SYNTHESIS OF ALPHA,BETA-UNSATURATED CARBOXYLIC ACID (METH)ACRYLATES FROM OLEFINS AND CO2

摘要

The invention relates to a method for producing α,β-unsaturated carboxylic acids or salts thereof, comprising a step in which a metallalactone is reacted in a solvent in the presence of a halide; to a composition that comprises α,β-unsaturated carboxylic acids or salts thereof and halide ions; and to the use of said composition for the production of superabsorbent materials or as a monomer composition for producing polymers.

主权项

1. A process for preparing α,β-unsaturated carboxylic acids or salts thereof, wherein it has a process step in which a substance of the formula (I) where E=element of group 4, 6, 7, 8, 9 or 10 of the Periodic Table of the Elements, L=nitrogen- or phosphorus-containing ligand, n=1 to 4, R=H or an aryl or alkyl radical, is reacted in a solvent in the presence of a halide.