An improved Process Ior the Production ΟΙ Carbonate ΟΙ Potassium from Chloride of Potassium or Sulphate of Potassium.
Year: 1885

page_text: An improved Process Ior the
Production ΟΙ
Carbonate
ΟΙ
Potassium from Chloride of Potassium or Sulphate of
Potassium.
I, FERDINAND BRUNJES of Leopoldshall in the Kingdom of Prussia, German
Empire Chemist, do hereby declare the nature of said invention for "AN
IMPROVED PROCESS FOR THE PRODUCTION OF CARBONATE OF POTASSIUM FROM
CHLORIDE OF POTASSIUM OR SULPHATE OF POTASSIUM to be as follows:-
This invention consists in producing carbonate of potassium from chloride of
potassium or sulphate of potassium by means of carbonate of ammonia-magnesia
and carbonic acid, the process being performed as follows:-
Carbonate of ammonia or carbonic acid and ammonia is conducted into a
solution of a suitable magnesium salt, into magnesia in suspension or carbonate of
magnesia as such or as hydrate, whereupon after some timo the double salt of
carbonate of ammonia-magnesia somewhat after the formula MgO_CO+NH¹O
CO+4 aq. containing all the magnesia in the solution, becomes eliminated. This
double salt of carbonate of ammonia-magnesia is mixed with an approximately
equivalent quantity of chloride of potassium or sulphate of potassium, an excess
of the same not being advantageous, to which so much water is added as will
dissolvo the said salts.
The compound of chloride of potassium or sulphate of potassium and carbonate
of ammonia-magnesia and water, is allowed to stand for from five to six hours
and is then treated with carbonic acid. After some time crystals of carbonate
of potassium-carbonate of magnesia are obtained somewhat after the formula
2 (MgO CO) + KO CO' HO, 2 CO2 + 8 aq. whilst sal-ammoniac or sulphate of
ammonia passes into solution with any excess of chloride of potassium or sulphate
of potassium. The double salt of carbonate of potassium-magnesia 2 (MqO CO³)+
KO CO³ HO, 2 CO³ +8 aq. is decomposed with water in the manner that car-
bonate of potassium passes into solution and carbonate of magnesia remains
behind and which is used over again in the process. Instead of the double salt of
carbonate of ammonia-magnesia the double salt of carbonate of zinc-ammonia may
Prica-fdl

page_text: be employed for the conversion of chloride of potassium or sulphate of potassium
in carrying out the before described process.
The operations, that is to say the production of carbonate of ammonia-magnesia
and the conversion of the same into carbonate of potassium-magnesia may be
combined, for example, by finally conducting carbonate of ammonia and carbonic
acid into a solution of carnallite or into a solution of potassium-magnesium
sulphate, or into magnesia in suspension or into carbonate of magnesia, as such or
in the form of hydrate, chloride of potassium being after some time added thereto,
and again carbonic acid introduced therein. In this way crystals are also obtained
which yield carbonate of potassium.

page_text: CUMI LEIE DI LUIFICATION,
An Improved Process for the Production of Carbonate of
Potassium from Chloride of Potassium or Sulphate of
Potassium.
I, FERDINAND BRUNJES of Leopoldhalle Stassfurt in the German Empire do
hereby declare the nature of said invention for "AN IMPROVED PROCESS FOR
THE PRODUCTION OF CARBONATE OF POTASSIUM FROM CHLORIDE OF POTASSIUM
OR SULPHATE OF POTASSIUM" and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement:-
This invention consists in producing carbonate of potassium from chloride of
potassium or sulphate of potassium by means of carbonate of ammonia-magnesia
and carbonic acid the process being performed as follows:-
Carbonate of ammonia or carbonic acid and ammonia is conducted into a
solution of a suitable magnesium salt, into magnesia in suspension or carbonate of
magnesia as such or as bydrate, when after some time the double salt of carbonate
of ammonia-magnesia, somewhat after the formula Mgo CO2 + NH'O CO²+4 aq.,
containing all the magnesia in the solution becomes eliminated. This double salt
of carbonate of ammonia-magnesia is mixed with an approximately equivalent
quantity of chloride of potassium or sulphate of potassium (an excess of the same
acting advantageously) to which is added as much water as will dissolve the said
salts.
This compound of chloride of potassium or sulphate of potassium and carbonate
of ammonia-magnesia and water is allowed to stand for from five to six hours and
is then treated with carbonic acid. After some time crystals of carbonate of
potassium, carbonate of magnesia are obtained somewhat after the formula 2 (Mgo
CO2)+KO CO HO, 2 CO+8 aq. whilst sal-ammoniac or sulphate of ammonia
passes into solution with any excess of chloride of potassium or sulphate of
potassium. The double salt of carbonate of potassium-magnesia 2 (Mgo CO³) +
KO CO HO, 2 CO' + 8 aq. is decomposed with water in the manner that
carbonate of potassium passes into solution and carbonate of magnesia remains
behind and which is used over again in the process. Instead of the double salt of
carbonate of ammonia-magnesia, the double salt of carbonate of zinc-ammonia
may be employed for the conversion of chloride of potassium or sulphate of
potassium in carrying out the before described process. The operations for the
production of carbonate of ammonia-magnesia and the conversion of the same
into carbonate of potassium-magnesia may be combined by, for example, finally
conducting carbonate of ammonia and carbonic acid into a solution of carnallite
or into a solution of potassium-magnesium sulphate or into magnesia in suspension
or into carbonate of magnesia, as such, or in the form of hydrate, chloride of
potassium being after some time added thereto and again carbonic acid intro-
duced therein. In this way crystals are also obtained which yield carbonate of
potassium.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what mauner the same is to be performed, declare that what
I claim is
The production of carbonate of potassium from carbonate of ammonia-magnesia
or carbonate of zinc-ammonia by decomposition with chloride of potassium or
carbonate of potassium either alone or with addition of ammonia and carbonic
acid substantially as described.