公开(公告)号：DE102005010588A1

公开(公告)日：2006-05-24

申请号：DE102005010588

申请日：2005-03-08

Applicant: BASF AG

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

IPC: C07C67/54 ,  C07C67/08 ,  C07C69/54

Abstract: Continuous preparation of alkyl ester of (meth)acrylic acid (A) comprises supplying (meth)acrylic acid, 1-5C alkanol and acid esterifying catalyst (a) to a reaction zone (5,6), adding the discharged reaction mixture from the zone to a catalyst separation unit (V), separating depleted main stream (56) and depleted sump stream (54) of (A) and (a), initiating (A) containing main stream into a rectification unit (I) and isolating streams of (A). Continuous preparation of alkyl ester of (meth) acrylic acid (A) comprises reaction of (meth) acrylic acid and 1-5C alkanol in homogeneous, liquid, solvent-free phase with increased temperature and in presence of a acidic esterifying catalyst, where (meth)acrylic acid, alkanol and acid esterified catalyst are supplied to a reaction zone (5,6) (that water formed during a retention time are separated rectificative as a component of a alkanol comprising mixture in one of the reaction zone mounted rectification unit (III), in which obtained distillate is isolated in a alkanol containing organic and a water containing aqueous phase, the organic phase is led back into the rectification unit (III) and the aqueous phase is removed, and a reaction mixture (21) are discharged from the reaction zone), where the reaction mixture discharged from the reaction zone is added to a catalyst separation unit (V) and the alkyl ester of (meth)acrylic acid containing in and at acidic esterified catalyst depleted main stream (56) and the predominant part of the acid esterified catalyst containing and at water depleted sump stream (54) are separated in the catalyst separation unit (V) and alkyl ester of (meth)acrylic acid containing main stream is initiated into a rectification unit (I) and the alkyl ester of (meth)acrylic acid containing in main stream (23) and a sump stream (52) are isolated under addition of water.

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)