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    • 7. 发明公开
    • VERFAHREN UND ANLAGE ZUR RÜCKGEWINNUNG VON ACRYLSÄURE
    • VERFAHREN UND ANLAGE ZURRÜCKGEWINNUNGVONACRYLSÄURE
    • EP3201167A1
    • 2017-08-09
    • EP15775409.4
    • 2015-09-23
    • BASF SE
    • HAMMON, UlrichWALTER, ThomasOTTENBACHER, MarkusHÜTTEN, Frank
    • C07C51/42C07C51/44C07C57/04
    • The invention relates to a method for recovering acrylic acid, having the following steps a) separating a temperature-controlled mother acid stream from a crystallization device in the direction of an absorption column (201) and in the direction of a splitting column (205), b) supplying the first temperature-controlled mother acid sub-stream as a return flow to the top plate of the splitting column (205), c) supplying at least one strip gas stream below the bottom plate of the splitting column (205), d) supplying an auxiliary component stream, which comprises an oligomeric acrylic acid, from the condensation column (201) to a central base of the splitting column (205), e) splitting at least one part of the oligomeric acrylic acid from the auxiliary component stream in the splitting column (205), thereby obtaining monomeric acrylic acid, f) separating the auxiliary components contained in the auxiliary component stream by means of a counter-current rectification process in the splitting column (205), g) discharging the monomeric acrylic acid without condensation as a gas mixture together with the supplied strip circuit gas stream at the head of the splitting column (205), and h) supplying the gas mixture below the bottom plate of the condensation column (201). The invention further relates to a system (1) for recovering acrylic acid.
    • 一种回收丙烯酸的方法,包括:a)在吸收方向上将加热的母酸物流分成冷凝塔和分离塔; b)将经加热的母酸分子流作为回流供给到解离柱; c)将至少一个汽提气流输入到解离塔中; d)将包含低聚丙烯酸的次要组分料流从吸收塔加入到解离塔中; e)在解离塔中解离部分低聚丙烯酸以产生单体丙烯酸; f)去除包含在解离塔中的次要组分流中的次要组分; g)将单体丙烯酸作为气体混合物与来自解离塔的引入循环汽提气流一起排出; 和h)将气体混合物输入吸收塔。