公开(公告)号：US3824253A

公开(公告)日：1974-07-16

申请号：US21322071

申请日：1971-12-28

Applicant: DAICEL LTD

Inventor： UEMATSU E ,  ISHII K ,  TSUJI K ,  MAEHARA M ,  TAKAHASHI H

IPC: C07D327/04 ,  C07D331/04 ,  C07D89/06

CPC classification number: C07D331/04

Abstract: A PROCESS FOR PREPARING PROPANE SULTONE FROM A HYDROXYPROPANE SULFONIC ACID CONTAINING SOLUTION WHICH IS CHARACTERIZED BY CONCENTRATING THE SOLUTION UNTIL THE CONCENTRATION RATIO WITHIN A SPECIFIC RANGE IS REACHED AND THEN SUBJECTING THE OBTAINED CONCENTRATED SOLUTION TO A CONTINUOUS DISTILLATION IN AN AGITATED-FILM EVAPORATOR UNDER A HIGH VACUUM OF LOWER THAN 15 MM. HG TO DISTILL AND RECOVER PROPANE SULTONE.