PL14935B3 - Method of processing potassium salts. - Google Patents

Method of processing potassium salts. Download PDF

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Publication number
PL14935B3
PL14935B3 PL14935A PL1493529A PL14935B3 PL 14935 B3 PL14935 B3 PL 14935B3 PL 14935 A PL14935 A PL 14935A PL 1493529 A PL1493529 A PL 1493529A PL 14935 B3 PL14935 B3 PL 14935B3
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PL
Poland
Prior art keywords
magnesium
potassium salts
ammonium
ammonium phosphate
potassium
Prior art date
Application number
PL14935A
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Polish (pl)
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Application filed filed Critical
Publication of PL14935B3 publication Critical patent/PL14935B3/en

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Najdluzszy czas trwania patentu do 16 wrzesnia 1946 r.W patencie Nr 14537 opisany jest spo¬ sób przerobu .soli potasowych, w którym u- zywa sie amon jak, jako posrednik reakcji, w celu rozlozenia soli potasowych na czesci skladowe. Zdolano stwierdzic, ze magnez mozna korzystnie oddzielic od innych cze¬ sci skladowych pod postacia fosforanu ma- gnezowo-amonowego. W ten sposób nietylko zyskuje sie nowy cenny nawóz, lecz rów¬ niez ma sie te korzysc, ze mozna lugi tak dalece uwolnic od zwiazków magnezowych, ze te nie przeszkadzaja przy wytracaniu dwuweglanu sodowego zapomoea amonja- ku i kwasu weglowego. Okazalo sie miano¬ wicie, ze w przypadku, gdy naweglany lug zawiera jeszcze znaczniejsze ilosci soli ma- gneizowych, wówczas dwuweglan sodowy wypada w postaci mazistej, trudnej do sa¬ czenia. Jezeli natomiast magnez zostaje wy dzielony, jako fosforan magnezowo- a- monowy, wówczas otrzymuje sie lugi, na¬ dajace sie doskonale do wytracenia dwu¬ weglanu.Sposób przeprowadza sie, jak podano ponizej. Lugi pozostale po wytraceniu siar¬ czanu potasu i zawierajace duze ilosci a- moinjaiku zadaje sie fosforanami potasow- cowemi np. fosforanem amonowym lub tez^jkwasem fosforowymi. Pmzytem magnez ^•Wypada praktycznie calkowicie jako fosfo¬ ran maj^nizzo^-aiiionowy, który znanym sposobem latwo oddziela sie od lugów ma- cierzysitych.Mozna jednak równiez postepowac w ten sposób, ze czesc magnezu, jak to opisa¬ no w patencie Nr 14537, oddziela sie w po¬ stapi trójwodneigo weglanu magnezu lub weglanu magnezowo-amonowego, a reszte straca jako fosforan magnezowo-amonowy.Ostatecznie mozna wogóle zrezygnowac z wytracenia siarczanu potasu, co stanowi¬ lo pierwsze stad jurni sposobu wedlug paten¬ tu Nr 14537, i roztwór surowej soli pota¬ sowej wytracac bezposrednio zapoimoca fo¬ sforanu potasowcowego lub kwasu fosforo¬ wego, zapewniwszy uprzednio obecnosc do- statecznych Hosci amoniaku i chlorku amo¬ nu. Do wytracenia fosforanu magnezowo- amonowego najlepie j uzywac iosforon amo¬ nowy lub tez kwas fosforowy, jaki powsta¬ je pmzy syntetycznym sposobie otrzymywa¬ nia kwasu fosforowego lub jaki sie otrzy¬ muje przy rozkladzie fosforanów wapnia kwlasetm siarkowym. PL PLThe longest patent period lasted until September 16, 1946. Patent No. 14,537 describes a method for processing potassium salts in which ammonium is used as a reaction intermediate to decompose the potassium salts into their constituent components. It was found that magnesium can be advantageously separated from the other constituents in the form of magnesium ammonium phosphate. This not only provides a valuable new fertilizer, but also has the advantage of freeing the lyes to such an extent that they do not interfere with the precipitation of sodium bicarbonate by ammonia and carbonic acid. It turned out that when the carbonized lye contains even larger amounts of magnesium salts, the sodium bicarbonate precipitates in a sticky form that is difficult to filter. However, if the magnesium is separated as magnesium ammonium phosphate, the resulting lyes are perfectly suited for precipitating the bicarbonate. The method is carried out as follows. The lyes remaining after the potassium sulfate precipitation and containing large amounts of ammonium are treated with potassium phosphates, e.g., ammonium phosphate, or phosphoric acid. The magnesium is practically completely removed as magnesium-ammonium phosphate, which is easily separated from the mother liquors by known methods. However, it is also possible to separate part of the magnesium, as described in patent No. 14,537, in the form of magnesium carbonate trihydrate or magnesium-ammonium carbonate, and the rest is precipitated as magnesium-ammonium phosphate. Finally, it is possible to completely dispense with the precipitation of potassium sulfate, which was the first step in the process according to patent No. 14,537, and the crude potassium salt solution can be precipitated directly with potassium phosphate or phosphoric acid, after having previously ensured the presence of sufficient potassium sulfate. Ammonia and ammonium chloride. To precipitate magnesium ammonium phosphate, it is best to use ammonium phosphate or phosphoric acid, which is produced by the synthetic method of obtaining phosphoric acid or by the decomposition of calcium phosphates with sulfuric acid.

PL14935A 1929-08-26 Method of processing potassium salts. PL14935B3 (en)

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PL14935B3 true PL14935B3 (en) 1931-12-31

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