IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF COLOURING MATTERS FROM THE TETRAZO COMPOUND OF BENZIDINE DI-SULPIIONIC ACID
Year: 1884

page_text: I JOHN PETER GRIESS of Burton on Trent Chemist Do hereby declare the nature
of said Invention for "IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF
COLOURING MATTERS FROM THE TETRAZO COMPOUND OF BENZIDINE DI-SULPIIONIC
ACID" to be as follows:-
My Invention consists in the production of a new series of dyes chiefly of a
red color by combining the Tetrazo compound of Benzidine disulphonic Acid (a
compound discovered and descried by mo some years ago) with the Napthylamines
and Methyl Phenyl and Napthyl Napthylamines and the Sulpho Acids thereof.
As an example of the mode in which my Invention may be carried into practical
effect I take one molecule of the Tetrazo compound and introduce it into an
aqueous solution of two molecules of the Sodium Salt of the Sulpho Acid of
Napthylamine generally known as Napthionic Acid the mixture thus produced
(which may or may not be made slightly Alkaline by the admixture of Ammonia
therewith) is then left to stand for about six hours and afterwards evaporato it to
dryness at about 100° Centigrade-After the evaporation is finished the dye
emains Tho dye can also be separated from its very concentrated aqueous
solution by means of Common Salt.
The dyes which are produced by this Invention mostly possess the valuable
property of dyeing Cotton goods without the use of Mordants.
m. in
1001.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, W.C.,
Agent for the said John Peter Griess.

page_text: I JOHN PETER GRIESS of Burton on Trent Chemist do hereby declare the nature
of my said invention for "IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION
OF COLOURING MATTERS FROM THE TETRAZO COMPOUND OF BENZIDINE DI
SULPHONIC ACID and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:—
My Invention consists in the production of a new series of dyes chiefly of a red
colour by combining the Tetrazo compound of Benzidine Di-Sulphonic Acid (a
'compound discovered and described by me some years ago) with the Napthylamines
and methyl phenyl and Napthyl Napthylamines and the Sulpho-acids thereof.
As an example of the mode in which my Invention may be carried into practical
effect. I take one molecule of the Tetrazo compound and introduce it into an
aqueous solution of two molecules of the sodium salt of the Sulpho Acid of
Napthylamine generally known as Napthionic Acid; the mixture thus produced
-(which may or may not. be.made slightly Alkaline by the admixture of Ammonia.
therewith) is then left to stand for about six hours and afterwards evaporated. to
dryness at about One hundred degrees Centigrade. After the evaporation is
finished the dyo remains. The dye can also be separated from its very concentrated
aqueous solution by means of common salt.
The dyes which are produced by this Invention mostly possess the valuable
-property of dyeing cotton goods without the use of Mordants.
Having now particularly described and ascertained. the nature of my said
-Invention-and-in-what-manner-the-same-is-to-be-performed-I-declaro-that-what-
I claim is.
The manufacture or production of colouring matters from the Tetrazo compound