UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hagati
2 days
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Superfosifate y'ishwagara1 kgIbikoresho bikenewe:
Isafuriya y'inkuta ndende
Amazi
Igipima ubwuzuzanye bw'amazi2
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.
Ibikoresho bikenewe:
Karubonate ya bariyumu (witerite)
Umwenda w'ipamba woroheje wo kuyungurura
Icupa ry'Ikirahure3
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).
Ibikoresho by'iyi ntambwe:
Umuti wa amoniyake wa 25-28 %1 as requiredIbikoresho bikenewe:
Uturindantoki twa NitirileUmwenda w'ipamba woroheje wo kuyungururaIcupa ry'Ikirahure4
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.
Ibikoresho bikenewe:
Igipima ubwuzuzanye bw'amazi
Isahani yo kumishaIbikoresho
2- Umwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
8- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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