[fazi305]

can anybody explain some model compunds naphthenic acid?
And different methods to neutralize this acid??

[Arkcon]

https://en.wikipedia.org/wiki/Naphthenic_acid

Naphthenic acid (CAS: 1338-24-5 ) (NAs)is the name for an unspecific mixture of several cyclopentyl and cyclohexyl carboxylic acids with molecular weight of 120 to well over 700 atomic mass units. The main fraction are carboxylic acids with a carbon backbone of 9 to 20 carbons.

So to start with, there are at least 11 to 22 or more individual compounds.  The wikipedia page also talks about the compounds.