[iyc]

In manufacturing Nyon 6.6, a solution of hexane-1,6-diamine(in NaOH_(aq)) is added to a solution of hexanedioyl dichloride (in 1,1,1-trichloromethane).

- What is the use of aqueous sodium hydroxide and 1,1,1-trichloromethane
- If replace the aqueous sodium hydroxide with 1,1,1-trichloromethane, what will happen
- If replace the aqueous sodium hydroxide with water, what will happen

[AWK]

Chloroform is just a solvent for organic compounds. You have water in solution of NaOH.
In classic Schotten-Baumann reaction other basic compounds can be used, eg: Na2CO3, CaO, BaO, MgO, NaHCO3 or CH3COONa.

[iyc]

Excuse me. I would like to ask one more question.
Is it possible that NaOH(aq) is used to provide a alkaline medium to prevent the amine from dissociate( I don't know whether it is described as dissociate) resulting into no raw material for the reaction?

[AWK]

Any base in this reaction is used for removing of HCl. otherway you should use more amine (it is also basic) and amine hydrochloride is formed.

[iyc]

But, what is the aim to remove the HCl molecules?

[Donaldson Tan]

nylon with traces of hydrochloric acid isn't safe to handle. it's corrosive.

[movies]

As AWK alluded to, if you didn't use another base then you would need at least 2 equivalents of amine since the HCl formed in the reaction would protonate any free amine and make it unreactive in the polymerization reaction.