A na-eji ngwaahịa Mid-nrụgide na-ebugharị na ịchekwa ihe ndị dị na kemịkalụ, dị ka mmanụ anwụrụ ọkụ, amonia mmanụ, propylene, butadiene, isobutene, dimethyl ether na ngwa ndị ọzọ, nke nwere nnukwu olu, ibu dị mfe na nnukwu ngwa ngwa na nbudata na ngwa ngwa ọnụego.