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Nylon Salt: Hexamethylenediamine and Adipic Acid Crystallized from Alcohol, Carothers 1938
Equal moles of hexamethylenediamine and adipic acid, warmed in watery alcohol until they dissolve, crystallize on cooling as white nylon salt (Carothers, du Pont, US 2,130,947, 1938). The salt always holds the two exactly one to one, which is what makes the nylon come out right.
The picture: our drawing of the warm flask, the crystals and the filter.
Kati
A day
Maagizo
1
1
Weigh one mole each
Weigh one mole each
Weigh 144 g hexamethylenediamine and 174 g adipic acid: one mole of each.
Vifaa kwa hatua hii:
Heksamethilini diamini144 g
Asidi ya adipiki174 gZana zinazohitajika:
Mizani ya dijitali ya jikoni2
2
Warm to dissolve
Warm to dissolve
Put both in a flask with 1300 g of 95 % alcohol and 210 g water. Warm until everything dissolves. Keep flames away from the alcohol.
Zana zinazohitajika:
Chupa ya Erlenmeyer
Sahani ya Kupasha Joto
Etanoli ya maabara, 95 %
Maji yaliyosafishwa kwa mvuke3
3
Cool and filter
Cool and filter
Cool the solution. The salt separates as white crystals. Filter them off.
Zana zinazohitajika:
Kifaneli cha Büchner (kauri)
Pampu ya utupu4
4
Recrystallize
Recrystallize
Dissolve the crystals warm in 1300 g of 95 % alcohol and 200 g water, cool and filter again. Carothers got 247 g, melting at 183–184 °C.
Zana zinazohitajika:
Chupa ya ErlenmeyerSahani ya Kupasha JotoEtanoli ya maabara, 95 %Maji yaliyosafishwa kwa mvukeKifaneli cha Büchner (kauri)Pampu ya utupu5
5
Check the balance
Check the balance
For an exact one-to-one salt, the pH of its solution sits at the turning point of the titration curve, about 7.6 for this pair.
Zana zinazohitajika:
Kipima pH na kifaa cha upimaji6
6
Moles
Moles
Inapakia daftari la Jupyter…
Vifaa
2- Kishikilia Nafasi
- 174 gKishikilia Nafasi
Zana Zinazohitajika
8- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- 1 vendor sell this, none ship to you yetKishikilia Nafasi
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