The toxic condenser is a removed colony structure in Master of Orion.
Toxic Condenser technology processes toxins found naturally in the atmosphere of Toxic planets. When these gaseous toxins are brought into a liquid state they can be exported or destroyed, providing work where this facility has been built and increasing Production tiles values by 1.
This structure has been removed from the final version of the game.
It was probably removed from the game because building a toxic processor on the same planet would instantly destroy it.