申请人:BASF Aktiengesellschaft
公开号:US07109374B2
公开(公告)日:2006-09-19
A process for the continuous recovery of (meth)acrylic acid from the reaction gas of a catalytic gas-phase oxidation comprising the following process stages is proposed:
I quenching of the reaction gas by evaporative cooling using a high-boiling solvent,
II separation of the (meth)acrylic acid from the quenched reaction gas by absorption into the high-boiling solvent,
III separation of the solvent laden with (meth)acrylic acid by rectification into a first part-stream IIIA), which contains predominantly (meth)acrylic acid, and into a second part-stream IIIB) which contains predominantly the solvent,
IV recycling of the stream IIIB) to process stage II and
V distillative production of (meth)acrylic acid from stream IIIA), all liquid residual streams obtained in process stage V being recycled to process stage I.
提出了一种从催化气相氧化反应气体中连续回收(甲基)丙烯酸的工艺,包括以下工艺阶段:I使用高沸点溶剂蒸发冷却对反应气体进行淬灭处理,II通过吸收到高沸点溶剂中将(甲基)丙烯酸从淬灭处理后的反应气体中分离出来,III将含有(甲基)丙烯酸的溶剂通过精馏分离成第一部分流III A),其中主要含有(甲基)丙烯酸,以及第二部分流IIIB),其中主要含有溶剂,IV将流IIIB)回收到工艺阶段II中,V从流III A)中通过蒸馏生产(甲基)丙烯酸,所有工艺阶段V中获得的所有液体残留流均回收到工艺阶段I中。