HCL over H2SO4 There ...
Published by Ned Marco, Hydrologist
HCL over H2SO4
There might be some points to be considered switching from H2SO4 to HCl:
1. HCl dosing pumps are expansive than H2SO4 and more corroded. You have to use high density polypropylene pump. Even you can't use rubbery hose.
2. More HCl is required strength wise to perform a neutralization than it is required to do so by Sulfuric Acid. It also increases the chance to exceed the allowable chloride concentration in the end stream as in textile wastes, it already contains chloride from other sources .
About unfavorable properties of H2SO4 that HCL is free of: HCl is much less costly that H2SO4.