Umkhiqizo we-Mid-pressure usetshenziselwa ukuthutha nokugcina izinto zamakhemikhali, ezifana negesi eyosiwe kaphethiloli, i-ammonrous ammonia, i-propylene, i-butadiene, isobutene, i-dimethyl ether nezinye izinto zamakhemikhali, ezinomthamo omkhulu, isisindo esilula nokulayisha okusheshayo nokulayisha ngokushesha isilinganiso.