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Beech Wood Distilled in an Iron Retort: Tar, Wood Vinegar and Charcoal
Heating hard wood in a closed iron vessel drives off a sour brown liquid, pyroligneous acid or wood vinegar, loaded with tar, and leaves charcoal behind. Andrew Ure (1839) describes the British works: iron cylinders set in brickwork, oak, ash, birch or beech only, and the crude liquor distilled again to leave the tar in the still. Beech tar is the starting point for Reichenbach's paraffin.
The picture: a later, far larger plant: the vertical retort and wood conveyor of the Cliffs Dow wood distillation works in Marquette, Michigan.
Juu
A day's firing, then rectifying
Maagizo
1
1
Cut the wood
Cut the wood
Saw and split beech into billets that fit the retort. Ure: use hard woods only (oak, ash, birch, beech); fir does not answer.
Vifaa kwa hatua hii:
Magogo ya mbao ngumu (mwaloni, mepo, mbeech)20 kgZana zinazohitajika:
Msumeno
Shoka2
2
Charge and lute the retort
Charge and lute the retort
Fill the iron retort, close the mouth with its iron lid, seal the edge with wet clay and wedge it tight. Lead the outlet pipe to a water-cooled condenser running into a barrel.
Zana zinazohitajika:
Chombo cha kuchemshia cha chuma
Udongo
Koili ya kifidishaji
Pipa la mbao3
3
Fire it
Fire it
Light the furnace under the retort and keep it going through the day. Water comes first, then a sooty brown liquor. Ure's sign of the end: a few drops of water thrown on the first, uncooled pipe evaporate quietly.
Vifaa kwa hatua hii:
Kuni1 as requiredZana zinazohitajika:
Chombo cha kuchemshia cha chuma
Glavu Zinazostahimili Joto4
4
Cool, then take out the charcoal
Cool, then take out the charcoal
Let it cool overnight before opening; hot charcoal flares in air. Ure's charcoal came to about one fifth of the wood's weight.
Zana zinazohitajika:
Chombo cha kuchemshia cha chumaGlavu Zinazostahimili Joto5
5
Rectify: vinegar off, tar left
Rectify: vinegar off, tar left
Distil the crude brown liquor again in a copper still. A clearer brown wood vinegar comes over; thick tar stays behind, about a fifth of the liquor (Ure). Pour the tar off into a tank while it is warm.
Zana zinazohitajika:
Alembiki ya shabaKoili ya kifidishaji
Tangi la kutulizia
Kipima-uzito wa majimaji
Miwani ya kinga dhidi ya kemikali6
6
What one charge gives
What one charge gives
Inapakia daftari la Jupyter…
7
7
Limits
Limits
The method and yields are Ure's, from works with 8 cwt charges; the 20 kg charge and the scaling are ours. The gas from the retort burns: lead it away from the fire or burn it under the retort, as the French works did.
Vifaa
2- Kishikilia Nafasi
- 1 as requiredKishikilia Nafasi
Zana Zinazohitajika
11- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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