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Argon: Air Led over Calcium Carbide and Calcium Chloride at 800 °C (Fischer and Ringe, Thorpe 1912)
Air is nearly 1 % argon. Red-hot calcium carbide with a little calcium chloride swallows both the oxygen and the nitrogen; argon, which combines with nothing, passes straight through.
Result: about 11 litres of argon from 7 kg of carbide in two days. It still holds traces of neon, krypton and xenon (0.25 %, mostly neon).
Source: Thorpe, Dictionary of Applied Chemistry vol. 1 (1912), p. 291, after Fischer and Ringe (Ber. 41, 2017). Not given: the vessel, the air volume, and how the water and carbon dioxide are taken out. Picture drawn by Youblob.
高级
2 days
说明
1
1
Mix the absorbent
Mix the absorbent
Mix calcium carbide (90 %) with calcium chloride (10 %): 7 kg carbide takes about 0.78 kg chloride (our arithmetic). Fill a tube with it. Ours: a porcelain tube in a tube furnace.
所需工具：
碳化钙
氯化钙
瓷管
管式炉2
2
Drive off volatile matter
Drive off volatile matter
Heat the mixture under reduced pressure first, to drive off anything volatile.
所需工具：
真空泵管式炉3
3
Lead air over it at 800 °C
Lead air over it at 800 °C
Hold the mixture at 800 °C and lead air over it slowly. The oxygen and nitrogen are taken up; what comes out is mostly argon. Ours: draw the air through with an aspirator.
此步骤所需材料：
大气空气 - 地球1 as required所需工具：
高温计
抽气器管式炉4
4
Burn the traces over hot copper oxide
Burn the traces over hot copper oxide
Lead the gas over hot copper oxide. It burns any hydrogen, hydrocarbons and carbon monoxide.
所需工具：
氧化铜瓷管管式炉5
5
Take out water and carbon dioxide
Take out water and carbon dioxide
Remove the water vapour and carbon dioxide. Ours: soda lime for the carbon dioxide, then phosphorus pentoxide for the water.
所需工具：
碱石灰（二氧化碳吸收剂）
五氧化二磷
洗气瓶6
6
Collect the argon
Collect the argon
Collect the gas. Expect about 11 litres in two days from 7 kg of carbide. Ours: over water in gas jars.
所需工具：
带集气瓶的排水集气槽此蓝图制作
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