ISixokelelwano sokuBuyiselwa kweAcidi yeNkunkuma (ikakhulu i-hydrofluoric acid) isebenzisa ukuguquguquka okwahlukeneyo kumalungu e-asidi yenkunkuma. Ngokusebenzisa i-double column yoxinzelelo lwe-atmospheric yenkqubo ye-distillation eqhubekayo kunye neenkqubo zokulawula ezichanekileyo, yonke inkqubo yokubuyisela isebenza kwindlela evaliweyo, ezenzekelayo kunye nokhuseleko oluphezulu, ukuphumeza izinga eliphezulu lokubuyisela.