PROCESS FOR MANUFACTURING ACRYLIC ACID

• Main Authors: WILTING JOS, VERKUIJL BASTIAAN J V, BOUWMAN ELISABETH, GERRITSEN GIJSBERT, TERRADE FREDERIC G, VAN KRIEKEN JAN
• Format: Patent
• Language: Chinese; English
• Published: 03.08.2018
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention pertains to a process for preparing acrylic acid and/or the ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer, comprising the steps of bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under reaction conditions decompose under the formation of an acid with a pKa of at most 2.0, with the reaction mixture comprising less than 1 wt. % of water, and keeping the reaction mixture under reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid. It has been found that the use of a bromide source and/or a chloride source in combination with the specified acid results in a processwhich can be operated to