ABSTRACT The isobutylene industry in Indonesia is one of the chemical industries that has good prospects. This isobutylene product has a wide market that is used as an intermediate compound and raw material such as MTBE (Methyl Tertiary Butyl Ether), ETBE (Ethyl Tertiary Butyl Ether), antioxidants, fragrance, lubricants, coatings. This final project aims to design an isobutylene plant that can…