Pure (meth)acrylic acid and lower (meth)acrylates are prepared from crude (meth)acrylic acid by a process in which I) crude (meth)acrylic acid is separated by crystallization in at least one crystal batch A and at least one mother liquor B and II) at least a part of the crystal batch A is removed as pure (meth)acrylic acid and at least a part of the mother liquor B is used for the preparation of lower (meth)acrylates by esterifying (meth)acrylic acid with the corresponding alcohols in the presence of an acidic catalyst.
通过一种方法制备纯的(甲基)
丙烯酸和低级(甲基)
丙烯酸酯,其中I)通过在至少一个晶体批次A和至少一个母液B中结晶分离粗(甲基)
丙烯酸,II)至少部分晶体批次A被提取为纯的(甲基)
丙烯酸,至少部分母液B用于在酸性催化剂存在下,通过酯化(甲基)
丙烯酸和相应的醇制备低级(甲基)
丙烯酸酯。