We have access to two major encyclopedias related to chemical engineering. Start here for concepts you are unfamiliar with, then move on to the handbooks below. Both of these resources are excellent for finding general process or flow diagrams for major chemicals and commodities - petroleum, chocolate, polymers, etc.
While not as comprehensive or robust as Kirk-Othmer or Ullmann's, these sources can also be used for obtaining additional information on processes, commodities, flow diagrams, etc. This list is also by no means comprehensive, but is meant to show you the variety of sources available to you. Still cannot find what you need? Please contact the Libraries.