公开(公告)号：MY157865A

公开(公告)日：2016-07-29

申请号：MYPI20060849

申请日：2006-02-28

Applicant: BASF AG

Inventor： HABECK THORSTEN DR ,  RAUH ULRICH ,  FRIESE THORSTEN DR ,  MARTAN HANS DR

IPC: C07C67/54

Abstract: A PROCESS IS DESCRIBED FOR CONTINUOUSLY PREPARING ALKYL ESTERS OF (METH)ACRYLIC ACID BY REACTING (METH)ACRYLIC ACID AND ALKANOLS HAVING FROM 1 TO 5 CARBON ATOMS IN HOMOGENEOUS, LIQUID, SOLVENT-FREE PHASE AT ELEVATED TEMPERATURE AND IN THE PRESENCE OF AN ACIDIC ESTERIFICATION CATALYST, IN WHICH - THE (METH) ACRYLIC ACID, THE ALKANOL AND THE ACIDIC ESTERIFICATION CATALYST ARE FED TO A REACTION ZONE (5, 6), - A REACTION MIXTURE (21) IS DISCHARGED FROM THE REACTION ZONE (5: 6). AND IS INTRODUCED INTO A RECTIFICATION UNIT I AND SEPARATED BY ADDITION OF WATER INTO A TOP STREAM (23), COMPRISING THE ALKYL ESTER OF (METH)ACRYLIC ACID, AND A BOTTOM STREAM (22), AND - A SUBSTREAM OF THE BOTTOM STREAM (22) FROM THE RECTIFICATION UNIT I IS FED TO A RESIDUE DISSOCIATION UNIT IV, WHICH COMPRISES A DISSOCIATING BOILER (61). AND IS SEPARATED THEREIN INTO A TOP STREAM (29), WHICH IS RECYCLED INTO THE RECTIFICATION UNIT I AND A BOTTOM STREAM (40). WHICH IS REMOVED FROM THE SYSTEM, WHEREIN THE RESIDUE DISSOCIATION UNIT IV, AS WELL AS THE DISSOCIATING BOILER (61), FURTHER COMPRISES A RECTIFICATION COLUMN (62), THE WATER CONTENT OF THE LIQUID OBTAINED AT THE BOTTOMMOST STAGE THEREOF BEING LESS THAN 0.1% BY WEIGHT.

公开(公告)号：MY156461A

公开(公告)日：2016-02-26

申请号：MYPI20060956

申请日：2006-03-07

Applicant: BASF AG

Inventor： CLYMO ANTHONY ,  DIEFENBACHER ARMIN DR ,  FRIESE THORSTEN DR ,  MARTAN HANS DR

IPC: C07C69/52

Abstract: A PROCESS IS DESCRIBED FOR CONTINUOUSLY PREPARING ALKYL ESTERS OF (METH)ACRYLIC ACID BY REACTING (METH)ACRYLIC ACID AND ALKANOLS HAVING FROM 1 TO 5 CARBON ATOMS IN HOMOGENEOUS, LIQUID, SOLVENT-FREE PHASE AT ELEVATED TEMPERATURE AND IN THE PRESENCE OF AN ACIDIC ESTERIFICATION CATALYST, IN WHICH THE (METH)ACRYLIC ACID, THE ALKANOL AND THE ACIDIC ESTERIFICATION CATALYST ARE FED TO A REACTION ZONE (5, 6), THE WATER FORMED DURING A RESIDENCE TIME IS REMOVED RECTIFICATIVELY AS A CONSTITUENT OF AN ALKANOL-COMPRISING MIXTURE IN A RECTIFICATION UNIT III ATTACHED TO THE REACTION ZONE (5, 6), THE DISTILLATE OBTAINED HERE IS SEPARATED INTO AN ALKANOL-COMPRISING ORGANIC PHASE AND A WATER-COMPRISING AQUEOUS PHASE, THE ORGANIC PHASE IS RECYCLED INTO THE RECTIFICATION UNIT III AND THE AQUEOUS PHASE IS DISCHARGED, AND A REACTION MIXTURE (21) IS DISCHARGED FROM THE REACTION ZONE (5, 6), WHICH COMPRISES -FEEDING THE REACTION MIXTURE (21) DISCHARGED FROM THE REACTION ZONE (5, 6) TO A CATALYST REMOVAL UNIT V AND SEPARATING IT IN THE CATALYST REMOVAL UNIT V INTO A TOP STREAM (56) COMPRISING THE ALKYL ESTER OF (METH)ACRYLIC ACID AND DEPLETED IN ACIDIC ESTERIFICATION CATALYST, AND A BOTTOM STREAM (54) COMPRISING THE PREDOMINANT PORTION OF THE ACIDIC ESTERIFICATION CATALYST AND DEPLETED IN WATER, AND -INTRODUCING THE TOP STREAM (56) COMPRISING THE ALKYL ESTER OF (METH)ACRYLIC ACID INTO A RECTIFICATION UNIT I AND, WITH ADDITION OF WATER, SEPARATING IT INTO A TOP STREAM (23) COMPRISING THE ALKYL ESTER OF (METH)ACRYLIC ACID, AND A BOTTOM STREAM (52). (FIGURE 1)