UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Sodium Bicarbonate: Soda Crystals Exposed to Carbonic Acid in Chambers (the Old Process)
Before the ammonia-soda works, baking soda was made by simply letting carbonic acid gas soak into soda crystals, as Thorpe's Dictionary (1913) describes. The crystals stand in layers on a lath false bottom; the gas comes in below, nine of the crystals' ten molecules of water drain away as mother liquor, carrying the impurities with it, and after 6 to 9 days the crystals have turned into loose, damp bicarbonate in their own shape. It is dried at no more than 45 °C.
The picture: our diagram.
Utangiye
3 weeks
Amabwiriza
1
1
Stack soda crystals on the lath bottom
Stack soda crystals on the lath bottom
Put ordinary soda crystals (yellow or inferior ones do as well) in regular layers on a false bottom of laths in a closed chamber (preferably iron), leaving space below for the drainage.
Ibikoresho by'iyi ntambwe:
Sode yo kumesa1 as requiredIbikoresho bikenewe:
Icyumba cy'imyuka gifite hasi y'impimbano y'imbaho ntoya
Uturindantoki tw'ikawusu2
2
Pass in carbonic acid for 6 to 9 days
Pass in carbonic acid for 6 to 9 days
Lead carbonic acid gas in below the false bottom; it is usually made from calcium carbonate and hydrochloric acid (ours: whiting in a gas generator). The mother liquor drains off through a U-tube in the chamber bottom. The process is finished when this flow stops, generally in 6 to 9 days.
Ibikoresho by'iyi ntambwe:
Kaboneti ya kalisiyumu (ifu y'umweru)1 as required
Asidi ya kloridiri1 as requiredIbikoresho bikenewe:
Iziko ritanga gazeIcyumba cy'imyuka gifite hasi y'impimbano y'imbaho ntoya
Amadarubindi yo Kwirinda IbinyabutabireUturindantoki tw'ikawusu3
3
Dry at no more than 45 °C
Dry at no more than 45 °C
Open the chamber: the bicarbonate keeps the shape of the crystals but is a loose, very damp powder. Dry it in a stove at no more than 45 °C; this generally takes 8 to 10 days. Ours: a drying oven.
Ibikoresho bikenewe:
Ifuru yo kumishaho
Igipima Ubushyuhe cy'UbushakashatsiIbikoresho
3- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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