how is the contact process used in health fields?

Question

anonymous · Answer

The contact process is the current method of producing sulphuric acid in the high concentrations needed for industrial processes. Platinum was formerly employed as a catalyst for the reaction, but as it is susceptible to poisoning by arsenic impurities in the sulphur feedstock, vanadium(V) oxide (V2O5) is now preferred.[1] This process was patented in 1831[citation needed] by the British vinegar merchant Peregrine Phillips.[2] In addition to being a far more economical process for producing concentrated sulphuric acid than the previous lead chamber process, the contact process also produces sulphur trioxide and oleum. http://en.wikipedia.org/wiki/Contact_process