IMPROVEMENTS IN THE MANUFACTURE OF MURIATIC ACID
Year: 1873

page_text: LETTERS PATENT to John Young, of Kelly, in the County of
Renfrew, North Britain, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF MURIATIC ACID."
Sealed the 28th April 1874, and dated the 10th November 1873.
PROVISIONAL SPECIFICATION left by the said John Young at the
Office of the Commissioners of Patents, with his Petition, on the
10th November 1873.
I, JOHN YOUNG, of Kelly, in the County of Renfrew, North Britain,
do hereby declare the nature of the said Invention of "IMPROVEMENTS
IN THE MANUFACTURE OF MURIATIC ACID," to be as follows, that is to say:
-
This Invention, which relates to improvements in the manufacture of
muriatic acid, consists in obtaining the said acid from the chloride of
calcium produced in the manufacture of soda by the ammonia process.
In operating with this Invention there is mixed with the chloride of
calcium finely divided silica, such as silicious sand, and the mixture of
chloride of calcium and silica is heated to redness in a close or open
furnace or retort, a close furnace being preferred, and steam, which may

page_text: be superheated or not, is passed over or through the said mixture,
when muriatic is given off, which may be condensed in the usual
manner.
The Invention is best carried out with the silica in excess, and it is
found that one and a half parts of silicious sand to one part of dried
chloride of calcium by weight give good results.
manner.
The Invention is best carried out with the silica in excess, and it is
found that one and a half parts of silicious sand to one part of dried
chloride of calcium by weight give good results.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Young in the Great Seal Patent Office on
the 8th May 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
YOUNG, of Kelly, in the County of Renfrew, North Britain, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of November, in the year
of our Lord One thousand eight hundred and seventy-three, in the
37th year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Young, Her special license that
I, the said John Young, my executors, administrators, and assigns, or
such others as I, the said John Young, my executors, administrators,
or assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
MURIATIC ACID," upon the condition (amongst others) that I, the said
John Young, by an instrument in writing, under my hand and
seal, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.

page_text: performed, to be particularly described and ascertained in and by the
following statement, that is to say :-
My said Invention, which relates to improvements in the manufacture
of muriatic acid, consists in obtaining the said acid from chloride of
calcium produced in the manufacture of soda by the ammonia process.
In operating with this Invention the solution of chloride of calcium is
concentrated until a small portion taken out becomes partially solid or
pasty on cooling. During the evaporation a quantity of common salt
crystalizes out, which may be separated in any convenient manner.
There is mixed with the chloride of calcium finely divided silica, such
as siliceous sand, and the mixture of chloride of calcium and silica are
heated to redness in a close or open furnace or retort, a close furnace
being preferred, and steam, which may be superheated or not, is passed
over or through the said mixture, when muriatic acid is given off, which
may be condensed in the usual manner. The quantity of steam used is
regulated as stronger or weaker muriatic acid is required to be obtained.
The Invention is best carried out with the silica in excess, and it is
found that one and a half parts of siliceous sand to one part of chloride
of calcium by weight give good results.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would observe
in conclusion that what I consider to be novel and original and therefore
claim as the Invention secured to me by the herein-before in part recited
Letters Patent is, the obtainment of muriatic acid from chloride of
calcium produced in the manufacture of soda by the ammonia process
by mixing it with silica, heating it to redness, and submitting it to the
action of steam.
In witness whereof, I, the said John Young, have hereunto set my