IMPROVEMENTS IN THE TREAT- MENT OF BRINE FOR THE PRODUCTION OF CARBONATES OF SODA AND SALT
Year: 1878

page_text: LETTERS PATENT to Ludwig Mond, of Northwich, in the County of Chester,
Manufacturing Chemist, for the Invention of "IMPROVEMENTS IN THE TREAT-
MENT OF BRINE FOR THE PRODUCTION OF CARBONATES OF SODA AND SALT."
Sealed the 18th March 1879, in pursuance of an Order of the Lord Chancellor, and
dated the 11th September 1878
PROVISIONAL SPECIFICATION left by the said Ludwig Mond at the Office
of the Commissioners of Patents on the 11th September 1878.
LUDWIG MOND, of Northwich, in the County of Chester, Manufacturing Chemist.
IMPROVEMENTS IN THE TREATMENT OF BRINE FOR THE PRODUCTION OF CAR-
BONATES OF SODA AND SALT."
"
My Invention relates to improvements upon that process for which Lettors
Patent were granted to me dated 4th December 1874, No. 4175. I now as before
purify the brine by treatment with alkalies, but before or after the addition thereof
I use an artificial temperature, by which means the purification becomes more com-
plete. The degree of temperature employed may be varied, but at present I have
found 50° cent. to answer the purpose. The brine so purified I use for the manu-
facture of carbonates of soda, as mentioned under ny former Patent aforesaid, and
also for the production of salt by the usual process.

page_text: SPECIFICATION: in pursuance of the conditions of the Letters Patent filed by
the said Ludwig Mond in the Great Seal Patent Office on the 19th March
1879.
LUDWIG MOND, of Northwich, in the County of Chester, Manufacturing Chemist.
"IMPROVEMENTS IN THE TREATMENT OF BRINE FOR THE PRODUCTION OF CARBONATES
OF SODA AND SALT."
My Invention relates to that process for which Letters Patent were granted to
me dated 4th Sept. 1874, No. 4175. I now as before, as described in the Speci-
fication of my former Patent aforesaid, purify the brine by treatment with alkalis,
but before or after the addition thereof I use an artificial temperature, by means of
which the purification becomes more complete. In practice I prefer to heat the
brine separately in suitable vessels or pipes by waste or other heat to a temperaturo
of about 50° ccn., and then add a solution of soda ash and milk of lime, as described
in my former Specification aforesaid. This having been done the combined solutions
are well mixed and allowed to settle, when a precipitate takes place, and the
required purification is effected in a more rapid and efficient manner.
The degree
of temperature although above referred to may be varied, but I have found 50° cen.
as stated to answer the purpose. The brine so purified I use for the manufacture
of carbonates of soda, as mentioned under my former Patent aforesaid, and also for
the production of salt by any of the processes now in use, by which means I obtain
a purer article than that now produced.
Having thus described and ascertained the nature of my said Invention, and the
manner in which the same is to be performed, I desire it to be understood that I
claim as secured to me under the above in part recited Letters Patent and for the
purposes above set forth, and as an improvement upon my former Patent aforesaid,
the preparatory treatment of the brine or of the brine and purifying matters com-
bined by raising it or them to an artificial temperature.
In witness whereof, I, the said Ludwig Mond, have hereunto set my hand
and seal, this Eighth day of March, in the year of our Lord One thousand
eight hundred and seventy-nine.