My reaction was an ester hydrolysis of five esters of a single molecule, after hydrolysis HCl still remaining in the product, now I have to remove excess HCl without affecting my carboxylic acid functionality.
Hydrolysis of an ester aims at producing an alcohol & a carboxylic acid or the salt of this acid. Basic hydrolysis gives alcohol + salt of carboxylic acid while acidic hydrolysis yields alcohol + carboxylic acid. The acid-catalyzed hydrolysis of an ester employs sulfuric acid & the like but halo acids such as HCl are NOT used simply because they will give organic halogen compounds (e.g. R-Cl instead of R-OH; R-CO-Cl instead of RCOOH). My advice is to try hydrolysis without HCl.