公开(公告)号：US3803114A

公开(公告)日：1974-04-09

申请号：US23344972

申请日：1972-03-10

Applicant: ST REGIS PAPER CO

Inventor： REDFORD D ,  MITCHELL D ,  GREEBE F

IPC: C09F1/04 ,  C11B1/10

CPC classification number: C11B1/10 ,  C09F1/04

Abstract: CRUDE SOAP SKIMMINGS, FROM THE KRAFT PLUP PROCESS, ARE UP-GRADED BY REMOVING CONTAINED UNSAPONIFIABLES, THIS IS DONE BY ADMIXING THE SKIMMINGS WITH WATER AND A DEEMULSIFYING ALCOHOL (E.G. METHANOL), CLARIFYING THE MIXTURE, AND CONTAINING THE CLARIFIED SOLUTION WITH A HYDROCARBON (E.G. HEPTANE) WHEREBY THE UNSAPONIFIABLES ARE EDTREATED INTO THE HYDROCARBO PHASE. THE COMPOSITION OF THE EXTRACTION FEED IS CONTROLLED TO ENSURE THAT SUBSTANTIALLY ALL THE UNSAPONIFIABLES ARE EXTRACTED WHILE ONLY A VERY SMALL AMOUNT OF THE SOAPS REPORT IN THE HYDROCARBON PHASE. THE RAFFINATE IS THEN DISTILLED TO RECOVER THE ALCOHOL.