The present invention relates to a process for production of acrylic acid, comprising at least the following steps: a. dehydration of glycerine to a dehydration product comprising acrolein； b. gas phase oxidation of the dehydration product to obtain a monomer gas comprising an acrylic acid； c. bringing into contact of the monomer gas with a quench means to obtain a quench phase comprising acrylic acid； d. processing of the quench phase to obtain a monomer phase comprising acrylic acid. The present invention also relates to a process for preparation of polymers by radical polymerisation of acrylic acid, preferably for preparation of water-absorbing polymers, the water-absorbing polymers obtainable by this process, water-absorbing polymers based to at least 25 wt.% upon partially neutralized acrylic acid, a composite, a process for producing a composite, the composite obtainable by this process, the use of acrylic acid in the preparation of water-absorbing polymer structures, a device for preparation of acrylic acid, a process for preparation of acrylic acid and the acrylic acid obtainable by this process.
