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BOLEH PAKAI
Glycerin from Candle-Works Sweet Water: Cap's Process
The sweet water washed out of lime soap in the stearin candle works holds the fat's glycerin, with lime and fatty traces. Cap's process, given in Muspratt's Chemistry (1860), turns it into glycerin: the lime is thrown down as sulfate with sulfuric acid, the liquor is boiled down out of contact with the air, neutralised with chalk, filtered, cleared with bone black and concentrated to a colourless syrup of about 51° Twaddell.
Lanjutan
Several days
Arahan
1
1
Boil down the sweet water
Boil down the sweet water
Reduce the glycerin water drawn off from the lime soap by evaporation over a fire.
Bahan untuk langkah ini:
Air gliserin1 as required
Arang batu bituminus1 as requiredAlatan diperlukan:
Kuali penyejatan
Relau bata2
2
Find how much lime it holds
Find how much lime it holds
Measure out a known volume, precipitate its lime with oxalate of ammonia, collect the precipitate, dry it, burn it and weigh it. From that, work out how much sulfuric acid will just combine with all the lime.
Alatan diperlukan:
Ammonium oksalat
Kertas Turas
Mangkuk Pijar Tanah Liat Tahan Api
Neraca dua piring3
3
Throw the lime down with sulfuric acid
Throw the lime down with sulfuric acid
Add that amount of sulfuric acid. Sulfate of lime falls. Let it settle and decant the clear liquid into another vessel.
Bahan untuk langkah ini:
Asid sulfurik1 as requiredAlatan diperlukan:
Tong kayu besar
Gogal Percikan Kimia
Sarung tangan getah4
4
Boil it out of contact with air, to 14° Twaddell
Boil it out of contact with air, to 14° Twaddell
Boil the liquid in a covered vessel, kept stirred, so the air cannot reach it. The boiling drives off volatile fatty impurities and the liquid loses colour and smell. At 14° Twaddell let it cool: more sulfate of lime falls.
Bahan untuk langkah ini:
Arang batu bituminus1 as requiredAlatan diperlukan:
Tong kayu besar
Pendayung kayuRelau bata
Hidrometer5
5
Neutralise any excess acid with chalk
Neutralise any excess acid with chalk
Test with litmus. If the liquid is acid, add powdered chalk or limestone a little at a time until it is neutral.
Bahan untuk langkah ini:
Kalsium Karbonat - Batu Kapur Hancur1 as requiredAlatan diperlukan:
Kertas litmusPendayung kayu6
6
Boil on to 37.5° and filter
Boil on to 37.5° and filter
Boil again out of contact with air, stirring actively, to 37.5° Twaddell. Collect the sulfate and carbonate of lime on a filter.
Bahan untuk langkah ini:
Arang batu bituminus1 as requiredAlatan diperlukan:
Tong kayu besarPendayung kayuRelau bataHidrometer
Penapis7
7
Reduce to 49°, filtering again if needed
Reduce to 49°, filtering again if needed
Evaporate the filtrate, keeping it well agitated, until on cooling it marks 49° Twaddell. If more sulfate of lime falls, filter again.
Bahan untuk langkah ini:
Arang batu bituminus1 as requiredAlatan diperlukan:
Kuali penyejatanRelau bataHidrometerPenapis8
8
Clear it through bone black
Clear it through bone black
Pass it through washed animal charcoal (bone black) to take out the tinge. It comes through as a colourless solution of about 45° Twaddell.
Alatan diperlukan:
Hitam tulangPenapis9
9
Concentrate to 51° Twaddell
Concentrate to 51° Twaddell
Concentrate it carefully, driving off about a quarter of its weight of water, until the syrupy liquid reads 51.2° Twaddell. Store it closed.
Bahan untuk langkah ini:
Arang batu bituminus1 as requiredAlatan diperlukan:
Kuali penyejatanRelau bataHidrometer10
10
Cap's readings as specific gravity
Cap's readings as specific gravity
Memuatkan buku nota Jupyter…
11
11
Troubleshooting
Troubleshooting
Glycerin troubleshooting.
Flow
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12
12
History and honest limits
History and honest limits
Muspratt (1860) gives Cap's process alongside the older lead-plaster method (olive oil and litharge, the lead removed with hydrogen sulfide). He quotes Wilson that Cap's glycerin, though better than the old product, is not absolutely pure. Bone black is used here as a filter that clears the colour; it is not part of the glycerin. The Twaddell-to-specific-gravity conversion is the standard definition of the scale.
Bahan
4- 1 as requiredPemegang Tempat
- 1 as requiredPemegang Tempat
- 1 as requiredPemegang Tempat
- 1 as requiredPemegang Tempat
Alatan Diperlukan
14- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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