|MadSci Network: Chemistry|
If you go to the internet search site http://altavista.digital.com/ and do a search for "sulfuric acid" and "production" you will find over 5000 hits. I reviewed the first ten and all had information that was relevant to your question. This would be the fastest way to get information other than going to a larger library and looking in industrial chemistry references.
Try the links in the MadSci Library for more information on Chemistry.