SARP Sulphuric Acid Recovery Process
SARP Sulphuric Acid Recovery Process : A method for recovering sulfuric acid which has been used for alkylation, for re-use. The acid is reacted with propylene, yielding dipropyl sulfate, which is extracted from the acid tar with isobutane. It is not necessary to hydrolyze the sulfate to sulfuric acid because the sulfate itself is an active alkylation catalyst