UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Ammonium Dihydrogen Phosphate from Superphosphate: Lagrange's Process
Monoammonium phosphate from superphosphate, by Lagrange's process (Thorpe, 1912). Water and steam wash the soluble phosphate out of the superphosphate. A little barium carbonate takes out the gypsum still dissolved, and ammonia in slight excess throws down the last of the lime. The clear liquor holds the salt.
The picture: our own drawing.
Ophakathi
2 days
Imiyalelo
1
1
Leach the superphosphate
Leach the superphosphate
Stir the superphosphate with hot water and steam. Let the calcium sulfate (gypsum) settle and draw off the solution; Lagrange's came to about 42 °Tw.
Izinto zokwakha zalesi sinyathelo:
I-superphosphate yomcako1 kgAmathuluzi adingekayo:
Ibhodwe elinezindonga eziphakeme
Amanzi
I-hydrometer2
2
Take out the dissolved gypsum
Take out the dissolved gypsum
Some gypsum stays dissolved. Add barium carbonate carefully, a little at a time, then filter.
Amathuluzi adingekayo:
I-barium carbonate (i-witherite)
Indwangu yokuhluza kakotini encane
Ijeke Lengilazi3
3
Add ammonia
Add ammonia
Wear gloves; ammonia stings. Add ammonia until in slight excess: all the lime comes down as a phosphate. Filter it off (it can go back into making superphosphate).
Izinto zokwakha zalesi sinyathelo:
Isixazululo se-ammonia - 25-28 %1 as requiredAmathuluzi adingekayo:
Amagilavu E-nitrileIndwangu yokuhluza kakotini encaneIjeke Lengilazi4
4
Crystallise the salt
Crystallise the salt
The clear liquor, at about 32 °Tw, holds the monoammonium phosphate. Evaporate it in a dish to crystallise the salt.
Amathuluzi adingekayo:
I-hydrometer
Ipuleti LokuhwamukaIzinto
2- Isibambeli
- 1 as requiredIsibambeli
Amathuluzi Adingekayo
8- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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