PL15334B1 - Method for the production of potassium nitrate with simultaneous preparation of dimagnesium phosphate. - Google Patents
Method for the production of potassium nitrate with simultaneous preparation of dimagnesium phosphate. Download PDFInfo
- Publication number
- PL15334B1 PL15334B1 PL15334A PL1533429A PL15334B1 PL 15334 B1 PL15334 B1 PL 15334B1 PL 15334 A PL15334 A PL 15334A PL 1533429 A PL1533429 A PL 1533429A PL 15334 B1 PL15334 B1 PL 15334B1
- Authority
- PL
- Poland
- Prior art keywords
- phosphate
- potassium nitrate
- phosphoric acid
- solution
- dimagnesium
- Prior art date
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- FGIUAXJPYTZDNR-UHFFFAOYSA-N Potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 title claims description 14
- 239000004323 potassium nitrate Substances 0.000 title claims description 7
- 235000010333 potassium nitrate Nutrition 0.000 title claims description 7
- MHJAJDCZWVHCPF-UHFFFAOYSA-L Dimagnesium phosphate Chemical compound [Mg+2].OP([O-])([O-])=O MHJAJDCZWVHCPF-UHFFFAOYSA-L 0.000 title claims description 6
- 229910000395 dimagnesium phosphate Inorganic materials 0.000 title claims description 6
- 235000019791 dimagnesium phosphate Nutrition 0.000 title claims description 6
- 239000004137 magnesium phosphate Substances 0.000 title claims description 6
- 238000002360 preparation method Methods 0.000 title claims 3
- 238000004519 manufacturing process Methods 0.000 title description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 15
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L Magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 239000011776 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- GVALZJMUIHGIMD-UHFFFAOYSA-H Magnesium phosphate tribasic Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims 2
- 229910000400 magnesium phosphate tribasic Inorganic materials 0.000 claims 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L Potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims 1
- 230000029087 digestion Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 229910052939 potassium sulfate Inorganic materials 0.000 claims 1
- 235000011151 potassium sulphates Nutrition 0.000 claims 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-N potassium;phosphoric acid Chemical compound [K+].OP(O)(O)=O GNSKLFRGEWLPPA-UHFFFAOYSA-N 0.000 claims 1
- 239000011777 magnesium Substances 0.000 description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 101710012892 PIGK Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
Description
Znane jest roztwarzanie sforanów zapomoca kwasu stracanie wapnia zapomoca tasowego: surowych fo- azotowego i siarczanu po- Ca3(POJ2 + 6HN03 + 3K2S04 = = 3CaS04 + 6KN03 + 2ff3P04.Wynalazek polega na zastosowaniu te¬ go sposobu do wytwarzania czystego azota¬ nu potasowego, przy jednoczesnem usuwa¬ niu kwasu fosforowego z powstalego roz¬ tworu pod postacia fosforanu dwumagne¬ zowego.W tym celu po oddzieleniu gipsu otrzy¬ many roztwór zadaje sie weglanem, wodo¬ rotlenkiem lub tlenkiem magnezu, ewentual¬ nie mieszanina tych cial. Wytracony fosfo¬ ran dwumagnezowy, zawierajacy calkowi¬ ta ilosc P2Ob w postaci rozpuszczalnej w kwasie cytrynowym, uzywa sie jako nawóz albo bezposrednio, albo po odpowiedniej przeróbce.Aby otrzymac czysty Mg HP04 poste¬ puje sie z korzyscia w ten sposób, ze na¬ przód dodaje sie tylko tyle weglanu, wo¬ dorotlenku lub tlenku magnezowego, aby pozostalo w roztworze jeszcze nieco, np. 1%, kwasu fosforowego, oddziela wytraco¬ ny fosforan dwumagnezowy, a 7 roztworu straca reszte kwasu fosforowego zapomo¬ ca dalszej ilosci weglanu magnezowego jar^o Mg^POJa* Pq oddzieleniu wytraconego osadu otrzymuje sie czysty, wolny od kwa¬ su fosforowego roztwór azotanu potasu- Z tego roztworu mozna otrzymywac KN03 •przez wyparowanie lub studzenie. W ostat¬ nim przypadku uzywa sie lugu macierzyste¬ go do rozpuszczania nastepnych ilosci su¬ rowego fosforanu, wzglednie do pierwszego plókania powstalego przytem gipsu, skut¬ kiem czego niewydzielony azotan potasowy powraca do procesu, Oddzielony Mg^{POJ2 uzywa sie przy stracaniu dalszych ilosci Mg HP.04, dzieki czemu uzyskuje sie wszystek kwas fosforo¬ wy jako Mg HP04: Frzebieg reakcji odbywa sie wedlug na¬ stepujacych równan: 6KNOs + 2H#POt + 2MgCOz = =2 Mg HP04 + 6KNÓ3 + 2 H20 + 2 C02 2 HBP04 + 3 MgCO* = = MgJPOJz + 3C02 + 3H20 fl3P04 + Mg^POJ2 = 3 Mg HP04 Mg HP04 wypada przy temperaturze okolo 30°C lub powyzej w postaci krysta¬ licznej i moze byc latwo oddzielony od roz¬ tworu KNOs. PLIt is known to dissolve phosphates by means of acid, the loss of calcium in the form of potassium: raw nitrogen and sulphate by Ca3 (POJ2 + 6HNO3 + 3K2SO4 = = 3CaSO4 + 6KNO3 + 2ff3PO4. The invention consists in applying this method to the production of pure potassium nitrate, while removing phosphoric acid from the resulting solution in the form of dimagnesium phosphate. For this purpose, after separating the gypsum, the resulting solution is mixed with carbonate, hydroxide or magnesium oxide, or possibly a mixture of these bodies. A dimagnesium wound containing the total amount of P2Ob in citric acid-soluble form is used as a fertilizer either directly or after appropriate treatment. To obtain pure Mg H04, it is advantageous to add only enough carbonate, hydroxide or magnesium oxide to leave some phosphoric acid, for example 1%, in the solution, the precipitated dimagnesium phosphate separates, and the 7 solution separates All the remainder of the phosphoric acid, by means of a further quantity of magnesium carbonate and Mg. PO 3, in the separation of the precipitate, a pure, phosphoric acid-free potassium nitrate solution is obtained. From this solution, KNO 3 can be obtained by evaporation or cooling. In the latter case, the mother liquor is used to dissolve the next amounts of crude phosphate, or until the first stripping formed by the gypsum, with the result that the unresolved potassium nitrate returns to the process. The separated Mg ^ {POJ2 is used when further amounts are lost. Mg HP.04, thanks to which all phosphoric acid is obtained as Mg HP04: The course of the reaction is according to the following equations: 6KNOs + 2H # POt + 2MgCOz = = 2 Mg HP04 + 6KNO3 + 2 H20 + 2 CO2 2 HBP04 + 3 MgCO * = = MgJPOJz + 3CO2 + 3H2Ofl3PO4 + Mg2 POJ2 = 3 Mg HP04 Mg HPO4 falls out at a temperature of about 30 ° C or above in crystalline form and can be easily separated from the KNOs solution. PL
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL15334B1 true PL15334B1 (en) | 1932-01-30 |
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