IMPROVEMENTS IN THE PRODUCTION OF MAGNESIA SALTS FROM SULPHO-ACIDS
Year: 1882

page_text: LETTERS PATENT to Frank Wirth of the firm of Wirth and Company
Patent Solicitors at Frankfort on the Main in the Empire of Germany for an
Invention of IMPROVEMENTS IN THE PRODUCTION OF MAGNESIA SALTS FROM
SULPHO-ACIDS A communication from the "Farbfabrik vormals Brönner"
at Frankfort on the Main Germany
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office
of the Commissioners of Patents on the 11th December 1882.
"
FRANK WIRTH of the firm of Wirth and Company, Patent Solicitors Frankfort
IMPROVEMENTS IN THE PRODUCTION OF
on the Main, in the Empire of Germany
MAGNESIA SALTS FROM SULPHO-ACIDS [A communication from the "Farbfabrik
vormals Brönner" at Frankfort on the Main Germany]
..
This invention is based on the observation that the sulpho-acids of the aromatic
series are capable of decomposing chloride of magnesium and Sulphate of magnesia,
the magnesium salt of the particular sulpho-acid being formed under separation of
the corresponding mineral acid. One can consequently employ for the preparation
of the magnesium salts of sulpho-acids, in all cases in which it may appear
advantageous, in place of the expensive carbonate of magnesia, the much cheaper
chloride of magnesium or sulphate of magnesia The liberated mineral acid can
be separated from the magnesium salt of the sulpho-acids by filtration, heating or
other suitable means. The magnesium salts of the sulpho acids produced by this
means possess the same properties as the magnesium salts prepared by other
processes.
"As an example in which the invention is particularly advantageous I will
describe the preparation of Betanaphthalin monosulphate of magnesia :-
100 parts by weight of commercial Betanaphthalin monosulpho acid, diluted with
from one and a half to twice the weight of water, and to which a slight excess of

page_text: sulphuric acid is added, are mixed with about 325 parts of Chloride of magnesium
in solution or in solid form, at boiling heat and under stirring, and the mixture is
allowed to cool. The crystalline mass obtained consisting almost exclusively of
Betanaphthalinmonosulphate of magnesia is freed from the liberated hydrochloric
acid by filtering, pressing washing with water or a solution of Chloride of
Magnesium or by other suitable micans, and can then be further treated in the
same way as the magnesium salt of the said sulpho acid obtained in any other
manner
sulphuric acid is added, are mixed with about 325 parts of Chloride of magnesium
in solution or in solid form, at boiling heat and under stirring, and the mixture is
allowed to cool. The crystalline mass obtained consisting almost exclusively of
Betanaphthalinmonosulphate of magnesia is freed from the liberated hydrochloric
acid by filtering, pressing washing with water or a solution of Chloride of
Magnesium or by other suitable micans, and can then be further treated in the
same way as the magnesium salt of the said sulpho acid obtained in any other
manner
23 (C, H, SO, H) + Mg Cl₂ = ẞ (C₁, H, SO₂), Mg + 2 H Cl.
In a similar manner may be treated the sulpho-acids of the Naphtholes of
Anthrachinon, of Benzole, et cetra:, both with regard to chloride of magnesium and
to sulphate of magnesia.

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 1st June
1883.
FRANK WIRTH of the firm of Wirth and Company, Patent Solicitors at Frankfort
on the Main in the Empire of Germany. "IMPROVEMENTS IN THE PRODUCTION OF
MAGNESIA SALTS FROM SULPHO-ACIDS A communication from the Farbfabrik
vormals Brönner at Frankfort on the Main Germany
This invention is based on the observation that the sulpho-acids of the aromatic
series are capable of decomposing chloride of magnesium and sulphate of magnesia,
the magnesium salt of the particular sulpho-acid being formed under separation of
the corresponding mineral acid. One can consequently employ for the preparation
of the magnesium salts of sulpho-acids, in all cases in which it may appear
advantageous, in place of the expensive carbonate of magnesia, the much cheaper
chloride of magnesium or sulphate of magnesia., The liberated mineral acid can
be separated from the magnesium salt of sulpho-acids by filtration, heating or
other suitable means. The magnesium salts of the sulpho acids produced by this
means possess the same properties as the magnesium salts prepared by other
processes. As an example in which the invention is particularly advantageous I
will describe the preparation of Betanaphthalin monosulphate of magnesia:
100 parts by weight of commercial Betanaphthalin monosulpho acid, diluted with
from one and a half to twice the weight of water, and to which a slight excess of
sulphuric acid is added, are mixed with about 32.5 parts of chloride of magnesium
in solution or in solid form, at boiling heat and under stirring, and the mixture is
allowed to cool. The crystalline mass obtained consisting almost exclusively of
Betanaphthalinmonosulphate of magnesia is freed from the liberated hydrochloric
acid by filtering, pressing, washing with water or a solution of chloride of
magnesium or by other similar means, and can then be further treated in the
same way as the magnesium salt of the said sulpho-acid obtained in any other
2ẞ (C, H, SO, H) + Mg Cl₂ B (C. Hy SOs), Mg + 2 H C!.
manner.
In a similar manner may be treated the sulpho acids of the Naphtholes of
Anthrachinon of Benzole, etc, both with regard to chloride of magnesium and
sulphate of magnesia.
Having thus described the nature of this invention and in what manner the
same is to be performed as communicated to me by my correspondent, I claim:
The herein described method of producing magnesia salts from Sulpho-acids by
the action of the halogen and sulphate combinations of magnesium thereon
In Witness whereof I the said Frank Wirth have hereunto set my hand
and seal this twenty eighth day of May in the year of our Lord, one
thousand eight hundred and eighty three."
FRANK WIRTH (LS).