IMPROVEMENTS IN THE MANUFACTURE OF ALKALIES AND ALKALINE SALTS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, SIDNEY GILCHRIST THOMAS, of 9 Palace Chambers, Bridge St, Westminster,
temporarily residing at Bir el Drondj El Biar Algiers Africa do hereby declare the
nature of my invention for IMPROVEMENTS IN THE MANUFACTURE OF ALKALIES
AND ALKALINE SALTS to be as follows:-
My Invention consists in Improvements in the Manufacture of Alkalies and
Alkaline (by which I mean. sodic or potassic) Salts by treating alkaline chlorides
with molten phosphoric and preferably decarburised iron in a magnesian or other
basic lined reverberatory furnace or converter in the presence of air or oxide of
iron;
the alkaline chloride being by my invention mixed with oxide of iron or
oxide of manganese or with magnesia or with magnesia and the first mentioned
oxides, and compressed by hydraulic or other pressure into bricks, slabs or balls.
In this state of mixture or compression, the salt is prevented from being too rapidly
volatilised and the reaction of the nascent phosphoric acid and silica on the salt is
facilitated.
There may also be blown in some of a similar mixture by an airblast during the
progress of the operation. A little magnesic or calcic chloride may be added to
the above mixtures to promote agglomeration and alkaline carbonates may be
substituted for chlorides, though with less economic advantage. The alkaline
slag formed is run off, lixiviated and the solution treated as described by me in a
previous specification filed the 12th day of January 1884 and numbered 1342.
Noted thin decantinth
1001

page_text: I SIDNEY GILCHRIST THOMAS of 9 Palace Chambers, Bridge Street, Westminster
temporarily residing at Bir-el Drondj El Biar Algiers Africa, do hereby declare the
nature of my Invention for IMPROVEMENTS IN THE MANUFACTURE OF ALKALIES
AND ALKALINE SALTS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention consists in Improvements in the manufacture of Alkalies and
Alkaline (by which I mean sodic or potassic) Salts by treating alkaline chlorides
with molten phosphoric, and preferably decarburised, iron, or with silicious iron, in
a magnesian or other basic or neutral lined reverberatory furnace or converter in
the presence of air or oxide of iron, the alkaline chloride being by my present
invention mixed with oxide of iron or oxide of manganese or with magnesia or
lime or with magnesia and the first mentioned oxides,, and compressed by hydraulic
or other pressure or by fusion into bricks, slabs or balls-In this state of mixture
and compression the salt is prevented from being too rapidly volatilised and the
reaction of the nascent phosphoric acid and silica on the salt is facilitated by the
presence of the more stable oxides. There may also be blown in some of a similar
mixture by an airblast during the progress of the operation. A little magnesic or
calcic chloride may be added to the above mixtures to proinote agglomeration.
This invention is also applicable when alkaline carbonates are to be transformed
into phosphates by treatment with molten phosphoric iron.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is:-
:-
In the manufacture of alkaline phosphates and silicates from alkaline chlorides
or carbonates by treatment with molten iron the improvement consisting in the
acceleration of the reaction and prevention of excessive volatilisation by mixing
the alkaline chloride or carbonate with magnesia, lime, oxide of iron or oxide of
manganese and compressing or fusing the mixture into bricks or blocks.
Dated this 28th day of November 1884.