weak acid solution of 80 kilos.
gamma-amidonaphtolsulphonate, to which an excess of natrium-acetate had been
After 24 hours it is heated to 80 deg. C., then neutralised with soda and
the dye-stuff precipitated with common salt. It dyes unmordanted cotton a
added.
violet shade.
Example 3rd. The tetrazo compound of 30 kilos. diamidodiphenylamine, obtained
as stated in Example 1, is introduced into a solution, cooled with ice, of 70 kilos.
soda in 800 litres water and immediately afterwards a solution of 25 kilos. gamma-
amido-naphtolsulphonate is added. The intermediate body separates as a precipitate
of a dark color. Then a solution of 40 kilos. amidonaphtoldisulpho acid H (a₁ a
ß, B) is added. After 24 hours it is heated to 80 deg. C. and the dye-stuff
is precipitated with common salt from the blackish blue solution. It dyes
unmordanted cotton a blackish blue.
To the
Example 4th. The tetrazo compound of 30 kilos. diamidodiphenylamine obtained
as stated in Example 1, is mixed with a neutral solution of 25 kilos. a¹ a, naphtol-
sulphonate and the mixture is introduced into a solution of 70 kilos. soda.
intermediate body, which is of a red color, a solution of 30 kilos. gamma-amido-
naphtolsulphonate is added. After 24 hours it is heated and then precipitated
with common salt. The dye-stuff dyes unmordanted cotton a reddish dark blue.
In an analogous manner the mixed combinations with naphtylaminesulpho acids,
m. phenylenediamine, salicylic acid, etc., are produced.
Dand this ath 1-
Mah 1002

page_text: COMPLETE SPECIFICATION.
Improvement in the Production of Disazo Dye-stuffs from Gamma
"Amidonaphtol" Sulpho Acid.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a
communication to me from abroad by Leopold Cassella & Co., of Frankfort on
Main, in the Empire of Germany, Manufacturing Chemists,) 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 :-
My correspondents have found that in the place of the paradiamines, mentioned
especially in my British Patent No. 16699, dated October 22nd 1889, p. diamidodi-
phenylamine can be used. The tetrazo compound of this base combines with two
molecules gamma-amidonaphtolsulpho acid in alkaline solution forming a blueish
black dye-stuff and in acid or neutral solution a violet dye-stuff.
With one
molecule gamma-amidonaphtolsulpho acid it forms intermediate bodies, which may
be combined in the known manner with amines and phenoles. The method for the
production is analogous to the one described in Specification 1669989. In their
properties the dye-stuffs from tetrazodiphenylamine resemble closely the dye-stuffs
from tetrazodiphenyl; their shade is a little more blueish.
Example 1st. 30 kilos. p. diamidodiphenylaminesulphate are suspended in
400 litres water and 40 kilos. muriatic acid and diazotised at 0 deg. C. with
14 kilos. nitrite of soda. The tetrazo compound which is of a yellow color and
easily soluble, is introduced into a solution of 60 kilos. gamma-amidonaphtol-
sulphonate in 1000 litres water, kept alkaline by an excess of soda. A dark violet
precipitate separates, the color of which changes after 12 hours into a dark blue.
Then it is heated to about 80 deg. C. and the dye-stuff is precipitated with common
salt. It dyes unmordanted cotton a blueish black.
Example 2nd. The tetrazo compound from 30 kilos. diamidodiphenylamine-
sulphate obtained as stated in Example 1, is introduced into a weak acid solution of
80 kilos. gamma-amidonaphtolsulphonate, to which an excess of natrium-acetate had
been added. After 24 hours it is heated to 80 deg. C., then neutralised with soda
and the dye-stuff precipitated with common salt. It dyes unmordanted cotton a
violet shade.
Example 3rd. The tetrazo compound of 30 kilos. diamidodiphenylamine, obtained
as stated in Example 1, is introduced into a solution, cooled with ice, of 70 kilos. soda
in 800 litres water and immediately afterwards a solution of 25 kilos. gamma-amido-
naphtolsulphonate is added. The intermediate body separates as a precipitate of a
dark color. Then a solution of 40 kilos. amidonaphtoldisulpho acid H (a, a B2 B3)
is added. After 24 hours it is heated to 80 deg. C. and the dye-stuff is precipitated
with common salt from the blackish blue solution. It dyes unmordanted cotton a
blackish blue.
Example 4th. The tetrazo compound of 30 kilos. diamidodiphenylamine obtained.
as stated in Example 1, is mixed with a neutral solution of 25 kilos. a, a, naphtol-
sulphonate and the mixture is introduced into a solution of 70 kilos. soda. To the
intermediate body, which is of a red color, a solution of 30 kilos. gamma-amido-
naphtolsulphonate is added. After 24 hours it is heated and then precipitated with
common salt. The dye-stuff dyes unmordanted cotton a reddish dark blue.
analogous manner the mixed combinations with phenol, resorcine, naphtylamine-
sulpho acids, m. phenylenediamine, salicylic acid, a or oxynaphtoic acid,
m. toluylenediamine, m. amido-phenol, aniido-phenol, are produced.
In an
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1st. The production of disazo-coloring matters by combining one molecule of

page_text: tetrazodiphenylamine with two molecules of y amidonaphtolsulpho acid, or with one
molecule of this acid and one molecule of a phenol or an amine such as phenol,
naphtol-sulpho acid, resorcine, salicylic acid, oxynaphtoic-acid, m. phenylenediamine,
m. toluylenediamine, m. amidophenol, amidonaphtol, amidonaphtoldisulpho acid and
the like substantially as described.
2nd. The new coloring matters herein before described.