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    Olefin oxide prodn
    2.
    发明专利
    Olefin oxide prodn 未知

    公开(公告)号：DE1938857A1

    公开(公告)日：1971-02-11

    申请号：DE1938857

    申请日：1969-07-31

    Applicant: BASF AG

    Inventor： TONI DOCKNER DR ,  MOHR GERD

    IPC: C07D301/06 ,  C07D303/04 ,  C07D1/08

    Abstract: Olefinically unsatd. cpds. with C chain of is not 30C are reacted in liquid phase at elevated temp. with O2 and O2-contng. gas in the presence of an aldehyde having is not 2C and catalysts, opt. under pressure. During the reaction the free carboxylic acid content is kept at 0.1-7% of the total reaction-mixture by means of neutralising agents. Suitable starting material are 3-8C aliph. olefins, 6-12C cycloaliphatic olefins or 8-10C araliphatic olefins, esp. styrene. Suitable aldehydes are 2-8C aliph. aldehydes having hydrocarbon structure apart from aldehyde gp. Reaction may be carried out at 20-200 degrees C under up to 100 atm.

    CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH) ACRYLIC ACID
    3.
    发明专利
    CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH) ACRYLIC ACID 未知

    公开(公告)号：MY117551A

    公开(公告)日：2004-07-31

    申请号：MYPI9700437

    申请日：1997-02-05

    Applicant: BASF AG

    Inventor： ALEXANDER WECK D I FH ,  TONI DOCKNER DR ,  MATTHIAS GEISENDORFER DR ,  HOLGER HERBST DR ,  GERHARD NESTLER DR ,  WILLI SCHMIDT

    IPC: B01J31/02 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    Abstract: IN A PROCESS FOR THE CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID BY REACTION (METH)ACRYLIC ACID WITH ALKANOLS HAVING FROM 1 TO 8 CARBON ATOMS IN A HOMOGENEOUS, LIQUID, SOLVENT-FREE PHASE AT ELEVATED TEMPERATURE AND IN THE PRESENCE OF AN ACID ESTERIFICATION CATALYST, IN WHICH THE (METH)ACRYLIC ACID, THE ALKANOL AND THE ACID CATALYST ARE FED TO A REACTION ZONE (5,6), THE WATER FORMED IS REMOVED BY RECTIFICATION DURING A RESIDENCE TIME AS CONSTITUENT OF A MIXTURE COMPRISING STARTING ALKANOL IN A RECTIFICATION UNIT (III) SUPERPOSED ON THE REACTION ZONE (5,6), THE DISTILLATE OBTAINED IS SEPARATED INTO AN ORGANIC PHASE COMPRISING ALKANOL AND AN AQUEOUS PHASE COMPRISING WATER, THE ORGANIC PHASE IS ESSENTIALLY COMPLETELY RETURNED TO THE RECTIFICATION UNIT (III), THE REACTION MIXTURE IS DISCHARGED FROM THE REACTION ZONE (5,6) AND CONVEYED INTO A DISTILLATIVE SEPARATION ZONE COMPRISING FURTHER RECTIFICATION UNITS (I,II) AND IN THE LATER THE ALKYL (METH)ACRYLATE FORMED IS SEPARATED OFF. A) (METH)ACRYLIC ACID AND ALKANOL ARE REACTED IN A MOLAR RATIO OF FROM 1 :0.75 TO 1 :2, B) PART OF THE AQUEOUS PHASE OBTAINED AT THE TOP OF THE RECTIFICATION UNIT (III) IS RETURNED TO THE RECTIFICATION UNIT, C) THE REACTION MIXTURE DISCHARGED FROM THE REACTION ZONE IS FED TO A FURTHER RECTIFICATION UNIT (I) AND IN THIS THE REACTION MIXTURE IS SEPARATED INTO A PRODUCT (II) COMPRISING THE CATALYST AND A PRODUCT (I) COMPRISING THE ALKYL ESTER OF (METH) ACRYLIC ACID, REMAINING ALKANOL AND REMAINING (METH)ACRYLIC ACID, AND D) THE PRODUCT (I) IS FED TO A FURTHER RECTIFICATION UNIT (II) AND IN THIS THE ALKYL ESTER OF (METH)ACRYLIC ACID IS SEPARATED FROM THE REMAINING ALKANOL AND FROM THE REMAINING (METH)ACRYLIC ACID AND THE REMAINING ALKANOL AND THE REMAINING (METH)ACRYLIC ACID ARE RETURNED TO THE REACTION ZONE.

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