| 摘要 |
<p>PURPOSE: A provided eliminates acetic acids and propionic acids from acrylic acids and produces acrylic acids and methacrylic acids by protecting products such as crude acrylic acids or crude methacrylic acids from harmful influences. CONSTITUTION: A method comprises the steps of: producing a gaseous reaction product mixture containing acrylic acid or methacrylic acid which have composition of reaction products of catalytic gas phase oxidization of C3-/C4-alkans, alkenes, alkanols, alkanals and(or) precursor thereof; absorbing the product into lactam solvent mixture dissolved in polar organic solvent; distilling the solvent mixture which has the product and obtaining a solvent mixture and crude acrylic acid or crude methacrylic acid</p> |
