Type of reaction between (+)-bis salt of (+)-phenylsuccinic acid and HCl Im confused about what type of reaction occurs between the (+)-bis salt of (+)-phenylsuccinic acid and HCl. Would this be considered an acid base reaction or a neautralization reaction? 

MY THOUGHTS: I know that an acid-base reaction occurs between (+)-phenysuccinic acid and (-)-proline to make the (bis)+ salt, im confused at to whether such salt is an acid or a base, or neither... If its an acid and an acid, it would be a neutralization reaction mechanism. If it were a base, it would follow an acid-base reaction mechanism. Any thoughts on if either of these make sense based on such info?
The reaction between the bis salt of proline and phenylsuccinic acid will give free phenyl succinic acid and proline hydrochloride as HCl is a much stronger acid than phenylsuccinic acid. All you are really doing is exchanging one acid for another so it is hardly an acid/base reaction.