Patent ID: 6969461

Claim:
A filter apparatus for use in removing acids and impurities contained in a fluid comprising: a housing having an inlet and an outlet; a first particulate filter contained in the housing; an acid-neutralizing filter contained in the housing, the acid-neutralizing filter comprising a media container having an imperforate outer side wall surrounding an acid-neutralizing compound, said acid-neutralizing filter being arranged in fluidic parallel with the first particulate filter, and a second particulate filter arranged downstream of the acid-neutralizing compound fluidically between the acid-neutralizing compound and the outlet to prevent particles of acid-neutralizing compound from reaching the outlet; and a conduit contained in the housing, the conduit including a pressure reduction section; wherein the pressure reduction section is arranged to create a pressure differential across the acid-neutralizing filter such that a portion of the fluid to be filtered by the filter apparatus passes through the acid-neutralizing filter.