公开(公告)号：MY132756A

公开(公告)日：2007-10-31

申请号：MYPI9800370

申请日：1998-01-26

Applicant: BASF AG

Inventor： HEINZ AUER ,  BERND BEBLING ,  HANS HASSE ,  THOMAS MAYER ,  JURGEN PLUCKHAN DR

IPC: C07D301/32 ,  B01D3/32 ,  C07D303/04

Abstract: IN A PROCESS FOR PURIFICATION OF ETHYLENE OXIDE BY DISTILLATION AN AQUEOUS MIXTURE COMPRISING ETHYLENE OXIDE, FORMALDEHYDE AND AT LEAST 5BY WEIGHT OF WATER IS INTRODUCED VIA A FEED INTO A DISTILLATION APPARATUS COMPRISING AT LEAST ONE DISTILLATION COLUMN, THE MIXTURE BEING INTRODUCED AT A HEIGHT ABOVE THE BOTTOM OF AT LEAST 8 THEORETICAL STAGES, THE ETHYLENE OXIDE IS TAKEN OFF AT THE TOP AND IN THE BOTTOM PHASE A MIXTURE IS OBTAINED WHICH CONTAINS LESS THAN 5BY WEIGHT OF ETHYLENE OXIDE.

公开(公告)号：MXPA05009237A

公开(公告)日：2005-10-19

申请号：MXPA05009237

申请日：2004-03-04

Applicant: BASF AG

Inventor： HANS HASSE

IPC: C07C45/78 ,  C07C45/82 ,  C07C47/058

Abstract: Un metodo para estabilizar soluciones de formaldehido de concentracion elevada que tienen un contenido de CH2O de > 70% en peso contra precipitacion de solidos, que comprende calentar la solucion de formaldehido de concentracion elevada a un regimen de calentamiento de cuando menos 5degree C/min a una temperatura de 80degree C a 200degree C inmediatamente despues de que se ha preparado y almacenarla a una temperatura en esta escala. (Figura 1).

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.