IMPROVEMENTS IN THE MANUFACTURE OF CHLORATE OF SODA " SPECIFIC
Year: 1883

page_text: LETTERS PATENT to Edmund Knowles Muspratt of Seaforth Hall near
Liverpool in the County of Lancaster, and George Eschellmann Ph: D, of
Widnes also in the County of Lancaster-for an Invention of " IMPROVEMENTS
IN THE MANUFACTURE OF CHLORATE OF SODA "
PROVISIONAL SPECIFICATION left by the said Edmund Knowles Muspratt
and George Eschellmann at the Office of the Commissioners of Patents on
the 31st October 1883.
EDMUND KNOWLES MUSPRATT of Seaforth Hall near Liverpool in the County
of Lancaster and GEORGE ESCHELLMANN Ph D. of Widnes also in the County of
Lancaster. "IMPROVEMENTS IN THE MANUFACTURE OF CHLORATE OF Soda"
Chlorate of Soda is at present manufactured from Chlorate of Potash or by the
methods described in the Specifications of the Patents granted to Walter Weldon
dated 1st February 1881 and Numbered 424 and 425.
Our Invention consists in the substitution of Magnesia for the lime used in the
said method for the absorption of Chlorine Gas and the subsequent treatment of
the resulting liquor as hereinafter described The Magnesia is mixed with water
and kept in suspension therein by agitation and treated with Chlorine Gas as in
the case of Milk of Lime. The produce is liquor containing Magnesium Chlorate
and Magnesium Chloride in the proportion of from about 5 to 5 equivalents of
the latter to one of the former. The Magnesian liquor may be at once subjected
to the treatment hereinafter described or the said Magnesian Liquor may be
boiled down to about 75° to 80° Twaddell and Magnesium Chloride crystallized out
by cooling leaving behind a Liquor containing one equivalent of Magnesium
Chlorate to four equivalents of Magnesium Chloride.
The original or the improved Magnesian liquor is treated with either Caustic
Soda or Carbonate of Soda or with mixtures of the same so as to decompose the
Salts of Magnesia either into magnesia or Carbonate of Magnesia or mixtures of

page_text: the same and so as to yield a solution of Chlorate of Soda and of Chloride of
Sodium The Magnesia or Magnesium Carbonate or into mixtures of the same is
or are allowed to settle and the clear liquor is decanted off for further treatment-
The magnesia thus obtained after having been washed may be again employed for
the absorption of Chlorine and the Magnesium Carbonate or the mixtures of
Magnesia and of Carbonate of Magnesia after having been washed and Calcined
may be again employed for the absorption of Chlorine
The decanted sodium liquor is boiled down to about from 95° to 100° Twaddell by
which treatment the Sodium Chloride falls out as Crystals which may be separated
from the liquor in any known way.
The remaining liquor is then allowed to cool and Sodium Chlorate is crystallized
therefrom.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edmund Knowles Muspratt and George Eschellinann in the Patent
Office on the 28th March 1884.
EDMUND KNOWLES MUSPRATT of Seaforth Hall near Liverpool in the County.
of Lancaster and GEORGE ESCHELLMANN Ph: D. of Widnes also in the County of
Lancaster. "IMPROVEMENTS IN THE MANUFACTURE OF CHLORATE OF SODA"
Chlorate of Soda is at present manufactured from Chlorate of Potash or by the
methods described in the Specifications of the Patents granted to Mr Walter
Weldon dated first February One thousand eight hundred and eighty one and
Numbered 424 and 425.
Our Invention relates to the production of Chlorate of Soda and consists in the
employment of Magnesia in conjunction with Chlorine (in a manner similar to
that now adopted in the production of Chlorate of Lime) so as to obtain Chlorate
of Magnesia and Chloride of Magnesium.
The products thus resulting are then treated with either Caustic Soda or with
Carbonate of Soda or with mixtures of the same so as to produce corresponding
Compounds of Soda via Chlorate of Soda and Chloride of Sodium and also either
Magnesia or Carbonate of Magnesia or mixtures of the same.
In carrying our Invention into effect the Magnesia is mixed with water and is
kept in suspension therein by agitation and treated with Chlorine Gas after the
manner practised when Milk of Lime is employed for the production of Chlorate
of Lime. The product of this treatment of Magnesia with Chlorine is a liquor
containing Magnesium Chlorate and Magnesium Chloride in the proportion of
from about five to five and a half equivalents of the latter to one of the former.
This Magnesian liquor may be at once subjected to the treatment hereinafter
described or the said Magnesian liquor may be boiled down to about from 75°
to 80° Twaddell and Magnesium Chloride crystallized out by cooling leaving
behind a liquor containing one equivalent of Magnesium Chlorate to about four
equivalents of Magnesium Chloride.
The original or the improvel Magnesian liquor is then treated with either
Caustic Soda or with Carbonate of Soda or with a mixture of the same so as to
decompose the Salts of Magnesia and of Magnesium either into Magnesia or
Carbonate of Maguesia or mixtures of the same and so as to yield a solution of
Chlorate of Soda and of Chloride of Sodium.
The Magnesia or Magnesium Carbonate or mixtures of the same is or are allowed
to settle and the clear liquor is decanted off for further treatment-The Magnesia
thus obtained after having been washed may be again employed for the absorption
of Chlorine, and the Carbonate of Magnesia or mixtures of Magnesia and Carbonate
of Magnesia after having been washed and calcined, may be again employed for
the absorption of Chlorine.
The decanted Sodium liquor is then to be boiled down to about from 95° to
100° Twaddell by which treatment the Sodium Chloride falls out as Crystals
which may be separated from the liquor in any known way.
The remaining Liquor is then allowed to cool and Sodium Chlorate is Crystallized
therefrom.
Having now described and particularly ascertained the nature of our said
Invention and the manner in which the same is or may be used.or carried into
effect we would observe in conclusion that we do not confine ourselves to the
exact proportions and densities above set forth as they may be varied according
to circumstances and conditions but what we consider to be novel and original and

page_text: therefore claim as the Invention secured to us by the herein before in part recited
Letters Patent is :-
First, The manufacture of Chlorate of Soda by the employment of Magnesia
'mixed with water in conjunction with Chlorine and Subsequently effecting the
decomposition of the resulting Magnesian Liquor by means of Caustic Soda or
Carbonate of Soda or mixtures of the same substantially as hereinbefore described
Second. The manufacture of Chlorate of Soda by the employment of Magnesia
mixed with water in conjunction with Chlorine, then boiling down the resulting
Magnesian liquor to crystallize out Magnesium Chloride and then decomposing the
liquor by means of Caustic Soda or Carbonate of Soda or mixtures of the same
substantially as herein before described.
In witness whereof, I the said Edmund Knowles Muspratt on behalf of myself
and the said George Eschellmann have to this our Specification set my hand and.
seal this seventh day of March One thousand eight hundred and eighty four.