IL-Des Plaines, Innovate high-purity, high-performance chemicals and materials The future is what you make it. When you join Honeywell, you become a member of our global team of thinkers, innovators, dreamers and doers who make the things that make the future. UOP, a Honeywell company headquartered in Des Plaines, Illinois, is a leading international licensor of processing technology and supplier of engineering s