IMPROVEMENTS IN THE PRODUCTION OF ALKALI 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 ALKALI SALTS FROM
SULPHO-ACIDS Communicated 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 14th July 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 PRODUCTION
[Communicated from the
'Farbfabrik,
OF ALKALI SALTS FROM SULPHO ACIDS
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 sodium and sulphate of soda, the sodio
salt of the respective sulpho acid being formed under separation of the respective
mineral acid.
In all cases, therefore, where it may be found advantageous, there may be used,
in place of the expensive sodic carbonates heretofore employed for the production
of the alkali salts from sulphoacids, the much cheaper chloride of sodium or sulphate
of soda. The liberated mineral acids can be separated from the alkali salts of the .
sulphoacids by filtration, heat or any other suitable means.
The sodic salts of the sulphoacids produced in this manner possess the same
properties as the sodic salts produced by other processes.
As an example in which the invention is of particular advantage, may be
described the production of Beta Naphthalinmonosulphate of soda.
100 parts by weight of commercial Beta Naphthalinmonosulphoacid diluted
with from one and a half to twice its weight of water, and mixed with an excess
[Price 4d1

page_text: of free sulphuric acid, are combined with about 40 parts of chloride of sodium,
either in solution or in solid form, at boiling heat and under stirring, and the
mixture is allowed to cool. The crystalline paste obtained consisting almost
exclusively of Beta Naphthalinmonosulphate of soda, is separated from the liberated
hydrochloric acid, either by filtering, pressing, lixiviation with water or salt
solution, or by other suitable means and can then be manipulated in the same way
as the sodic salts of the said sulphoacids obtained by other means
of free sulphuric acid, are combined with about 40 parts of chloride of sodium,
either in solution or in solid form, at boiling heat and under stirring, and the
mixture is allowed to cool. The crystalline paste obtained consisting almost
exclusively of Beta Naphthalinmonosulphate of soda, is separated from the liberated
hydrochloric acid, either by filtering, pressing, lixiviation with water or salt
solution, or by other suitable means and can then be manipulated in the same way
as the sodic salts of the said sulphoacids obtained by other means
B C H, SO,+Na Cl=B Cho H, SO, Na+ H O1.
In the same way may be obtained for instance the sulpho acids of the Naphtholes
of Anthruchinon of Bancala Ra witham :

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 10th January
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 ALKALI 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 sodium and sulphate of soda, the
sodic salt of the respective sulpho-acid being formed under separation of the
respective mineral acid.
In all cases, therefore, where it may be found advantageous, there may be used,
in place of the expensive sodic carbonates heretofore employed for the production
of the alkali salts from sulpho acids, the much cheaper chloride of sodium or
sulphate of soda. The liberated mineral acids can be separated from the alkali
salts of the sulpho-acids by filtration, heat or any other suitable means.
The sodic salts of the sulpho-acids produced in this manner possess the same
properties as the sodic salts produced by other processes.
As an example in which the invention is of particular advantage, may be
described the production of Beta-Naphthalinmonosulphate of soda.
100 parts by weight of commercial Beta-Naphthalinmonosulphoacid diluted with
from one and a half to twice its weight of water, and mixed with an excess of free
sulphuric acid, are combined with about 40 parts of chloride of sodium, either in
solution or in solid form, at boiling heat and under stirring, and the mixture is
allowed to cool. The crystalline paste obtained, consisting almost exclusively of
Beta Naphthalinmonosulphate of soda, is separated from the liberated hydrochloric
acid, either by filtering, pressing, lixiviation with water or salt solution, or by
other suitable means, and can then be manipulated in the same way as the sodic
salts of the said sulpho-acids obtained by other means.
'
BC, H, SO, H+Na Cl=ẞ C, H, SO, Na+ H Cl.
In the same way may be obtained for instance the sulpho acids of the Naphtholes
of Anthrachinon, of Benzole &c, either with chloride of sodium or with sulphate
of soda.
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 herein described method of preparing the alkali salts from sulpho-acids by
the action thereon of the halogen and sulphate compounds of the alkalies.
In Witness whereof I the said Frank Wirth have hereunto set my hand and
seal this Sixth day of January in the year of our Lord One thousand sicht