PROCESS FOR A RECTIFICATIVE SEPARATION OF (METH) ACRYLIC ACID FROM A HYDROPHOBIC MIXTURE CONTAINING CRUDE (METH) ACRYLIC ACID

摘要

IN A PROCESS FOR THE SEPARATION BY RECTIFICATION OF (METH)ACRYLIC ACID FROM A MIXTURE CONTAINING (METH)ACRYLIC ACID AND AN INERT HYDROPHOBIC ORGANIC LIQUID HAVING A BOILING POINT HIGHER THAN THAT OF (METH)ACRYLIC ACID AS MAIN CONSTITUENTS AND ALSO LOWER ALDEHYDES AS SECONDARY CONSTITUENTS, A PRIMARY AMINE AND/OR A SALT THEREOF ARE ADDED.