| 摘要 |
PURPOSE: To profitably obtain α,β-unsaturated carboxylate ester useful as a raw material for coatings, etc., while preventing the generation of an easily generative polymer and enabling the safe and stable operation of a reactor for a long time, by performing the reaction in the coexistence of hydrogen. CONSTITUTION: A method for producing an α,β-unsaturated carboxylic acid ester comprises reacting (A) an α,β-unsaturated carboxylic acid and/or an α,β-unsaturated carboxylic amide represented by the formula (R1 -R3 are H, a 1-4C alkyl; X is OH, amino) with (B) an aliphatic alcohol in the presence of (C) a solid acid catalyst and in the coexistence of hydrogen. The component A is preferably the mixture of methacrylic acid with methacrylic amide, and the component B is preferably methyl alcohol, ethyl alcohol, etc. The hydrogen and the component B are used in amounts of 0.001-100 moles and 1-50 moles, respectively, per mole of the component A. The reaction is preferably performed under conditions comprising a temperature of 200-450 deg.C, etc. |
