The Manufacture of Hydrated Carbonate of Magnesia and other Products produced therein.
Year: 1886

page_text: Date of Application, 27th Oct., 1886.
Complete Left, 26th July, 1887.
Complete Accepted, 2nd Sept., 1887.
The Manufacture of Hydrated Carbonate of Magnesia and other
Products produced therein.
We WILLIAM BRAMLEY, of 18 Clarence Street, Middlesbrough Analytical Chemist,
and WILLIAM PERCY COCHRANE of 3 Belmont Terrace Coatham, Redcar, Yorkshire,
Secretary do hereby declare the nature of our invention for THE MANUFACTURE OF
HYDRATED CARBONATE OF MAGNESIA AND OTHER PRODUCTS to be as follows:-
To a solution of an alkaline bicarbonate or alkaline sesquicarbonate or a solution of
ammonium carbonate we add magnesia, apply heat, and agitate. Hydrated Carbonate
of Magnesia is formed, or a mixture of Hydrated Carbonate of Magnesia and Hydrate
of Magnesia and the alkaline bicarbonate or sesquicarbonate is reduced to mono-
carbonate. In the case of ammonium bicarbonate or sesquicarbonate the solution
will after treatment contain Ammonium carbonate or Ammonia alone according to the
proportion of Magnesia used. In the case of Ammonium carbonate solution of
Ammonia will be formed. The operation should be performed in a closed vessel.
This will prevent loss of carbonic acid gas and ensure more rapid decomposition of
the bicarbonate, sesquicarbonate, or carbonate solution. It will also produce a hydrated
carbonate of magnesia containing a smaller admixture of hydrate of magnesia.
WILLIAM BRAMLEY.
WM. PERCY COCHRANE.

page_text: Products produced therein.
We, WILLIAM BRAMLEY of 18 Clarence street, Middlesbro' Analytical Chemist and
WILLIAM PERCY COCHRANE of Holmhurst, Park Road South, Middlesbro', Secretary,
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
To a solution of an alkaline bicarbonate or alkaline sesquicarbonate or a solution of
ammonium carbonate we add magnesia, apply heat, and agitate. Hydrated carbonate
of magnesia is formed, or a mixture of Hydrated carbonate of magnesia and Hydrate
of magnesia, and the alkaline bicarbonate or sesquicarbonate is reduced to mono-
carbonate. In the case of ammonium bicarbonate or sesquicarbonate the solution
will, after treatment, contain ammonium carbonate or ammonia alone according to
the proportion of magnesia used. In the case of ammonium carbonate solution of
ammonia will be formed.
The operation should be performed in a closed vessel. This will prevent loss of
carbonic acid gas and ensure more rapid decomposition of the bicarbonate or sesqui-
carbonate solutions.
It will also produce a Hydrated Carbonate of Magnesia containing a smaller
admixture of Hydrate of magnesia.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :
1. The manufacture of Hydrated carbonate of magnesia by treatment of alkaline
bicarbonates or sesquicarbonates with magnesia substantially as herein described.
2. The production of Carbonates of Sodium or Potassium from their bicarbonates
or sesquicarbonates by treatment with magnesia substantially as herein described.
WILLIAM BRAMLEY.
WM. P. COCHRANE.