IMPROVEMENT IN THE MANUFACTURE OF COLOURING MATTERS
Year: 1881

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company,
#1
Patent Solicitors, at Frankfort-on-the-Main, in the Empire of Germany, for
an Invention of IMPROVEMENT IN THE MANUFACTURE OF COLOURING
MATTERS." A communication from Eduard Oehler, trading under the Firm
of K. Oebler, of Offenbach-on-the-Main, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office
of the Commissioners of Patents on the 21st December 1881.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort on the Main, in the Empire of Germany. "IMPROVEMENT IN THE
MANUFACTURE OF COLOURING MATTERS." [A communication from Eduard Oeliler,
trading under the Firm of K. Oehler, of Offenbach-on-the-Main, in the Empire of
Germany.]
This Invention consists in the treatment of certain substances to be converted
into their sulpho acids by means of anhydrous ethionic acid or its chlorhydrine.
To these substances, which are to be converted into their sulpho acids, belong in the
first place rosaniline and the secondary products accompanying it during the
manufacture and all its derivatives; but this treatment also with other bases may
be employed. By the term anhydrous ethionic acid (sulphate of carbyle) I
designate the body obtained through direct combination of ethylene and anhydrous
sulphuric acid.
Chlorhydrine of ethionic acid is a new not yet described body, which I produce
by the treatment in higher temperatures of anhydrous sulphuric acid with ethyl
chloride. This body crystallizes in fine white needles, and shows itself as well
in its composition as in its properties to be the chlorhydrine of ethionic acid
SO, Cl
or as anhydrous ethionic acid, plus ono molecule of muriatic
C, H
acid.
SO, H'
The sulpho acids are produced as follows:-One part of the above named bases
or an equivalent quantity of their salts is brought together in a suitable manner
with from 3 to 4 parts of anhydrous ethionic acid or chlorhydrine of ethionic acid;
the mixture is then heated up to 100° cent. during some time, until a sample
dissolves entirely in an aqueous alkaline solution; I then transform the obtained
sulpho acids into salts in the well known manner.
The product obtained by Th. von Purgold, as described in the "Berichte der
Deutschen Chemischen Gesellschaft, Berlin," 1873, page 502, consisting in great part
of the chlorhydrine of ethionic acid, may also be employed for the purposes of this
Invention.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frank Wirth in the Great Seal Patent Office on the 23rd May
1882.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort on the Main, in the Empire of Germany. "IMPROVEMENTS IN THE
MANUFACTURE OF COLOURING MATTERS." A communication from Eduard Oehler,
trading under the Firm of K. Oehler, of Offenbach on the Main, in the Empire of
Germany.
This Invention consists in the treatment of certain substances to be converted
into their sulpho acids by means of anhydrous ethionic acid or its chlorhydrine.
To these substances, which are to be converted into their sulpho acids, belong in
the first place rosaniline and the secondary products accompanying it during the
manufacture and all its derivatives; but this treatment may also be employed with
other similar bases. By the term anhydrous ethionic acid (sulphate of carbyle) I
designate the body, obtained through the direct combination of ethyleno aud
anhydrous sulphuric acid.
Chlorhydrine of ethionic acid is.a-new-not-yot described-body, which-I-produce
by the treatment in higher temperatures of anhydrous sulphuric acid with ethyl
chloride. This body crystallizes in fine white needles, and shews itself as well
in its composition as in its properties to be the chlorhydrine of ethionic acid
SO, CI
C.H
or as anhydrous ethionic acid, plus one molecule of muriatic
SO, H
acid.
The sulpho acids are produced as follows:-One part of the above named bases
or an equivalent quantity of their salts, is brought together in a suitable manner
with from 3 to 4 parts of anhydrous ethionic acid or chlorhydrine of ethionic acid;
the mixture is then heated up to 100° cent. during some time, until a sample dissolves
in an aqueous alkaline solution; I then transform the obtained sulpho acids into
salts in the well known manner.
The product obtained by Th. von Purgold, as described in the "Berichte der
Deutschen Chemischen Gesellschaft, Berlin," 1873, page 502, consisting in great part
of the chlorhydrine of ethionic acid, may also be employed for the purposes of this
Invention.
Having thus described the nature of the said Invention, and in what manner
the same is to be performed, as communicated to me by my correspondent, I
claim,―
The production of sulpho acids by the treatment of rosaniline or its derivatives
or other similar bases with the anhydride or chlorhydrine of ethionic acid.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand
and seal, this Twentieth day of May, in the year of our Lord One thousand
eight hundred and eighty two.