Technology Unit

: Offgas Separation Column
: BASF Dow HPPO
Short Name: Offgas Stripper
Description: After the Epoxidation Reactor(s), a First Column separates the Lights, mainly Propene, Propane, Nitrogen (used as Ballast to avoid the formation of flammable Mixtures in the Epoxidation Reactor) and Oxygen, the latter deriving from the decomposition of HP. The following is an example of the Stream Outlet Composition from the Epoxidation Reactor with the subsequent Separation of the Light-Boiling Compounds: unreacted Propene 0.01 mass-%, Formaldehyde 0.01 %, Acetaldehyde 0.03 %, PO 9.45 %, Methanol 71.97 %, Water 17.54 %, Glycol Ethers 0.43 %, Propene Glycol 0.05 %, Heavy Boilers Remainder.
Link: https://www.drdarrinlew.us/sustainable-chemistry-2/from-the-dream-reaction-to-the-real-process-the-implemented-hppo-process.html