Year: 1887

page_text: Date of Application (in Foreign State), 5th I
Complete Left, 5th Nov., 1887
Complete Accepted, 6th Dec., 1887
I WILLIAM JULES SAMUEL GRAWITZ of 24 Rue d'Alsace Lorraine, Saint Maur,
(Seine) France, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the treatment of textile materials dyed with aniline
black.
Aniline black when fixed on textile fibres by dyeing presents when thoroughly
washed and dried a brownish tinge which by the action of a very hot soap bath is
changed to a bluish tinge. This soaping however, renders the fibres greasy to the
touch and imparts to them a disagreeable odour.
According to my invention I eliminate the brown tinge by the following
treatment:
For 100 kilos of cotton dyed aniline black I take of
Water
Sulphuric acid @ 65 to 66° B.
Concentrated Sulphoricinate of soda
2000 to 2500 litres
4
"
10
"
I plunge the cotton in the bath (which may be either cold or tepid) and work it
until the cotton has absorbed the fatty matter produced by the action of the sulphuric
acid upon the sulphori-cinate. This fatty matter becomes combined with the black.
The combination is rendered more stable by raising the temperature of the bath, by
subsequent rinsings in hot, boiling, or superheated water, or by steaming the cotton
while either in a moist or dry condition.
The cotton thus treated may be passed through a soap or alkaline bath as
required.
The textile materials may be treated with other bodies similar to sulphori-cinates
such for example as sulpholeates and others in conjunction with the various organic
or mineral acids, or directly by means of sulphori-cinic, sulpholeic or other similar
acids.
W. J. S. GRAWITZ.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: Process for the Treatment of Textile Materials Dyed with
Aniline Blaok.
I WILLIAM JULES SAMUEL GRAWITZ of 24 Rue d'Alsace-Lorraine, St. Maur
(Seine) France, Civil Engineer, 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:-
This invention relates to the treatment of textile materials dyed aniline black.
Aniline black when fixed on textile fibres by dyeing presents when thoroughly
washed and dried a brownish tinge which by the action of a very hot soap bath may
be changed to a bluish tinge which is very much sought after, but this soaping
renders the fibres greasy to the touch and imparts to them a disagreeable odor.
According to my invention I eliminate the brown tinge by the following i
treatment For 100 lbs. of cotton dyed aniline black, I take of
Water
-
Sulphuric acid at 65° to 66° B.
Concentrated sulphoricinate of soda
200 to 250 gallons
3.2 pints
-
8 pints
-
I immerse the cotton in the bath (which may be either cold or tepid) and handle it
therein, meanwhile gradually raising the temperature until the cotton has absorbed all
the fatty matter produced by the decomposition of the sulphoricinate by the sulphuric
acid, this fatty matter becoming combined with the aniline black. This combination
is rendered more stable by raising the temperature of the bath by subsequent rinsing
in hot boiling or superheated water, or by steaming the cotton either while moist or
after being dried.
The cotton thus treated may be passed through a soap or alkaline bath as may be
required. The textile materials may then be readily sized or dressed and are devoid
of smell.
I would have it understood that I do not limit myself to the proportions or
ingredients above mentioned, but may reserve the right to employ other organic or
mineral acids to acidify the bath and to employ other sulphoricinates such as those of
potash or ammonia or other bodies analogous thereto such for example as sulpholeates;
or to employ directly sulphoricinic, sulpholeic, or other similar acid. If sulphoricinic
acid be used, it is possible but not necessary to use sulphuric acid. This mode of
treatment is applicable to textile materials other than cotton, which are dyed aniline
black.
Aniline black dyes thus treated present a different composition and different
properties to those heretofore obtained, and they are more able to resist the action of
chlorine and constitute a new industrial product.

page_text: Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. The herein described process of treating goods which have been dyed aniline
black, which process consists essentially in causing the aniline black to combine with
a fatty matter set free in the bath by the decomposition of a fatty compound, such as
herein described, substantially as herein specified.
2. As a new industrial product, aniline black dyed goods wherein the dye has been
caused to combine with a fatty matter, substantially as and for the purpose specified.
Dated this 5th day of November 1887
W. J. S. GRAWITZ.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.