Australian patent AU2014218628 describes a process to convert CO2 and water to acrylic acid

Australian patent AU2014218628 was allowed on October 5, 2018.  The patent describes an environmentally beneficial method for preparing a process for forming acrylic acid that does not use Propylene as a feedstock.  Instead, it describes a process to convert CO2 and water to acrylic acid. Shortcomings and limitations of existing processes are overcome by a process for the production of organic acids having at least three carbon atoms. The process comprises the steps of: forming an amount of carbon monoxide; and reacting the amount of carbon monoxide with an amount of an unsaturated hydrocarbon in the presence of: (a) a supported palladium catalyst;(b) a strong acid; and (c) a phosphine.