phosgene is among the chlorine recipes
I know, but its not active, how to make it active? I don't remember may i'm stared this game before i installed ur mod? and chlorine processing was researched before

Most players don't have that problem because they don't add mods to a running game.

I know ...

I successfully updated the mod to 0.14 and hopefully removed most bugs, that i created due to porting. The mod actually needs a rewrite, but i don't have the skills and time for that. If you find any issues, please let me know.
https://mods.factorio.com/mods/Orib0ck/SupremeWarfare