公开(公告)号：MY122385A

公开(公告)日：2006-04-29

申请号：MYPI9904056

申请日：1999-09-18

Applicant: BASF AG

Inventor： TILL ADRIAN DR ,  BERND BE XDFLING ,  HANS HASSE ,  VANSANT FRANS DR ,  THEIS GERHARD DR

IPC: C07C29/76 ,  C07C29/10 ,  C07C29/80 ,  C07C31/20

Abstract: DISCLOSED IS A PROCESS FOR THE DISTILLATIVE RECOVERY OF HIGH PURITY MONOETHYLENE GLYCOL FROM THE HYDROLYSIS PRODUCT OF ETHYLENE OXIDE BY PRESSURE DEWATERING, VACUUM DEWATERING AND SUBSEQUENT PURIFYING DISTILLATION, WHICH COMPRISES THE PRESSURE DEWATERING COLUMNS OR AT LEAST THE FIRST PRESSURE DEWATERING COLUMN OF THE BATTERY (2, 3, 4) HAVING A STRIPPING SECTION WITH AT LEAST ONE SEPARATING STAGE, PREFERABLY WITH FROM 2 TO 10 SEPARATING STAGES, PARTICULARLY PREFERABLY WITH FROM 3 TO 6 STAGES, AND A PORTION OF THE OVERHEAD STREAM OF THE PRESSURE DEWATERING COLUMN(S) (2, 3, 4) HAVING A STRIPPING SECTION BEING REMOVED FROM THE SYSTEM. (FIGURE 2)

公开(公告)号：MY121383A

公开(公告)日：2006-01-28

申请号：MYPI9904083

申请日：1999-09-20

Applicant: BASF AG

Inventor： TILL ADRIAN DR ,  BERND BE XDFLING ,  HANS HASSE ,  VANSANT FRANS DR ,  THEIS GERHARD DR

IPC: B01D3/38 ,  B01D3/42 ,  C07C29/10 ,  C07C29/80 ,  C07C31/20

Abstract: A PROCESS FOR THE DISTILLATIVE RECOVERY OF HIGH PURITY MONOETHYLENE GLYCOL FROM THE HYDROLYSIS PRODUCT OF ETHYLENE OXIDE BY PRESSURE DEWATERING (2, 3, 4), PREFERABLY IN A BATTERY, VACUUM DEWATERING (5, 10) AND SUBSEQUENT PURIFYING DISTILLATION (6), WHEREIN DURING THE VACUUM DEWATERING AN AQUEOUS STREAM IS WITHDRAWN WHICH CONTAINS MONOETHYLENE GLYCOL IN A CONCENTRATION BELOW 1 % BY WEIGHT, PREFERABLY BELOW 0.1% BY WEIGHT, MEDIUM BOILERS AND LOW BOILERS. THE WITHDRAWN AQUEOUS STREAM IS, OPTIONALLY AFTER FURTHER WORKUP, REMOVED FROM THE SYSTEM.