CONTINUOUS METHOD FOR THE PRODUCTION AND PURIFICATION OF (METH)ACRYLIC ACID

摘要

The invention relates to a method for the purification of (meth)acrylic acid comprising a stage which consists of the following steps a) (meth) acrylic acid is crystallized from a mother liquor; b) crystallized (meth) acrylic acid is separated from the mother liquor; c) at least one part of the separated (meth)acrylic acid crystals is melted; d) the melted part is at least partially returned to step a) or b). The inventive method, the device suitable for carrying out said method and the use of the inventive device for the production of (meth) acrylic acid are characterized by the high purity of the (meth) acrylic acid thus obtained, and high efficiency with regard to the desired yield and amount of energy required.