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1.发明授权VERFAHREN ZUM HERSTELLEN VON ESTERN AUS UNGESÄTTIGTEN CARBONSÄUREN UND MEHRWERTIGEN ALKOHOLEN 有权METHOD FOR PRODUCING的不饱和羧酸和多元醇的酯
公开(公告)号：EP1204472B1
公开(公告)日：2003-01-29
申请号：EP00958367.5
申请日：2000-08-03
摘要： The invention relates to a method for producing esters from unsaturated carboxylic acids with a higher boiling point than water, especially acrylic acid or methacrylic acid; and polyhydric alcohols in a reactor (2). The liquid reaction mixture (1) contains polymerisation inhibitors and the reaction water that is produced is at least partially separated in a vapour state. The method is characterised in that part of the gas-vapour phase of the reaction mixture (1) is removed from the reactor (2), said part of the gas-vapour phase is partially condensed in a dephlegmator (6), a liquid containing the polymerisation inhibitor is added to the rising gas/vapour mixture and to the off-running condensate from the head of the dephlegmator (6) and the complete off-running mixture is returned to the reactor (2).
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2.发明公开VERFAHREN ZUM HERSTELLEN VON ESTERN AUS UNGESÄTTIGTEN CARBONSÄUREN UND MEHRWERTIGEN ALKOHOLEN 有权METHOD FOR PRODUCING的不饱和羧酸和多元醇的酯
公开(公告)号：EP1204472A1
公开(公告)日：2002-05-15
申请号：EP00958367.5
申请日：2000-08-03
摘要： The invention relates to a method for producing esters from unsaturated carboxylic acids with a higher boiling point than water, especially acrylic acid or methacrylic acid; and polyhydric alcohols in a reactor (2). The liquid reaction mixture (1) contains polymerisation inhibitors and the reaction water that is produced is at least partially separated in a vapour state. The method is characterised in that part of the gas-vapour phase of the reaction mixture (1) is removed from the reactor (2), said part of the gas-vapour phase is partially condensed in a dephlegmator (6), a liquid containing the polymerisation inhibitor is added to the rising gas/vapour mixture and to the off-running condensate from the head of the dephlegmator (6) and the complete off-running mixture is returned to the reactor (2).
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