Isampulu yeSeti yamalahle kunye neMveliso kwiNkqubo

I-distillation eyomileyo yamalahle. Enye yeenkqubo ezibalulekileyo zeshishini leekhemikhali zamalahle. Ibhekisa kwinkqubo apho amalahle afudunyezwa kwaye abole abekwe yedwa umoya ukuvelisa icoke (okanye i-semi-coke), itela yamalahle, i-benzene ekrwada, igesi yamalahle kunye nezinye iimveliso. I-distillation eyomileyo yamalahle yitshintsho lwekhemikhali. Ngokobushushu obuhlukeneyo bokufudumeza, inokwahlulahlulwa ibe ziindidi ezintathu: i-900 ～ i-1100 ℃ yi-distillation ephezulu eyomileyo, okt coking; I-700 ～ 900 ℃ bubushushu obuphakathi obupholileyo obomileyo; I-500 ～ i-600 ℃ yi-distillation yeqondo elisezantsi lobushushu (jonga i-distillation eyomileyo yamalahle).